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Artículos de revistas sobre el tema "Disordered photonic systems"

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Publicado: 10 de marzo de 2023

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1

Sgrignuoli, Fabrizio, Giacomo Mazzamuto, Niccolò Caselli, et al. "Necklace State Hallmark in Disordered 2D Photonic Systems." ACS Photonics 2, no. 11 (2015): 1636–43. http://dx.doi.org/10.1021/acsphotonics.5b00422.

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2

Wang, Hongfei, Xiujuan Zhang, Jinguo Hua, Dangyuan Lei, Minghui Lu, and Yanfeng Chen. "Topological physics of non-Hermitian optics and photonics: a review." Journal of Optics 23, no. 12 (2021): 123001. http://dx.doi.org/10.1088/2040-8986/ac2e15.

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Abstract The notion of non-Hermitian optics and photonics rooted in quantum mechanics and photonic systems has recently attracted considerable attention ushering in tremendous progress on theoretical foundations and photonic applications, benefiting from the flexibility of photonic platforms. In this review, we first introduce the non-Hermitian topological physics from the symmetry of matrices and complex energy spectra to the characteristics of Jordan normal forms, exceptional points, biorthogonal eigenvectors, Bloch/non-Bloch band theories, topological invariants and topological classificati
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3

Granchi, Nicoletta, Richard Spalding, Kris Stokkereit, et al. "Engineering high Q/V photonic modes in correlated disordered systems." EPJ Web of Conferences 266 (2022): 05005. http://dx.doi.org/10.1051/epjconf/202226605005.

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Hyperuniform disordered (HuD) photonic materials have recently been shown to display several localized states with relatively high Q factors. However, their spatial position is not predictable a priori. Here we experimentally benchmark through near-field spectroscopy the engineering of high Q/V resonant modes in a defect inside a HuD pattern. These deterministic modes, coexisting with Anderson-localized modes, are a valid candidate for implementations in optoelectronic devices due to the spatial isotropy of the HuD environment upon which they are built.
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4

DeGottardi, Wade, and Mohammad Hafezi. "Stability of fractional quantum Hall states in disordered photonic systems." New Journal of Physics 19, no. 11 (2017): 115004. http://dx.doi.org/10.1088/1367-2630/aa89a5.

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5

Caselli, Niccolò, Francesca Intonti, Federico La China, et al. "Near-field speckle imaging of light localization in disordered photonic systems." Applied Physics Letters 110, no. 8 (2017): 081102. http://dx.doi.org/10.1063/1.4976747.

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6

Wang, Guang-Lei, Hong-Ya Xu, and Ying-Cheng Lai. "Can a photonic thermalization gap arise in disordered non-Hermitian Hamiltonian systems?" EPL (Europhysics Letters) 125, no. 3 (2019): 30003. http://dx.doi.org/10.1209/0295-5075/125/30003.

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7

Sarma, Raktim, Abigail Pribisova, Bjorn Sumner, and Jayson Briscoe. "Classification of Intensity Distributions of Transmission Eigenchannels of Disordered Nanophotonic Structures Using Machine Learning." Applied Sciences 12, no. 13 (2022): 6642. http://dx.doi.org/10.3390/app12136642.

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Light-matter interaction optimization in complex nanophotonic structures is a critical step towards the tailored performance of photonic devices. The increasing complexity of such systems requires new optimization strategies beyond intuitive methods. For example, in disordered photonic structures, the spatial distribution of energy densities has large random fluctuations due to the interference of multiply scattered electromagnetic waves, even though the statistically averaged spatial profiles of the transmission eigenchannels are universal. Classification of these eigenchannels for a single c
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8

Ricouvier, Joshua, Patrick Tabeling, and Pavel Yazhgur. "Foam as a self-assembling amorphous photonic band gap material." Proceedings of the National Academy of Sciences 116, no. 19 (2019): 9202–7. http://dx.doi.org/10.1073/pnas.1820526116.

