Article
Chemistry, Multidisciplinary
Qian Liang, Xuekai Ma, Teng Long, Jiannian Yao, Qing Liao, Hongbing Fu
Summary: We demonstrate an organic circularly polarized (CP) laser from a pure organic crystal-filled microcavity without any chiral molecules or chiral structures. The giant anisotropy and excellent laser gain of organic crystals can induce the optical Rashba-Dresselhaus spin-orbit coupling effect, which is conductive to the CP laser in such microcavities. The maximum dissymmetry factor of the CP lasing with opposite helicities reaches 1.2. Our strategy may provide a new idea for the design of CP lasers towards future 3D laser displays, information storage, and other fields.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Optics
O. Kibis, S. A. Kolodny, I. Iorsh
Summary: Theoretical study on the optical properties of semiconductor quantum wells irradiated by a strong circularly polarized electromagnetic field reveals that the field induces composite electron-light states bound at repulsive scatterers, modifying optical characteristics drastically. The quantum interference of direct interband optical transitions and the transitions through light-induced intermediate states results in Fano resonances in optical spectra, which can be detected in state-of-the-art measurements.
Review
Materials Science, Multidisciplinary
Yadong Zhang, Shu Yu, Bing Han, Yunlong Zhou, Xiuwen Zhang, Xiaoqing Gao, Zhiyong Tang
Summary: Due to their magnetic photophysical properties, circularly polarized luminescence (CPL) materials have attracted significant interest. This review provides a comprehensive overview of this field, including theory, experiments, and categorization of CPL-active materials. It also discusses the factors influencing the dissymmetry factor and luminescence efficiency, as well as the opportunities and challenges for enhancing both factors.
Article
Materials Science, Multidisciplinary
Chaolumen Wu, Yadong Yin
Summary: Inorganic nanowires and semiconductor quantum dots are assembled into chiral photonic crystals, which can generate circularly polarized luminescence with significant dissymmetry factor and adjustable peak position, intensity, and sign by controlling the photonic crystals' properties.
Article
Chemistry, Applied
Wenzeng Duan, Kang Li, Honghan Ji, Yanmin Huo, Qingxia Yao, Houting Liu, Shuwen Gong
Summary: In this study, modulation of CPL signals of axially chiral spiroborates was achieved by varying the water fraction in the solvent, leading to aggregation-amplified and aggregation-induced CPL behaviors. Additionally, reversible inversion of CPL signals was observed, attributed to helical self-assemblies and promotion of emissive intramolecular charge transfer states.
Article
Physics, Applied
A. A. Maksimov, E. Filatov, I. I. Tartakovskii, V. D. Kulakovskii, S. G. Tikhodeev, C. Schneider, S. Hoefling
Summary: Engineering the chirality of optical microcavities is a central concept in modern photonics. We demonstrate a compact source of coherent radiation based on an electrically driven, chiral semiconductor microcavity. The device can produce circularly polarized light with polarization exceeding 90% and the direction of polarization can be controlled by the handedness of the chiral photonic crystal slab.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Lijing Chen, Changlong Hao, Jiarong Cai, Chen Chen, Wei Ma, Chuanlai Xu, Liguang Xu, Hua Kuang
Summary: Chiroptical nanomaterials, such as CdSe/CdS chiral films, have been assembled using the Langmuir-Schaeffer technique to achieve high CPL signals. The symmetrical chiral films with ten layers and a 45-degree inter-angle exhibited the highest CD activity and strong CPL signals. The birefringence and dichroism of the well-aligned CdSe/CdS nanorod layers contributed to the remarkable optical activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Optics
Xuan Zhang, Yiyi Xu, Cristian Valenzuela, Xinfang Zhang, Ling Wang, Wei Feng, Quan Li
Summary: This review provides a comprehensive overview of liquid crystal-templated chiral nanomaterials, including their design principles, synthesis strategies, and functional properties. It offers perspectives on the potential applications of these materials in optics, biology, catalysis, and electronics.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Zhiyu Wang, Xiaoming Wang, Zhongwei Chen, Yang Liu, Huilin Xie, Jie Xue, Lingling Mao, Yanfa Yan, Haipeng Lu
Summary: Introducing chirality into metal-halide hybrids has led to various emerging properties such as chiroptical activity, spin-dependent transport, and ferroelectricity. However, most chiral metal-halide hybrids are non-emissive, and the mechanism behind this is not well understood. In this study, we present a new strategy to activate circularly polarized luminescence (CPL) in chiral metal-halide hybrids by alloying Sb3+ into chiral indium-chloride hybrids. This results in highly luminescent chiral indium-antimony chlorides with strong CPL signals and tunable energy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
John A. Gil-Corrales, Alvaro L. Morales, Carlos A. Duque
Summary: In this study, the physics of a GaAs quantum well with AlGaAs barriers was characterized and analyzed based on an interior doped layer. Using the self-consistent method, the probability density, energy spectrum, and electronic density were analyzed by solving the Schrodinger, Poisson, and charge-neutrality equations. The system's response to geometric changes in well width and non-geometric changes in the doped layer's position, width, and donor density were reviewed. The finite difference method was used to solve all second-order differential equations. Finally, the optical absorption coefficient and electromagnetically induced transparency between the first three confined states were calculated using the obtained wave functions and energies, showing the potential for tunability through system geometry and doped-layer characteristics.
