Relevant bibliographies by topics / Dark-Bright exciton splitting

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  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Dark-Bright exciton splitting'

Author: Grafiati
Published: 24 June 2023
Last updated: 31 July 2025

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Journal articles on the topic "Dark-Bright exciton splitting"

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Golovatenko, Aleksandr A., Ina V. Kalitukha, Grigorii S. Dimitriev, et al. "A Comparative Study of the Band-Edge Exciton Fine Structure in Zinc Blende and Wurtzite CdSe Nanocrystals." Nanomaterials 12, no. 23 (2022): 4269. http://dx.doi.org/10.3390/nano12234269.

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In this paper, we studied the role of the crystal structure in spheroidal CdSe nanocrystals on the band-edge exciton fine structure. Ensembles of zinc blende and wurtzite CdSe nanocrystals are investigated experimentally by two optical techniques: fluorescence line narrowing (FLN) and time-resolved photoluminescence. We argue that the zero-phonon line evaluated by the FLN technique gives the ensemble-averaged energy splitting between the lowest bright and dark exciton states, while the activation energy from the temperature-dependent photoluminescence decay is smaller and corresponds to the en
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2

Hou, Lei, Philippe Tamarat, and Brahim Lounis. "Revealing the Exciton Fine Structure in Lead Halide Perovskite Nanocrystals." Nanomaterials 11, no. 4 (2021): 1058. http://dx.doi.org/10.3390/nano11041058.

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Lead-halide perovskite nanocrystals (NCs) are attractive nano-building blocks for photovoltaics and optoelectronic devices as well as quantum light sources. Such developments require a better knowledge of the fundamental electronic and optical properties of the band-edge exciton, whose fine structure has long been debated. In this review, we give an overview of recent magneto-optical spectroscopic studies revealing the entire excitonic fine structure and relaxation mechanisms in these materials, using a single-NC approach to get rid of their inhomogeneities in morphology and crystal structure.
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Baranowski, Michał, Mateusz Dyksik, and Paulina Płochocka. "2D Metal Halide Perovskites: A New Fascinating Playground for Exciton Fine Structure Investigations." Scientiae Radices 01, no. 01 (2022): 3–25. http://dx.doi.org/10.58332/v22i1a01.

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Two-dimensional (2D) metal halide perovskites are natural quantum wells which consist of low bandgap metal-halide slabs, surrounded by organic spacers barriers. The quantum and dielectric confinements provided by the organic part lead to the extreme exciton binding energy which results in a huge enhancement of exciton fine structure in this material system. This makes 2D perovskites a fascinating playground for fundamental excitonic physics studies. In this review, we summarize the current understanding and quantification of the exciton fine structure in 2D perovskites. We discuss what is the
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SHAVER, J., A. SRIVASTAVA, J. KONO, et al. "HIGH FIELD MAGNETO-OPTICAL SPECTROSCOPY OF HIGHLY ALIGNED INDIVIDUAL AND ENSEMBLE SINGLE-WALLED CARBON NANOTUBES." International Journal of Modern Physics B 23, no. 12n13 (2009): 2667–75. http://dx.doi.org/10.1142/s0217979209062153.

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The tubular nature of single-walled carbon nanotube (SWCNT) crystals allows them to exhibit non-intuitive quantum phenomena when threaded by a magnetic flux, which breaks the time reversal symmetry and adds an Aharonov-Bohm phase to the circumferential boundary conditions on the electronic wave function. We demonstrate that such a symmetry-breaking magnetic field can dramatically "brighten" an optically-inactive, or dark, exciton state at low temperature. This phenomenon, magnetic brightening, can be understood as a consequence of interplay between the strong intervalley Coulomb mixing and fie
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Guilloux, Victor, Amal Ghribi, Kaïs Boujdaria, et al. "Exciton fine structure of a single highly anisotropic CsPbBr3 nanocrystal." EPJ Web of Conferences 287 (2023): 05009. http://dx.doi.org/10.1051/epjconf/202328705009.

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We measured the photoluminescence (PL) of single CsPbBr3 nanocrystals (NCs) that have a highly anisotropic shape and orthorhombic crystal phase. As the thickness of these NCs is much more smaller than the other two dimensions, they are also called nanoplatelets (NPLs). We obtain PL spectra characterized by doublets separated in energy by about 2 meV in average and showing orthogonal and linearly polarized polar lines. We identified these doublets as the two bright-exciton states of the exciton fine structure contained in the plane of the NPLs. By a comparison between theory and experiments, we
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Ghribi, Amal, Rim Ben Aich, Kaïs Boujdaria, et al. "Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets." Nanomaterials 11, no. 11 (2021): 3054. http://dx.doi.org/10.3390/nano11113054.