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We show that slightly polydisperse disordered 2D foams can be used as a self-assembled template for isotropic photonic band gap (PBG) materials for transverse electric (TE) polarization. Calculations based on in-house experimental and simulated foam structures demonstrate that, at sufficient refractive index contrast, a dry foam organization with threefold nodes and long slender Plateau borders is especially advantageous to open a large PBG. A transition from dry to wet foam structure rapidly closes the PBG mainly by formation of bigger fourfold nodes, filling the PBG with defect modes. By tun
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9

Bin Tarik, Farhan, Azadeh Famili, Yingjie Lao, and Judson D. Ryckman. "Robust optical physical unclonable function using disordered photonic integrated circuits." Nanophotonics 9, no. 9 (2020): 2817–28. http://dx.doi.org/10.1515/nanoph-2020-0049.

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AbstractPhysical unclonable function (PUF) has emerged as a promising and important security primitive for use in modern systems and devices, due to their increasingly embedded, distributed, unsupervised, and physically exposed nature. However, optical PUFs based on speckle patterns, chaos, or ‘strong’ disorder are so far notoriously sensitive to probing and/or environmental variations. Here we report an optical PUF designed for robustness against fluctuations in optical angular/spatial alignment, polarization, and temperature. This is achieved using an integrated quasicrystal interferometer (
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10

Wang, Michelle, Cooper Doyle, Bryn Bell, et al. "Topologically protected entangled photonic states." Nanophotonics 8, no. 8 (2019): 1327–35. http://dx.doi.org/10.1515/nanoph-2019-0058.

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AbstractEntangled multiphoton states lie at the heart of quantum information, computing, and communications. In recent years, topology has risen as a new avenue to robustly transport quantum states in the presence of fabrication defects, disorder, and other noise sources. Whereas topological protection of single photons and correlated photons has been recently demonstrated experimentally, the observation of topologically protected entangled states has thus far remained elusive. Here, we experimentally demonstrate the topological protection of spatially entangled biphoton states. We observe rob
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11

Jacucci, Gianni, Silvia Vignolini, and Lukas Schertel. "The limitations of extending nature’s color palette in correlated, disordered systems." Proceedings of the National Academy of Sciences 117, no. 38 (2020): 23345–49. http://dx.doi.org/10.1073/pnas.2010486117.

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Living organisms have developed a wide range of appearances from iridescent to matte textures. Interestingly, angular-independent structural colors, where isotropy in the scattering structure is present, only produce coloration in the blue wavelength region of the visible spectrum. One might, therefore, wonder if such observation is a limitation of the architecture of the palette of materials available in nature. Here, by exploiting numerical modeling, we discuss the origin of isotropic structural colors without restriction to a specific light scattering regime. We show that high color purity
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12

DE LUCA, A., V. BARNA, S. FERJANI, et al. "LASER ACTION IN DYE DOPED LIQUID CRYSTALS: FROM PERIODIC STRUCTURES TO RANDOM MEDIA." Journal of Nonlinear Optical Physics & Materials 18, no. 03 (2009): 349–65. http://dx.doi.org/10.1142/s0218863509004725.

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The birefringence and natural ability to form periodic structures make cholesteric liquid crystalline (CLC — chiral nematics) materials particularly attractive as 1D photonic band gap systems. If a CLC is doped with dye fluorescent molecules, in such a way that the maximum peak of fluorescence matches one of the edges of the selective stop band, laser action is expected at that spectral position. By confining the helical super-structure of chiral liquid crystals in polymeric micro-cavity channels, a tunable microcavity laser array was achieved. In multiple scattering systems, the propagation o
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13

Pradeesh, K., Nageswara Rao Kotla, Shahab Ahmad, Vindesh K. Dwivedi, and G. Vijaya Prakash. "Naturally Self-Assembled Nanosystems and Their Templated Structures for Photonic Applications." Journal of Nanoparticles 2013 (March 20, 2013): 1–13. http://dx.doi.org/10.1155/2013/531871.

