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Journal articles on the topic 'Quantum confinement of light'

Author: Grafiati

Published: 3 June 2025

Last updated: 20 July 2025

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1

Maksimenko, S. A., G. Ya Slepyan, N. N. Ledentsov, V. P. Kalosha, A. Hoffmann, and D. Bimberg. "Light confinement in a quantum dot." Semiconductor Science and Technology 15, no. 6 (2000): 491–96. http://dx.doi.org/10.1088/0268-1242/15/6/301.

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2

Salehani, Hojjatollah K., and Maedeh Zakeri. "Investigation of Light Absorption in a ZnS Quantum Dot." Journal of Spectroscopy 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/850352.

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The light absorption of a ZnS quantum dot with a parabolic confinement potential is studied in this paper in the presence of magnetic field perpendicular to dot plane. The Schrodinger equation of a single electron is solved numerically, and energy spectra and wave functions are obtained. Then, the optical absorption coefficients in transition from ground state to different excited states are calculated. The effects the magnetic field and quantum dot width on the optical absorption are investigated. It is found that the optical absorption coefficient has a blue shift by increasing of magnetic f

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3

Hoang, Tu, Jisk Holleman, and Jurriaan Schmitz. "SOI-LEDs with Carrier Confinement." Materials Science Forum 590 (August 2008): 101–16. http://dx.doi.org/10.4028/www.scientific.net/msf.590.101.

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Silicon-On-Insulator (SOI) technology exhibits significant performance advantages over conventional bulk silicon technology in both electronics and optoelectronics. In this chapter we present an overview of recent applications on light emission from SOI materials. Particularly, in our work we used SOI technology to fabricate light emitting diodes (LEDs), which emit around 1130 nm wavelength with an external quantum efficiency of 1.4 × 10−4 at room temperature (corresponding to an internal quantum efficiency close to 1 %). This is almost two orders of magnitude higher than reported earlier for

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4

Pavel, Eugen. "Light Amplification by Quantum Confinement (LAQC) in quantum optical lithography." Optics & Laser Technology 143 (November 2021): 107287. http://dx.doi.org/10.1016/j.optlastec.2021.107287.

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5

Li, Shuo, Wenxu Yin, Weitao Zheng, and Xiaoyu Zhang. "Size matters: quantum confinement-driven dynamics in CsPbI₃ quantum dot light-emitting diodes." Journal of Semiconductors 46, no. 4 (2025): 042103. https://doi.org/10.1088/1674-4926/24120018.

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Abstract The quantum confinement effect fundamentally alters the optical and electronic properties of quantum dots (QDs), making them versatile building blocks for next-generation light-emitting diodes (LEDs). This study investigates how quantum confinement governs the charge transport, exciton dynamics, and emission efficiency in QD-LEDs, using CsPbI3 QDs as a model system. By systematically varying QD sizes, we reveal size-dependent trade-offs in LED performance, such as enhanced efficiency for smaller QDs but increased brightness and stability for larger QDs under high current densities. Ou

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6

KELLER, O. "QUANTUM DOTS OF LIGHT." Journal of Nonlinear Optical Physics & Materials 05, no. 01 (1996): 109–32. http://dx.doi.org/10.1142/s0218863596000118.

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Basic ingredients of a microscopic theory describing the degenerate four-wave mixing of the outgoing field from a mesoscopic source particle were established. Starting from many-body theory and selfenergy quantum electrodynamics it is argued that the best spatial confinement one might hope to obtain of the source field is given by the extension of the transverse part of the current density distribution induced in the mesoscopic particle. Taking into account the phaseconjugation of evanescent components of the source field, the existence of so-called quantum dots of light having a subwavelength

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7

Lazarev, M., A. Rudra, and E. Kapon. "Physical origins of optical anisotropy in quantum-confined semiconductors: The roles of valence band mixing, transition broadening, and state filling." Journal of Applied Physics 133, no. 9 (2023): 094301. http://dx.doi.org/10.1063/5.0131958.

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We investigate experimentally and theoretically the impact of valence band mixing and spectrum of confined states on the polarization of light emitted from or absorbed by GaAs/AlGaAs semiconductor quantum dots and quantum wires with tailored heterostructure potential. In particular, such nanostructures with parabolic-profile confinement potentials, realized by organometallic vapor phase epitaxy inside pyramidal pits, served as model systems for the study. Different degrees of linear polarization (DOLP) of emitted light, depending on the confinement potential profile, the specific excitonic tra

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8

Ballarini, Dario, and Simone De Liberato. "Polaritonics: from microcavities to sub-wavelength confinement." Nanophotonics 8, no. 4 (2019): 641–54. http://dx.doi.org/10.1515/nanoph-2018-0188.