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Owing to their flexible chemical synthesis and the ability to shape nanostructures, lead halide perovskites have emerged as high potential materials for optoelectronic devices. Here, we investigate the excitonic band edge states and their energies levels in colloidal inorganic lead halide nanoplatelets, particularly the influence of dielectric effects, in a thin quasi-2D system. We use a model including band offset and dielectric confinements in the presence of Coulomb interaction. Short- and long-range contributions, modified by dielectric effects, are also derived, leading to a full modeliza
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Heyn, Christian, Andreas Gräfenstein, Geoffrey Pirard, et al. "Dot-Size Dependent Excitons in Droplet-Etched Cone-Shell GaAs Quantum Dots." Nanomaterials 12, no. 17 (2022): 2981. http://dx.doi.org/10.3390/nano12172981.

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Strain-free GaAs quantum dots (QDs) are fabricated by filling droplet-etched nanoholes in AlGaAs. Using a template of nominally identical nanoholes, the QD size is precisely controlled by the thickness of the GaAs filling layer. Atomic force microscopy indicates that the QDs have a cone-shell shape. From single-dot photoluminescence measurements, values of the exciton emission energy (1.58...1.82 eV), the exciton–biexciton splitting (1.8...2.5 meV), the exciton radiative lifetime of bright (0.37...0.58 ns) and dark (3.2...6.7 ns) states, the quantum efficiency (0.89...0.92), and the oscillator
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8

Oshima, Tsuyoshi, Kazunori Matsuno, and Hidekatsu Suzuura. "Energy splitting between bright and dark excitons in carbon nanotubes." Physica E: Low-dimensional Systems and Nanostructures 42, no. 4 (2010): 779–82. http://dx.doi.org/10.1016/j.physe.2009.11.131.

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Kuno, Ken. "(Invited) A Polaron Paradigm for Perovskite Nanocrystal Emitting States." ECS Meeting Abstracts MA2024-01, no. 13 (2024): 1088. http://dx.doi.org/10.1149/ma2024-01131088mtgabs.

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Perovskite NCs such as CsPbBr3 have numerous uses. Most involve exploiting their light emission and are motivated by their defect tolerance and large, as-made emission quantum yields. Absent, though, is a fundamental understanding of perovskite NC emitting states, central to these applications. Of particular note are observations of near-universal, size-, temperature-, and composition-dependent absorption/emission Stokes shifts where observed energy differences are between absorbing and emitting states. Very little is known about the origin of these shifts. Moreover, little is known about the
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Li, Wei-Hua, Jhen-Dong Lin, Ping-Yuan Lo, et al. "The Key Role of Non-Local Screening in the Environment-Insensitive Exciton Fine Structures of Transition-Metal Dichalcogenide Monolayers." Nanomaterials 13, no. 11 (2023): 1739. http://dx.doi.org/10.3390/nano13111739.

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In this work, we present a comprehensive theoretical and computational investigation of exciton fine structures of WSe2-monolayers, one of the best-known two-dimensional (2D) transition-metal dichalcogenides (TMDs), in various dielectric-layered environments by solving the first-principles-based Bethe–Salpeter equation. While the physical and electronic properties of atomically thin nanomaterials are normally sensitive to the variation of the surrounding environment, our studies reveal that the influence of the dielectric environment on the exciton fine structures of TMD-MLs is surprisingly li
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Dissertations / Theses on the topic "Dark-Bright exciton splitting"

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Wang, Shuli. "Étude des propriétés électroniques des perovskites bidimensionnelles à halogénure métallique par spectroscopie magnéto-optique." Electronic Thesis or Diss., Toulouse, INSA, 2023. http://www.theses.fr/2023ISAT0004.

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Ces dernières années, les matériaux pérovskites bidimensionnels (2D) ont attiré une attention considérable en raison de leurs propriétés électroniques et optiques uniques et excellentes, qui en font un semi-conducteur extrêmement prometteur pour les applications d'émission de lumière et d'affichage. En outre, la pérovskite non magnétique peut devenir un semi-conducteur magnétique en incorporant des impuretés magnétiques dans les réseaux de la pérovskite hôte pour introduire des propriétés magnétiques. La coexistence d'excellentes propriétés optoélectroniques et magnétiques fait de la pérovskit
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Conference papers on the topic "Dark-Bright exciton splitting"

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Oshima, Tsuyoshi, Hidekatsu Suzuura, Jisoon Ihm, and Hyeonsik Cheong. "Chirality Dependence of the Energy Splitting Between Bright and Dark Excitons in Semiconducting Carbon Nanotubes." In PHYSICS OF SEMICONDUCTORS: 30th International Conference on the Physics of Semiconductors. AIP, 2011. http://dx.doi.org/10.1063/1.3666622.

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