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Self-assembly has the advantage of fabricating structures of complex functionalities, from molecular levels to as big as macroscopic levels. Natural self-assembly involves self-aggregation of one or more materials (organic and/or inorganic) into desired structures while templated self-assembly involves interstitial space filling of diverse nature entities into self-assembled ordered/disordered templates (both from molecular to macro levels). These artificial and engineered new-generation materials offer many advantages over their individual counterparts. This paper reviews and explores the adv
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14

Houdré, R., C. Weisbuch, R. P. Stanley, U. Oesterle, and M. Ilegems. "Coherence effects in light scattering of two-dimensional photonic disordered systems: Elastic scattering of cavity polaritons." Physical Review B 61, no. 20 (2000): R13333—R13336. http://dx.doi.org/10.1103/physrevb.61.r13333.

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15

Hayran, Zeki, Seyyed Ali Hassani Gangaraj, and Francesco Monticone. "Topologically protected broadband rerouting of propagating waves around complex objects." Nanophotonics 8, no. 8 (2019): 1371–78. http://dx.doi.org/10.1515/nanoph-2019-0075.

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AbstractAchieving robust propagation and guiding of electromagnetic waves through complex and disordered structures is a major goal of modern photonics research, for both classical and quantum applications. Although the realization of backscattering-free and disorder-immune guided waves has recently become possible through various photonic schemes inspired by topological insulators in condensed matter physics, the interaction between such topologically protected guided waves and free-space propagating waves remains mostly unexplored, especially in the context of scattering systems. Here, we th
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16

Sun, Yanwen, Vincent Esposito, Philip Adam Hart, et al. "A Contrast Calibration Protocol for X-ray Speckle Visibility Spectroscopy." Applied Sciences 11, no. 21 (2021): 10041. http://dx.doi.org/10.3390/app112110041.

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X-ray free electron lasers, with their ultrashort highly coherent pulses, opened up the opportunity of probing ultrafast nano- and atomic-scale dynamics in amorphous and disordered material systems via speckle visibility spectroscopy. However, the anticipated count rate in a typical experiment is usually low. Therefore, visibility needs to be extracted via photon statistics analysis, i.e., by estimating the probabilities of multiple photons per pixel events using pixelated detectors. Considering the realistic X-ray detector responses including charge cloud sharing between pixels, pixel readout
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17

Lin, Ronghui, Valerio Mazzone, Nasir Alfaraj, Jianping Liu, Xiaohang Li, and Andrea Fratalocchi. "On‐Chip Disordered Lasers: On‐Chip Hyperuniform Lasers for Controllable Transitions in Disordered Systems (Laser Photonics Rev. 14(2)/2020)." Laser & Photonics Reviews 14, no. 2 (2020): 2070017. http://dx.doi.org/10.1002/lpor.202070017.

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18

Goussev, Arseni, Rodolfo A. Jalabert, Horacio M. Pastawski, and Diego A. Wisniacki. "Loschmidt echo and time reversal in complex systems." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2069 (2016): 20150383. http://dx.doi.org/10.1098/rsta.2015.0383.

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Echoes are ubiquitous phenomena in several branches of physics, ranging from acoustics, optics, condensed matter and cold atoms to geophysics. They are at the base of a number of very useful experimental techniques, such as nuclear magnetic resonance, photon echo and time-reversal mirrors. Particularly interesting physical effects are obtained when the echo studies are performed on complex systems, either classically chaotic, disordered or many-body. Consequently, the term Loschmidt echo has been coined to designate and quantify the revival occurring when an imperfect time-reversal procedure i
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19

YUKALOV, V. I. "PROPERTIES OF SOLIDS WITH PORES AND CRACKS." International Journal of Modern Physics B 03, no. 02 (1989): 311–26. http://dx.doi.org/10.1142/s0217979289000245.

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A model of solids with pores and cracks or other regions of disorder is constructed. Stability conditions for such a solid are considered in the case of an effective attraction between particles and without external fields. The possibility of the appearance of the phonon-photon superradiance in the ensemble of charged cracks is discussed. The relative variation of the Mössbauer-effect probability for partially disordered systems, compared with completely ordered ones, is calculated and found to be in a very good agreement with experimental results.
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20

Thouless, David. "ANDERSON LOCALIZATION IN THE SEVENTIES AND BEYOND." International Journal of Modern Physics B 24, no. 12n13 (2010): 1507–25. http://dx.doi.org/10.1142/s0217979210064496.