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AbstractFollowing the initial success of cavity quantum electrodynamics in atomic systems, strong coupling between light and matter excitations is now achieved in several solid-state set-ups. In those systems, the possibility to engineer quantum emitters and resonators with very different characteristics has allowed access to novel nonlinear and non-perturbative phenomena of both fundamental and applied interest. In this article, we will review some advances in the field of solid-state cavity quantum electrodynamics, focussing on the scaling of the relevant figures of merit in the transition f

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9

Li, Rusong, Fengqi Liu, and Quanyong Lu. "Quantum Light Source Based on Semiconductor Quantum Dots: A Review." Photonics 10, no. 6 (2023): 639. http://dx.doi.org/10.3390/photonics10060639.

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Quantum light sources that generate single photons and entangled photons have important applications in the fields of secure quantum communication and linear optical quantum computing. Self-assembled semiconductor quantum dots, also known as “artificial atoms”, have discrete energy-level structures due to electronic confinement in all three spatial dimensions. It has the advantages of high stability, high brightness, deterministic, and tunable emission wavelength, and is easy to integrate into an optical microcavity with a high-quality factor, which can realize a high-performance quantum light

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10

Lu, Z. H., D. J. Lockwood, and J. M. Baribeau. "Quantum confinement and light emission in SiO2/Si superlattices." Nature 378, no. 6554 (1995): 258–60. http://dx.doi.org/10.1038/378258a0.

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11

Kostenko, Boris. "Quark-Parton Model and Relativistic Quantum Mechanics." EPJ Web of Conferences 173 (2018): 02012. http://dx.doi.org/10.1051/epjconf/201817302012.

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An attempt to treat the asymptotic freedom and the quark confinement as a self-consistent problem in the framework of relativistic quantum mechanics is realized. It is shown that the confinement of quarks induces a change of their helicities together with a simultaneous alteration of orbital momenta, so that the total angular momentum of each quark is conserved. This observation may cast light on the so-called proton spin puzzle after some additional numerical estimations.

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12

Sugimoto, Hiroshi, Hao Zhou, Miho Takada, Junichiro Fushimi, and Minoru Fujii. "Visible-light driven photocatalytic hydrogen generation by water-soluble all-inorganic core–shell silicon quantum dots." Journal of Materials Chemistry A 8, no. 31 (2020): 15789–94. http://dx.doi.org/10.1039/d0ta01071e.

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Photocatalytic H<sub>2</sub> generation by B,P-codoped Si quantum dots (QDs) with diameters in the quantum confinement regime is investigated. The H<sub>2</sub> generation rate is enhanced by the increase of reduction ability of Si QDs owing to the quantum size effect.

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13

Xing, Zhongqiu, Yongjie Zhou, Aoxiang Zhang, et al. "Reduction of the threshold current of deep-ultraviolet laser diodes with embedded quantum dots in quantum wells." New Journal of Physics 27, no. 2 (2025): 023032. https://doi.org/10.1088/1367-2630/adb77f.

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Abstract The relationship between electron state density and energy in deep ultraviolet laser diodes (LDs) with quantum well (QW) structures exhibits a step-like shape, which enhances differential gain and light confinement of the LD. However, the active layer in QW structures typically has limited ability to collect equilibrium carriers, leading to an increased threshold current. Quantum dot (QD) structures address this limitation by imposing quantum confinement on charge carriers in three dimensions, thereby reducing optical losses and improving carrier confinement. Despite these advantages,

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14

Yeo, Inah, Doukyun Kim, Kyu-Tae Lee, et al. "Comparative Chemico-Physical Analyses of Strain-Free GaAs/Al0.3Ga0.7As Quantum Dots Grown by Droplet Epitaxy." Nanomaterials 10, no. 7 (2020): 1301. http://dx.doi.org/10.3390/nano10071301.

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We investigate the quantum confinement effects on excitons in several types of strain-free GaAs/Al 0.3 Ga 0.7 As droplet epitaxy (DE) quantum dots (QDs). By performing comparative analyses of energy-dispersive X-ray spectroscopy with the aid of a three-dimensional (3D) envelope-function model, we elucidate the individual quantum confinement characteristics of the QD band structures with respect to their composition profiles and the asymmetries of their geometrical shapes. By precisely controlling the exciton oscillator strength in strain-free QDs, we envisage the possibility of tailoring light

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15

González-Fernández, Alfredo, Joan Juvert, Mariano Aceves-Mijares, and Carlos Domínguez. "Luminescence from Si-Implanted SiO2-Si3N4 Nano Bi-Layers for Electrophotonic Integrated Si Light Sources." Sensors 19, no. 4 (2019): 865. http://dx.doi.org/10.3390/s19040865.