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Little attention was paid to Anderson's challenging paper on localization for the first ten years, but from 1968 onwards it generated a lot of interest. Around that time a number of important questions were raised by the community, on matters such as the existence of a sharp distinction between localized and extended states, or between conductors and insulators. For some of these questions the answers are unambiguous. There certainly are energy ranges in which states are exponentially localized, in the presence of a static disordered potential. In a weakly disordered one-dimensional potential,
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21

Cordella, Gianfranco, Antonio Tripodo, Francesco Puosi, Dario Pisignano, and Dino Leporini. "Nanoscale Elastoplastic Wrinkling of Ultrathin Molecular Films." International Journal of Molecular Sciences 22, no. 21 (2021): 11732. http://dx.doi.org/10.3390/ijms222111732.

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Ultrathin molecular films deposited on a substrate are ubiquitously used in electronics, photonics, and additive manufacturing methods. The nanoscale surface instability of these systems under uniaxial compression is investigated here by molecular dynamics simulations. We focus on deviations from the homogeneous macroscopic behavior due to the discrete, disordered nature of the deformed system, which might have critical importance for applications. The instability, which develops in the elastoplastic regime above a finite critical strain, leads to the growth of unidimensional wrinkling up to s
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22

Titova, Nadezhda A., Nina A. Tovpeko, Anna I. Kardakova, and Gregory N. Goltsman. "Promising Superconducting Materials for Highly Sensitive Detectors of the Infrared and Terahertz Ranges." Vestnik RFFI, no. 3 (July 31, 2019): 46–58. http://dx.doi.org/10.22204/2410-4639-2019-103-03-46-58.

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Modern technologies of photonics, astrophysics, medicine and security systems have a demand for development of new types of sensitive detectors and/or optimization of existing ones. As an example, a strong demand exists for improvement of the characteristics of highly sensitive detectors based on superconducting materials. One way to optimize the performance of such detectors is to select a suitable superconducting material. This is due to the fact that the technical characteristics of devices are determined by relaxation mechanisms of nonequilibrium processes that occur in the material upon a
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23

Zhang, Zhe, Pierre Delplace, and Romain Fleury. "Superior robustness of anomalous non-reciprocal topological edge states." Nature 598, no. 7880 (2021): 293–97. http://dx.doi.org/10.1038/s41586-021-03868-7.

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AbstractRobustness against disorder and defects is a pivotal advantage of topological systems1, manifested by the absence of electronic backscattering in the quantum-Hall2 and spin-Hall effects3, and by unidirectional waveguiding in their classical analogues4,5. Two-dimensional (2D) topological insulators4–13, in particular, provide unprecedented opportunities in a variety of fields owing to their compact planar geometries, which are compatible with the fabrication technologies used in modern electronics and photonics. Among all 2D topological phases, Chern insulators14–25 are currently the mo
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24

Du, Mu, Maoquan Huang, Xiyu Yu, Xingjie Ren, and Qie Sun. "Structure Design of Polymer-Based Films for Passive Daytime Radiative Cooling." Micromachines 13, no. 12 (2022): 2137. http://dx.doi.org/10.3390/mi13122137.

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Passive daytime radiative cooling (PDRC), a cooling method that needs no additional energy, has become increasingly popular in recent years. The combination of disordered media and polymeric photonics will hopefully lead to the large-scale fabrication of high-performance PDRC devices. This work aims to study two typical PDRC structures, the randomly distributed silica particle (RDSP) structure and the porous structure, and systematically investigates the effects of structural parameters (diameter D, volume fraction fv, and thickness t) on the radiative properties of the common plastic material
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25

Zhu, Yuntong, and Jennifer L. M. Rupp. "Designing High Entropy Amorphous Oxides for Li-Battery Electrolytes." ECS Meeting Abstracts MA2022-02, no. 4 (2022): 472. http://dx.doi.org/10.1149/ma2022-024472mtgabs.

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Amorphous Li-oxides such as LiPON and amorphous Li garnet are considered as promising solid-state electrolytes for use in hybrid or all-solid-state oxide- and sulfide-based batteries as separators or protective layers.1-3 These materials possess several appealing characteristics, such as their intrinsic grain-boundary-free nature and relatively low manufacturing temperature (ranging from room temperature to 600 °C), which facilitates co-synthesis with Co-substituted or even Co-free cathodes that are unstable at standard electrolyte sintering temperatures. Alternatively, they can be applied as
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26

Cerjan, Alexander, Mohan Wang, Sheng Huang, Kevin P. Chen, and Mikael C. Rechtsman. "Thouless pumping in disordered photonic systems." Light: Science & Applications 9, no. 1 (2020). http://dx.doi.org/10.1038/s41377-020-00408-2.

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Abstract Thouless charge pumping protocols provide a route for one-dimensional systems to realize topological transport. Here, using arrays of evanescently coupled optical waveguides, we experimentally demonstrate bulk Thouless pumping in the presence of disorder. The degree of pumping is quite tolerant to significant deviations from adiabaticity as well as the addition of system disorder until the disorder is sufficiently strong to reduce the bulk mobility gap of the system to be on the scale of the modulation frequency of the system. Moreover, we show that this approach realizes near-full-un
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27

Chen Yang, Zhang Tian-Yang, Guo Guang-Can, and Ren Xi-Feng. "Integrated photonic quantum simulation." Acta Physica Sinica, 2022, 0. http://dx.doi.org/10.7498/aps.71.20221938.

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Using a controllable quantum system to study another complicated or hard-to-control quantum system, quantum simulation provides a valuable tool to explore complex unknown quantum systems, which cannot be simulated on classical computers due to the exponential explosion of the Hilbert space. Among different kinds of physical realizations of quantum simulation, integrated optical systems have emerged as appropriate platforms in recent years, due to the advantages of flexible control, weak decoherence and lack of interaction in optical systems. In this review, we attempt to introduce some of the
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28

Jung, Pawel S., Georgios G. Pyrialakos, Fan O. Wu, et al. "Thermal control of the topological edge flow in nonlinear photonic lattices." Nature Communications 13, no. 1 (2022). http://dx.doi.org/10.1038/s41467-022-32069-7.

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AbstractThe chaotic evolution resulting from the interplay between topology and nonlinearity in photonic systems generally forbids the sustainability of optical currents. Here, we systematically explore the nonlinear evolution dynamics in topological photonic lattices within the framework of optical thermodynamics. By considering an archetypical two-dimensional Haldane photonic lattice, we discover several prethermal states beyond the topological phase transition point and a stable global equilibrium response, associated with a specific optical temperature and chemical potential. Along these l
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29

Klatt, Michael A., Paul J. Steinhardt, and Salvatore Torquato. "Wave propagation and band tails of two-dimensional disordered systems in the thermodynamic limit." Proceedings of the National Academy of Sciences 119, no. 52 (2022). http://dx.doi.org/10.1073/pnas.2213633119.

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Understanding the nature and formation of band gaps associated with the propagation of electromagnetic, electronic, or elastic waves in disordered materials as a function of system size presents fundamental and technological challenges. In particular, a basic question is whether band gaps in disordered systems exist in the thermodynamic limit. To explore this issue, we use a two-stage ensemble approach to study the formation of complete photonic band gaps (PBGs) for a sequence of increasingly large systems spanning a broad range of two-dimensional photonic network solids with varying degrees o
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30

Novitsky, Denis V., Dmitry Lyakhov, Dominik Michels, Dmitrii Redka, Alexander A. Pavlov, and Alexander S. Shalin. "Controlling wave fronts with tunable disordered non-Hermitian multilayers." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-84271-0.

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AbstractUnique and flexible properties of non-Hermitian photonic systems attract ever-increasing attention via delivering a whole bunch of novel optical effects and allowing for efficient tuning light-matter interactions on nano- and microscales. Together with an increasing demand for the fast and spatially compact methods of light governing, this peculiar approach paves a broad avenue to novel optical applications. Here, unifying the approaches of disordered metamaterials and non-Hermitian photonics, we propose a conceptually new and simple architecture driven by disordered loss-gain multilay
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31

Steinfurth, Andrea, Ivor Krešić, Sebastian Weidemann, et al. "Observation of photonic constant-intensity waves and induced transparency in tailored non-Hermitian lattices." Science Advances 8, no. 21 (2022). http://dx.doi.org/10.1126/sciadv.abl7412.