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In this paper, we present structural and luminescence studies of silicon-rich silicon oxide (SRO) and SRO-Si 3 N 4 bi-layers for integration in emitter-waveguide pairs that can be used for photonic lab-on-a-chip sensing applications. The results from bi and mono layers are also compared. Two clearly separated emission bands are respectively attributed to a combination of defect and quantum confinement–related emission in the SRO, as well as to defects found in an oxynitride transition zone that forms between the oxide and the nitride films, while ruling out quantum-confinement phenomena in the

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16

Hbibi, Mohammed, O. Mommadi, Soufiane Chouef, et al. "Unbound Excitonic Properties in a Multilayered Quantum Dot under Hydrostatic Pressure and Temperature." Defect and Diffusion Forum 428 (August 22, 2023): 105–15. http://dx.doi.org/10.4028/p-uflk2m.

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Taking into account the effective mass approximation and the two-band model, we have studied the combined effects of hydrostatic pressure and temperature on the unbound excitonic properties of a cylinder-shaped quantum dot. The two finite confinement potentials along the radial direction and one finite confinement potential along the axial direction have been considered. We have calculated the electronic energy with and without light hole effect as a function of the core radius, hydrostatic pressure and temperature. The numerical results show that the effect of the confinement potential is dom

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17

Di Liberto, Giovanni, Ornella Fatale та Gianfranco Pacchioni. "Role of surface termination and quantum size in α-CsPbX3 (X = Cl, Br, I) 2D nanostructures for solar light harvesting". Physical Chemistry Chemical Physics 23, № 4 (2021): 3031–40. http://dx.doi.org/10.1039/d0cp06245f.

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18

Ma, Zelin, Poul Kristensen, and Siddharth Ramachandran. "Scaling information pathways in optical fibers by topological confinement." Science 380, no. 6642 (2023): 278–82. http://dx.doi.org/10.1126/science.add1874.

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Spatial mode-count scalability in optical fibers is of paramount importance for addressing the upcoming information-capacity crunch, reducing energy consumption per bit, and for enabling advanced quantum computing networks, but this scalability is severely limited by perturbative mode mixing. We show an alternative means of light guidance, in which light’s orbital angular momentum creates a centrifugal barrier for itself, thereby enabling low-loss transmission of light in a conventionally forbidden regime wherein the mode mixing can be naturally curtailed. This enables kilometer-length-scale t

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19

Prevenslik, Thomas. "Quantum Dots by QED." Advanced Materials Research 31 (November 2007): 1–3. http://dx.doi.org/10.4028/www.scientific.net/amr.31.1.

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High quantum dot (QD) efficiency may be explained by excitons generated in the quantum electrodynamics (QED) confinement of electromagnetic (EM) radiation during the absorption of the laser radiation. There is general agreement that by the Mie theory laser photons are fully absorbed by QDs smaller than the laser wavelength. But how the absorbed laser photons are conserved by a QD is another matter. Classically, absorbed laser radiation is treated as heat that in a body having specific heat is conserved by an increase in temperature. However, the specific heats of QDs vanish at frequencies in t

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20

Brodsky, Stanley J., Guy F. de Teramond, and Hans Günter Dosch. "Light-front holographic QCD and color confinement." International Journal of Modern Physics A 29, no. 21 (2014): 1444013. http://dx.doi.org/10.1142/s0217751x14440138.

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One of the most fundamental problems in Quantum Chromodynamics is to understand the origin of the mass scale which controls the range of color confinement and the hadronic spectrum. For example, if one sets the Higgs couplings of quarks to zero, then no mass parameters appear in the QCD Lagrangian, and the theory is conformal at the classical level. Nevertheless, hadrons have a finite mass. We show that a mass gap and a fundamental color confinement scale arise when one extends the formalism of de Alfaro, Fubini and Furlan (dAFF) to frame-independent light-front Hamiltonian theory. Remarkably,

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21

Toscano, Giuseppe, Søren Raza, Wei Yan, et al. "Nonlocal response in plasmonic waveguiding with extreme light confinement." Nanophotonics 2, no. 3 (2013): 161–66. http://dx.doi.org/10.1515/nanoph-2013-0014.

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AbstractWe present a novel wave equation for linearized plasmonic response, obtained by combining the coupled real-space differential equations for the electric field and current density. Nonlocal dynamics are fully accounted for, and the formulation is very well suited for numerical implementation, allowing us to study waveguides with subnanometer cross-sections exhibiting extreme light confinement. We show that groove and wedge waveguides have a fundamental lower limit in their mode confinement, only captured by the nonlocal theory. The limitation translates into an upper limit for the corre

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22

Goyal, A., E. Andrioti, Y. Tang, et al. "Mechanochemical synthesis of stable, quantum-confined CsPbBr₃ perovskite nanocrystals with blue-green emission and high PLQY." Journal of Physics: Materials 5, no. 2 (2022): 024005. http://dx.doi.org/10.1088/2515-7639/ac618f.

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Abstract Cesium lead halides are a family of bright, visible-light emitting materials with near-unity photoluminescence quantum yield (PLQY) in nanocrystals (NCs). The usual way to achieve visible light-emission tunability is by mixing halides, which often leads to phase separation and poor stability. While the NCs should also show size-dependent PL emission, reports on strong quantum confinement in these materials are scarce. Here, we report the synthesis of quantum-confined cesium lead bromide (CsPbBr3) NCs via a facile, environment-friendly, and scalable high-energy mechanochemical synthesi

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23

Zhang, Qianpeng, Daquan Zhang, Zhiyong Fan, and Xiaoliang Mo. "Enhanced Stability and High-Efficiency Lighting with Perovskite Quantum Wires." ECS Meeting Abstracts MA2024-02, no. 51 (2024): 3559. https://doi.org/10.1149/ma2024-02513559mtgabs.

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Perovskite quantum wires (QWRs) represent an innovative class of perovskite materials, distinguished by their minuscule radial dimensions, approximately 5nm, which give rise to pronounced quantum confinement effects. These structures eclipse traditional perovskite thin films in terms of stability, owing to the protective encapsulation and passivation afforded by porous alumina membranes (PAM). Moreover, the quantum confinement intrinsic to QWRs markedly augments their photoluminescence quantum yield (PLQY), outperforming standard nanowires in this regard. Leveraging the remarkable physical att

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24

Shibuya, Kengo, Masanori Koshimizu, Keisuke Asai, and Hiromi Shibata. "Quantum confinement for large light output from pure semiconducting scintillators." Applied Physics Letters 84, no. 22 (2004): 4370–72. http://dx.doi.org/10.1063/1.1756203.

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25

Wu, Kaifeng, and Tianquan Lian. "Quantum confined colloidal nanorod heterostructures for solar-to-fuel conversion." Chemical Society Reviews 45, no. 14 (2016): 3781–810. http://dx.doi.org/10.1039/c5cs00472a.

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Colloidal one-dimensional (1D) semiconductor nanorods (NRs) offer the opportunity to simultaneously maintain quantum confinement in radial dimensions for tunable light absorptions and bulk like carrier transport in the axial direction for long-distance charge separations.

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26

Barnasas, Alexandros, Christos S. Garoufalis, Dimitrios I. Anyfantis, et al. "Quantum Confinement Effects of Thin Co3O4 Films." Atoms 9, no. 4 (2021): 70. http://dx.doi.org/10.3390/atoms9040070.

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Thin Co films were deposited on quartz and Corning glass by radio frequency magnetron sputtering. The films were postannealed at 500 °C in a furnace in air atmosphere. The resulting samples were examined with X-ray diffraction experiments, which revealed that they consist of single-phase, polycrystalline Co3O4. The morphology of selected samples was recorded by atomic force microscopy. Ultraviolet-visible light absorption spectroscopy experiments probed the absorbance of the films in the wavelength range 200–1,100 nm. Two types of transitions (energy gaps) were clearly identified. Both of them

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27

CORNWALL, JOHN M. "ENTROPY IN QUANTUM CHROMODYNAMICS." Modern Physics Letters A 27, no. 09 (2012): 1230011. http://dx.doi.org/10.1142/s021773231230011x.