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Light propagation is strongly affected by scattering due to imperfections in the complex medium. It has been recently theoretically predicted that a scattering-free transport through an inhomogeneous medium is achievable by non-Hermitian tailoring of the complex refractive index. Here, we implement photonic constant-intensity waves in an inhomogeneous, linear, discrete mesh lattice. By extending the existing theoretical framework, we experimentally show that a driven non-Hermitian tailoring allows us to control the propagation and diffraction of light even in highly disordered systems. In this
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32

Torquato, Salvatore. "Extraordinary disordered hyperuniform multifunctional composites." Journal of Composite Materials, August 8, 2022, 002199832211164. http://dx.doi.org/10.1177/00219983221116432.

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A variety of performance demands are being placed on material systems, including desirable mechanical, thermal, electrical, optical, acoustic and flow properties. The purpose of the present article is to review the emerging field of disordered hyperuniform composites and their novel multifunctional characteristics. Disordered hyperuniform media are exotic amorphous states of matter that are characterized by an anomalous suppression of large-scale volume-fraction fluctuations compared to those in “garden-variety” disordered materials. Such unusual composites can have advantages over their perio
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33

Dikopoltsev, Alex, Sebastian Weidemann, Mark Kremer, et al. "Observation of Anderson localization beyond the spectrum of the disorder." Science Advances 8, no. 21 (2022). http://dx.doi.org/10.1126/sciadv.abn7769.

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Anderson localization predicts that transport in one-dimensional uncorrelated disordered systems comes to a complete halt, experiencing no transport whatsoever. However, in reality, a disordered physical system is always correlated because it must have a finite spectrum. Common wisdom in the field states that localization is dominant only for wave packets whose spectral extent resides within the region of the wave number span of the disorder. Here, we show experimentally that Anderson localization can occur and even be dominant for wave packets residing entirely outside the spectral extent of
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34

Chen, Jianfeng, and Zhi-Yuan Li. "Topological photonic states in gyromagnetic photonic crystals: physics, properties and applications." Chinese Physics B, September 19, 2022. http://dx.doi.org/10.1088/1674-1056/ac92d7.

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Abstract Topological photonic states (TPSs) as a new type of waveguide state with one-way transport property can resist backscattering and are impervious to defects, disorders and metallic obstacles. Gyromagnetic photonic crystal (GPC) is the first artificial microstructure to implement TPSs, and it is also one of the most important platforms for generating truly one-way TPSs and exploring their novel physical properties, transport phenomena and advanced applications. Herein, we present a brief review of the fundamental physics, novel properties and practical applications of TPSs based on GPCs
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35

Vicentini, Filippo, Fabrizio Minganti, Alberto Biella, Giuliano Orso, and Cristiano Ciuti. "Optimal stochastic unraveling of disordered open quantum systems: Application to driven-dissipative photonic lattices." Physical Review A 99, no. 3 (2019). http://dx.doi.org/10.1103/physreva.99.032115.

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36

Herzig Sheinfux, Hanan, Ido Kaminer, Azriel Z. Genack, and Mordechai Segev. "Interplay between evanescence and disorder in deep subwavelength photonic structures." Nature Communications 7, no. 1 (2016). http://dx.doi.org/10.1038/ncomms12927.

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AbstractDeep subwavelength features are expected to have minimal impact on wave transport. Here we show that in contrast to this common understanding, disorder can have a dramatic effect in a one-dimensional disordered optical system with spatial features a thousand times smaller than the wavelength. We examine a unique regime of Anderson localization where the localization length is shown to scale linearly with the wavelength instead of diverging, because of the role of evanescent waves. In addition, we demonstrate an unusual order of magnitude enhancement of transmission induced due to local
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37

Ragavendran, Lakshmi Thara, Aruna Priya P, and Chittaranjan Nayak. "Numerical study of temperature and pressure effect on one dimensional random photonic crystal used as biosensors in the detection of breast cancer cells." Physica Scripta, December 20, 2022. http://dx.doi.org/10.1088/1402-4896/acad43.