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We review the role of zero-temperature entropy in several closely-related contexts in QCD. The first is entropy associated with disordered condensates, including [Formula: see text]. The second is effective vacuum entropy arising from QCD solitons such as center vortices, yielding confinement and chiral symmetry breaking. The third is entanglement entropy, which is entropy associated with a pure state, such as the QCD vacuum, when the state is partially unobserved and unknown. Typically, entanglement entropy of an unobserved three-volume scales not with the volume but with the area of its boun

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28

Zhang, Yan-Xia, Hai-Yu Wang, Zhen-Yu Zhang, et al. "Photoluminescence quenching of inorganic cesium lead halides perovskite quantum dots (CsPbX3) by electron/hole acceptor." Physical Chemistry Chemical Physics 19, no. 3 (2017): 1920–26. http://dx.doi.org/10.1039/c6cp04083g.

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CsPbBr<sub>3</sub> QDs with smaller size showed faster carrier recombination rates and PL decay lifetimes due to their relatively stronger quantum confinement effects, which may be useful for applications in photovoltaic and light emission devices.

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29

Wu, Ya-Fen. "High-Temperature Electroluminescence of InGaN/GaN Light-Emitting Devices with Multiple Quantum Barriers." Advances in Condensed Matter Physics 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/145689.

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We investigate the high-temperature characteristics of InGaN/GaN multiple quantum well light-emitting devices with and without multiple quantum barriers (MQBs) in depth. The electroluminescence measurements were carried out over a temperature range from 200 to 380 K and an injection current level from 1 to 100 mA. Enhanced carrier confinement and stronger carrier localization in the active layer are achieved for the sample with MQBs. Furthermore, it is found that the external quantum efficiency of the sample possessing MQBs is higher than that of the sample with GaN barriers. The MQB structure

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30

Usman, Muhammad, Urooj Mushtaq, Dong-Guang Zheng, Dong-Pyo Han, Muhammad Rafiq, and Nazeer Muhammad. "Enhanced Internal Quantum Efficiency of Bandgap-Engineered Green W-Shaped Quantum Well Light-Emitting Diode." Applied Sciences 9, no. 1 (2018): 77. http://dx.doi.org/10.3390/app9010077.

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To improve the internal quantum efficiency of green light-emitting diodes, we present the numerical design and analysis of bandgap-engineered W-shaped quantum well. The numerical results suggest significant improvement in the internal quantum efficiency of the proposed W-LED. The improvement is associated with significantly improved hole confinement due to the localization of indium in the active region, leading to improved radiative recombination rate. In addition, the proposed device shows reduced defect-assisted Shockley-Read-Hall (SRH) recombination rate as well as Auger recombination rate

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Bashir, Jamshad, Muhammad Usman, Dmitri Sergeevich Arteev, Zoya Noor, and Ahmed Ali. "Enhancing Carriers’ Confinement by Introducing BAlGaN Quantum Barriers for the Better Optoelectronic Performance of Deep UV LEDs." Photonics 12, no. 1 (2025): 49. https://doi.org/10.3390/photonics12010049.

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Ultraviolet light-emitting diodes (LEDs) based on Aluminum Gallium Nitride (AlGaN) suffer from poor carriers’ confinement effect, one possible solution to this problem is to increase the barrier heights for carriers by increasing Aluminum content in quantum barriers (QBs), which results in a higher turn-on voltage. Keeping this in mind, we have improved the carriers’ confinement by introducing a small amount of Boron nitride (BN) (2%) in ternary QBs and an electron injecting layer, which results in higher barriers that restrict the out-of-active region movement of electrons and holes. With qua

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32

Palstra, Isabelle M., Hugo M. Doeleman, and A. Femius Koenderink. "Hybrid cavity-antenna systems for quantum optics outside the cryostat?" Nanophotonics 8, no. 9 (2019): 1513–31. http://dx.doi.org/10.1515/nanoph-2019-0062.

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AbstractHybrid cavity-antenna systems have been proposed to combine the sub-wavelength light confinement of plasmonic antennas with microcavity quality factors Q. Here, we examine what confinement and Q can be reached in these hybrid systems, and we address their merits for various applications in classical and quantum optics. Specifically, we investigate their applicability for quantum-optical applications at noncryogenic temperatures. To this end we first derive design rules for hybrid resonances from a simple analytical model. These rules are benchmarked against full-wave simulations of hyb

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Velpula, Ravi, Barsha Jain, Trupti Lenka, and Hieu Nguyen. "Controlled electron leakage in electron blocking layer free InGaN/GaN nanowire light-emitting diodes." Facta universitatis - series: Electronics and Energetics 34, no. 3 (2021): 393–400. http://dx.doi.org/10.2298/fuee2103393v.

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In this study, we have proposed and investigated the effect of coupled quantum wells to reduce electron overflow in InGaN/GaN nanowire white color light-emitting diodes. The coupled quantum well before the active region could decrease the thermal velocity, which leads to a reduced electron mean free path. This improves the electron confinement in the active region and mitigates electron overflow in the devices. In addition, coupled quantum well after the active region utilizes the leaked electrons from the active region and contributes to the white light emission. Therefore, the output power a

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El Fatimy, Abdel, Anindya Nath, Byoung Don Kong, et al. "Ultra-broadband photodetectors based on epitaxial graphene quantum dots." Nanophotonics 7, no. 4 (2018): 735–40. http://dx.doi.org/10.1515/nanoph-2017-0100.

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AbstractGraphene is an ideal material for hot-electron bolometers due to its low heat capacity and weak electron-phonon coupling. Nanostructuring graphene with quantum-dot constrictions yields detectors of electromagnetic radiation with extraordinarily high intrinsic responsivity, higher than 1×109 V W−1 at 3 K. The sensing mechanism is bolometric in nature: the quantum confinement gap causes a strong dependence of the electrical resistance on the electron temperature. Here, we show that this quantum confinement gap does not impose a limitation on the photon energy for light detection and thes

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Lagnese, Gianluca, Federica Maria Surace, Márton Kormos, and Pasquale Calabrese. "Quenches and confinement in a Heisenberg–Ising spin ladder." Journal of Physics A: Mathematical and Theoretical 55, no. 12 (2022): 124003. http://dx.doi.org/10.1088/1751-8121/ac5215.

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Abstract We consider the quantum quench dynamics of a Heisenberg–Ising spin ladder which is an archetypal model in which confinement of elementary excitations is triggered by internal interactions rather than an external field. We show that the confinement strongly affects the light cone structure of correlation functions providing signatures of the velocities of the mesons of the model. We also show that the meson masses can be measured from the real time analysis of the evolution of the order parameter.

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Ripka, Fabian, Harald Kübler, Robert Löw, and Tilman Pfau. "A room-temperature single-photon source based on strongly interacting Rydberg atoms." Science 362, no. 6413 (2018): 446–49. http://dx.doi.org/10.1126/science.aau1949.

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Tailored quantum states of light can be created via a transfer of collective quantum states of matter to light modes. Such collective quantum states emerge in interacting many-body systems if thermal fluctuations are overcome by sufficient interaction strengths. Therefore, ultracold temperatures or strong confinement are typically required. We show that the exaggerated interactions between Rydberg atoms allow for collective quantum states even above room temperature. The emerging Rydberg interactions lead both to suppression of multiple Rydberg state excitations and destructive interference du

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Babu, Bathula, Shaik Gouse Peera, and Kisoo Yoo. "Fabrication of ZnWO4-SnO2 Core–Shell Nanorods for Enhanced Solar Light-Driven Photoelectrochemical Performance." Inorganics 11, no. 5 (2023): 213. http://dx.doi.org/10.3390/inorganics11050213.

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This article describes the effective synthesis of colloidal SnO2 quantum dots and ZnWO4 nanorods using wet chemical synthesis and hydrothermal synthesis, respectively. The resulting ZnWO4-SnO2 core–shell nanorod heterostructure is then made, and its structural, optical, and morphological properties are assessed using XRD, SEM, TEM, and DRS. The heterojunction’s structural confinement increases the exposure of its reactive sites, and its electronic confinement promotes its redox activity. The heterostructure subsequently exhibits a smaller bandgap and better light-harvesting capabilities, resul

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Ferrera, M., M. Rahaman, S. Sanders, et al. "Controlling excitons in the quantum tunneling regime in a hybrid plasmonic/2D semiconductor interface." Applied Physics Reviews 9, no. 3 (2022): 031401. http://dx.doi.org/10.1063/5.0078068.

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The electromagnetic field confinement and amplification typical of nano-sized metallic objects supporting localized surface plasmon resonances, i.e., light-induced collective electronic oscillations, can significantly strengthen the interaction of light with atomically thin transition metal dichalcogenides. In view of the realization of plasmon-enhanced devices, it is crucial to investigate the effects induced by light confinement within metallic nanostructures on the excitonic properties of these materials at the nanoscale. Here, we exploit tip-enhanced photoluminescence spectroscopy to local

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39

DOĞAN, Ü., S. SAKİROĞLU, A. YILDIZ, et al. "EXCITON STATES IN A QUANTUM DOT WITH PARABOLIC CONFINEMENT." International Journal of Modern Physics B 25, no. 32 (2011): 4489–97. http://dx.doi.org/10.1142/s0217979211059279.