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Abstract For the past few decades, investigations of cancer cells were made using periodic/defective-periodic photonic structures. Utilizing the unique properties of a disordered photonic crystal for detecting the bio-analytes is still missing. This work incorporates the opto-biological properties of one-dimensional random photonic systems to design the two differently randomized biosensors for sensing breast cancer cells. These random sensors are differentiated from one another based on their random arrangements and random thicknesses. To obtain efficient outcomes, the thickness of the dielec
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38

Lin, Ho-Chun, Zeyu Wang, and Chia Wei Hsu. "Fast multi-source nanophotonic simulations using augmented partial factorization." Nature Computational Science, December 15, 2022. http://dx.doi.org/10.1038/s43588-022-00370-6.

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AbstractNumerical solutions of Maxwell’s equations are indispensable for nanophotonics and electromagnetics but are constrained when it comes to large systems, especially multi-channel ones such as disordered media, aperiodic metasurfaces and densely packed photonic circuits where the many inputs require many large-scale simulations. Conventionally, before extracting the quantities of interest, Maxwell’s equations are first solved on every element of a discretization basis set that contains much more information than is typically needed. Furthermore, such simulations are often performed one in
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39

Lin, Quan, Tianyu Li, Lei Xiao, Kunkun Wang, Wei Yi, and Peng Xue. "Observation of non-Hermitian topological Anderson insulator in quantum dynamics." Nature Communications 13, no. 1 (2022). http://dx.doi.org/10.1038/s41467-022-30938-9.

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AbstractDisorder and non-Hermiticity dramatically impact the topological and localization properties of a quantum system, giving rise to intriguing quantum states of matter. The rich interplay of disorder, non-Hermiticity, and topology is epitomized by the recently proposed non-Hermitian topological Anderson insulator that hosts a plethora of exotic phenomena. Here we experimentally simulate the non-Hermitian topological Anderson insulator using disordered photonic quantum walks, and characterize its localization and topological properties. In particular, we focus on the competition between An
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40

Zhou, Qingjia, Yangyang Fu, Lujun Huang, et al. "Geometry symmetry-free and higher-order optical bound states in the continuum." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-24686-5.

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AbstractGeometrical symmetry plays a significant role in implementing robust, symmetry-protected, bound states in the continuum (BICs). However, this benefit is only theoretical in many cases since fabricated samples’ unavoidable imperfections may easily break the stringent geometrical requirements. Here we propose an approach by introducing the concept of geometrical-symmetry-free but symmetry-protected BICs, realized using the static-like environment induced by a zero-index metamaterial (ZIM). We find that robust BICs exist and are protected from the disordered distribution of multiple objec
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41

Rizzo, Giorgio, Marco Lo Presti, Cinzia Giannini, et al. "Bombyx mori Silk Fibroin Regeneration in Solution of Lanthanide Ions: A Systematic Investigation." Frontiers in Bioengineering and Biotechnology 9 (June 10, 2021). http://dx.doi.org/10.3389/fbioe.2021.653033.

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Silk Fibroin (SF) obtained from Bombyx mori is a very attractive biopolymer that can be useful for many technological applications, from optoelectronics and photonics to biomedicine. It can be processed from aqueous solutions to obtain many scaffolds. SF dissolution is possible only with the mediation of chaotropic salts that disrupt the secondary structure of the protein. As a consequence, recovered materials have disordered structures. In a previous paper, it was shown that, by modifying the standard Ajisawa’s method by using a lanthanide salt, CeCl3, as the chaotropic agent, it is possible
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42

Jupri, Siti Aishah, Sib Krishna Ghoshal, Muhammad Firdaus Omar, and Sunita Sharma. "Improved absorbance of holmium activated magnesium-zinc-sulfophosphate glass." Malaysian Journal of Fundamental and Applied Sciences 13, no. 3 (2017). http://dx.doi.org/10.11113/mjfas.v13n3.559.