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In this study the electronic eigenstructure of an exciton in a parabolic quantum dot (QD) has been calculated with a high accuracy by using Finite element method (FEM). We have converted the coordinates of electron–light-hole system to relative and center of mass coordinate, then placed the Spherical Harmonics into Schrödinger equation analytically and obtained the Schrödinger equation which depends only on the radial variable. Finally we used FEM with only radial variable in order to get the accurate numerical results. We also showed first 21 energy level spectra of exciton depending on confi

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40

de Martini, F., O. Jedrkiewicz, and P. Mataloni. "Quantum Light Generation and Superradiance Effects in the Active Microcavity." Journal of Nonlinear Optical Physics & Materials 07, no. 01 (1998): 121–30. http://dx.doi.org/10.1142/s0218863598000107.

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The process of generation of non-classical radiation in an active Fabry-Perot dye microcavity, under femtosecond excitation, has been investigated. Single photon states, with a non-classical sub-Poissonian distribution have been generated after the excitation of a small number of active molecules, located between the two mirrors. By multiple excitation of the active medium, collective emission phenomena are expected because of the strong superradiant coupling occurring within the transverse coherence area of the microcavity. In particular, we have experimentally verified the principle of relat

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Zou, Jifan, Mengkai Li, Xiaoyu Zhang, and Weitao Zheng. "Perovskite quantum dots: Synthesis, applications, prospects, and challenges." Journal of Applied Physics 132, no. 22 (2022): 220901. http://dx.doi.org/10.1063/5.0126496.

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Metal-trihalide perovskite quantum dots combine the unique semiconducting properties of bulk perovskites with the controllable exciton dynamics benefiting from the quantum confinement effect. Composition- and size-adjustable electronic and optical properties of perovskites convert into a variety of applications. Here, we start from a brief introduction to perovskite quantum dots, followed by a detailed description of the synthesis methods and surface modification/passivation strategies of these nano-sized particles. Then, we review the applications of perovskite quantum dots including light-em

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Shen, Yao-Luen, Chih-Yao Chang, Po-Liang Chen, et al. "Study on the Effects of Quantum Well Location on Optical Characteristics of AlGaN/GaN Light-Emitting HEMT." Micromachines 14, no. 2 (2023): 423. http://dx.doi.org/10.3390/mi14020423.

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In this study, AlGaN/GaN light-emitting HEMTs (LE-HEMT) with a single quantum well inserted in different locations in the epitaxy layers are fabricated and analyzed. For both structures, light-emitting originated from electrons in the 2DEG and holes from the p-GaN for radiative recombination is located in the quantum well. To investigate the importance of the location of single quantum well, optical characteristics are compared by simulation and experimental results. The experimental results show that the main light-emitting wavelength is shifted from 365 nm in the UV range to 525 nm in the vi

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Байрамов, Ф. Б., Е. Д. Полоскин, A. Л. Чернев та ін. "Время жизни колебательных состояний молекул ДНК в функционализированных комплексах полупроводниковых квантовых точек". Письма в журнал технической физики 44, № 2 (2018): 72. http://dx.doi.org/10.21883/pjtf.2018.02.45467.17050.

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AbstractResults of studying nanocrystalline nc-Si/SiO_2 quantum dots (QDs) functionalized by short oligonucleotides show that complexes of isolated crystalline semiconductor QDs are unique objects for detecting the manifestation of new quantum confinement phenomena. It is established that narrow lines observed in high-resolution spectra of inelastic light scattering can be used for determining the characteristic time scale of vibrational excitations of separate nucleotide molecules and for studying structural-dynamic properties of fast oscillatory processes in biomacromolecules.

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Zinoni, C., B. Alloing, C. Paranthoën, and A. Fiore. "Three-dimensional wavelength-scale confinement in quantum dot microcavity light-emitting diodes." Applied Physics Letters 85, no. 12 (2004): 2178–80. http://dx.doi.org/10.1063/1.1791341.

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Djotyan, A. P., A. A. Avetisyan, and E. M. Kazaryan. "Interband Light Absorption in Semiconductor Quantum Dots Connected with the Charged and Neutral Exciton - Donor Complexes." Key Engineering Materials 277-279 (January 2005): 893–98. http://dx.doi.org/10.4028/www.scientific.net/kem.277-279.893.