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Constant efforts are dedicated to overcome the limitations of phosphate based glass system, where sulfophosphate glasses (SPGs) played a key role. Rare earth ions (REIs) doped magnesium zinc SPG (MZSPG) systems are technologically prospective due to their several unique attributes. Construction of integrated light amplifier and solid state laser needs the maximum gain within small component dimensions. Thus, Ho3+ ions doped SPGs are believed to meet this demand. Ho3+ ions having sharp optical absorption peaks in the spectral range of 200–900 nm is useful for diversified applications. Conversely
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43

Tsabedze, Sebenzile, Nkosikhona Dlamini, and Simiso K. Khumbulani Mkhonta. "Regularity and resilience of short-range order in uniformly randomized lattices." Journal of Physics Communications, October 11, 2022. http://dx.doi.org/10.1088/2399-6528/ac9954.

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Abstract Randomly perturbed lattice models play a vital role in the exploration of novel quasi-disordered structures such as disordered photonic crystals that combine the coherent optical effects of crystals and the broadband, isotropic power spectra of disordered media. Recent studies have shown that the Bragg scattering peaks of uniformly randomized lattices can be switch-on and -off by increasing the perturbation strength while preserving the long-range order of the underlying lattice. In this work, we investigate the pair correlation statistics of uniformly randomized lattices focusing on
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44

Tomarchio, Luca, Salvatore Macis, Annalisa D’Arco, et al. "Disordered photonics behavior from terahertz to ultraviolet of a three-dimensional graphene network." NPG Asia Materials 13, no. 1 (2021). http://dx.doi.org/10.1038/s41427-021-00341-9.

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AbstractThe diffusion of light by random materials is a general phenomenon that appears in many different systems, spanning from colloidal suspension in liquid crystals to disordered metal sponges and paper composed of random fibers. Random scattering is also a key element behind mimicry of several animals, such as white beetles and chameleons. Here, random scattering is related to micro and nanosized spatial structures affecting a broad electromagnetic region. In this work, we have investigated how random scattering modulates the optical properties, from terahertz to ultraviolet light, of a n
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45

Kaiser, Christina, Oskar J. Sandberg, Nasim Zarrabi, Wei Li, Paul Meredith, and Ardalan Armin. "A universal Urbach rule for disordered organic semiconductors." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-24202-9.

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AbstractIn crystalline semiconductors, absorption onset sharpness is characterized by temperature-dependent Urbach energies. These energies quantify the static, structural disorder causing localized exponential-tail states, and dynamic disorder from electron-phonon scattering. Applicability of this exponential-tail model to disordered solids has been long debated. Nonetheless, exponential fittings are routinely applied to sub-gap absorption analysis of organic semiconductors. Herein, we elucidate the sub-gap spectral line-shapes of organic semiconductors and their blends by temperature-depende
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46

Matityahu, Shlomi, Hartmut Schmidt, Alexander Bilmes, et al. "Dynamical decoupling of quantum two-level systems by coherent multiple Landau–Zener transitions." npj Quantum Information 5, no. 1 (2019). http://dx.doi.org/10.1038/s41534-019-0228-x.

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AbstractIncreasing and stabilizing the coherence of superconducting quantum circuits and resonators is of utmost importance for various technologies, ranging from quantum information processors to highly sensitive detectors of low-temperature radiation in astrophysics. A major source of noise in such devices is a bath of quantum two-level systems (TLSs) with broad distribution of energies, existing in disordered dielectrics and on surfaces. Here we study the dielectric loss of superconducting resonators in the presence of a periodic electric bias field, which sweeps near-resonant TLSs in and o
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47

Giordani, Taira, Walter Schirmacher, Giancarlo Ruocco, and Marco Leonetti. "Transverse and Quantum Localization of Light: A Review on Theory and Experiments." Frontiers in Physics 9 (August 25, 2021). http://dx.doi.org/10.3389/fphy.2021.715663.

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Anderson localization is an interference effect yielding a drastic reduction of diffusion—including complete hindrance—of wave packets such as sound, electromagnetic waves, and particle wave functions in the presence of strong disorder. In optics, this effect has been observed and demonstrated unquestionably only in dimensionally reduced systems. In particular, transverse localization (TL) occurs in optical fibers, which are disordered orthogonal to and translationally invariant along the propagation direction. The resonant and tube-shaped localized states act as micro-fiber-like single-mode t
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