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The interband light absorption in spherical quantum dot (QD) of semiconductors connected with the charged and neutral exciton-donor complexes are studied theoretically. The oscillator strength for interband optical transition from valence band to the ground state of excitondonor complex in spherical QD has been investigate. The calculations were performed in the cases of infinite and finite potential barrier of QD. The dependences of the oscillator strength on the radius of the QD were obtained. It was shown that the quantum confinement gives rise a giant oscillator strength per impurity.

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Ibragimov, G. B., and R. Z. Ibaeva. "Light absorption by free charge carriers in the presence of phonons in an anisotropic quantum wire." Advanced Physical Research 6, no. 1 (2024): 56–62. http://dx.doi.org/10.62476/apr61.62.

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The absorption of light by free charge carriers has been theoretically studied considering the processes related to scattering from phonons in an anisotropic parabolic quantum wire. The case in which the electromagnetic wave is polarized along the axis of the wire and the case of non-degenerate electron gas statistics have been considered. In this work, it was determined that the dependence of the location of the peaks of the intraband optical absorption coefficient on the characteristic frequency of the confinement potential in quantum wires with asymmetric parabolic potential was .

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Jo, Masafumi, Yuri Itokazu, and Hideki Hirayama. "Milliwatt-power far-UVC AlGaN LEDs on sapphire substrates." Applied Physics Letters 120, no. 21 (2022): 211105. http://dx.doi.org/10.1063/5.0088454.

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AlGaN LEDs emitting < 230 nm UV light were fabricated on sapphire substrates. We employed a quantum well (QW) with an extremely thin barrier to enhance the quantum confinement of holes, wherein the calculation showed that the topmost valence subband became [Formula: see text]-like and increased the transverse-electric polarized emission. Additionally, we modified the Al composition of the spacer layer situated between the QW and an electron-blocking layer, which significantly improved the current-injection efficiency. The combination and optimization of these structures produced an LED emis

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XIAO, YANG, CHAOBIN HE, XUEHONG LU, and XINHAI ZHANG. "ORGANIC–INORGANIC HYBRID NANOPARTICLES WITH QUANTUM CONFINEMENT EFFECT." International Journal of Nanoscience 08, no. 01n02 (2009): 185–90. http://dx.doi.org/10.1142/s0219581x09005980.

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Hybrid light emitting nanoparticles with diameter range from 2 to 4 nm were prepared via grafting organic-conjugated chains directly onto an inorganic rigid cage polyhedral oligomeric silsesquioxanes (POSS). The unique properties of these particles show evidence of quantum confinement effect on the conjugated short chains by two barriers of POSS cage and alkyl chains. The confinement effects are revealed in five aspects. First, the UV and PL spectra redshift as increasing the length of conjugated chains. This phenomenon can be considered as size effect. Second, PL spectra of these nanoparticle

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Ratan Mandal, Arup, Artur Ishteev, Sergey Volchematiev, and Denis V. Kuznetsov. "Sensitive Determination for Papain Conjugated CdSe Quantum Dots by Dynamic Light Scattering Analysis." Advanced Materials Research 1119 (July 2015): 19–23. http://dx.doi.org/10.4028/www.scientific.net/amr.1119.19.

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A strong, simple and rapid method for determination enzyme (papain) conjugated quantum dots (QDs) by dynamic light scattering (DLS) is proposed in this report. Yellow CdSe QDs are synthesized with changing the precursor ratio and confirmed by absorption and emission spectra. Shape and size of synthesized QDs are checked by transmission electron microscope (TEM). Both absorption and emission spectra reveal very strong quantum confinement effect as expected; yellow excitonic emission is observed at room temperature for photoluminescence spectra (PL). The peak maxima are appreciably red-shifted w

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Saddam Hussain, Abdul Sattar, Zamin Abbas, and Zaid Ullah. "INVESTIGATING THE ROLE OF QUANTUM CONFINEMENT AND SURFACE PLASMON RESONANCE IN ENHANCING WATER PURIFICATION EFFICIENCY OF NANOMATERIAL-BASED MEMBRANES." Kashf Journal of Multidisciplinary Research 2, no. 02 (2025): 233–50. https://doi.org/10.71146/kjmr289.

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Wastewater pollution is prevalent worldwide, and therefore, there is a need to come up with proper purification methods. There are also problems of membrane fouling, high energy costs compared to conventional treatments, and inapplicable to many pollutants of the currently available technologies like reverse osmosis and activated carbon adsorption. Newer innovations that have been adopted in nanotechnology include the quantum confinement and the surface plasmon resonance which is useful for the purification of water in nanomaterial-based membranes. This paper investigates the synthesis of quan

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