Article
Chemistry, Multidisciplinary
Xuekang Yang, Jiawei Lv, Jing Zhang, Tianxi Shen, Tingyang Xing, Fenglian Qi, Shaohua Ma, Xiaoqing Gao, Wei Zhang, Zhiyong Tang
Summary: This paper describes a new approach to obtain intense and tunable circularly polarized luminescence (CPL) by doping semiconductor quantum dots into inorganic chiral photonic crystals (CPCs). The sign, position, and intensity of CPL peaks can be precisely controlled by manipulating the photonic band gap of CPCs or the luminescence wavelength of quantum dots.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Multidisciplinary
Yuwei Sun, Zhipeng Hu, Kezhang Shi, Tingbiao Guo, Yuxin Xing, Yi Jin, Sailing He
Summary: Scientists demonstrate a resonant planar chiral dielectric metasurface design for circularly polarized emission (CPE). The design is easy to fabricate, with an extremely high and angle-insensitive far-field circular polarization degree. Experimental results show a 57-fold enhancement in photoluminescence from a thin film of PbS/CdS quantum dots coated on the metasurface, with a far-field degree of circular polarization as high as 0.74.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chang-Chun Fan, Xiang-Bin Han, Bei-Dou Liang, Chao Shi, Le-Ping Miao, Chao-Yang Chai, Cheng-Dong Liu, Qiong Ye, Wen Zhang
Summary: A pair of 2D chiral perovskite ferroelectrics with enhanced CPL detection performance have been reported in this study, achieved through the chirality-transfer-induced chiral&polar ferroelectric phase.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Qingqian Wang, Hongmei Zhu, Wei Chen, Junjie Hao, Zhaojin Wang, Jun Tang, Yingguo Yang, Xiao Wei Sun, Dan Wu, Kai Wang
Summary: This study proposes an effective strategy to achieve high CPL activity in quantum dots by introducing 2D chiral perovskite as a chiral source, providing spin polarized carriers through the CISS effect. The as-synthesized QDs/CP composites exhibit dissymmetry factors (g(lum)) up to 9.06 x 10(-3). These findings provide a useful method to achieve CPL in QDs/2D chiral perovskite heterojunctions, which could be promising in spin-optoelectronics application.
Article
Chemistry, Applied
Minglin Shi, Xiaoyong Chang, Wei Lu
Summary: A series of planar chiral macrocyclic compounds derived from [2.2]-paracyclophane scaffold and helicenes were synthesized and found to exhibit efficient circularly polarized emission. These compounds and helicenes were used as activators in peroxyoxalate chemiluminescence. Compound 2R, which contained electron-donating dimethylamino groups and had the lowest oxidation potential, showed the highest chemiluminescence quantum yield of 0.21% (higher than 0.17% for 9,10-diphenylanthracene at a concentration of 1.0 x 10-4 mol dm-3). Significant circularly polarized chemiluminescence with dissymmetry factors (|gCL|) ranging from 1.4 x 10-3 to 5.4 x 10-3 was observed for these chiral chemiluminescent activators.
Article
Physics, Applied
A. A. Maksimov, E. Filatov, I. I. Tartakovskii, V. D. Kulakovskii, S. G. Tikhodeev, C. Schneider, S. Hoefling
Summary: Engineering the chirality of optical microcavities is a central concept in modern photonics. We demonstrate a compact source of coherent radiation based on an electrically driven, chiral semiconductor microcavity. The device can produce circularly polarized light with polarization exceeding 90% and the direction of polarization can be controlled by the handedness of the chiral photonic crystal slab.
PHYSICAL REVIEW APPLIED
(2022)
Article
Neurosciences
Branduff McAllister, Jasmine Donaldson, Caroline S. Binda, Sophie Powell, Uroosa Chughtai, Gareth Edwards, Joseph Stone, Sergey Lobanov, Linda Elliston, Laura-Nadine Schuhmacher, Elliott Rees, Georgina Menzies, Marc Ciosi, Alastair Maxwell, Michael J. Chao, Eun Pyo Hong, Diane Lucente, Vanessa Wheeler, Jong-Min Lee, Marcy E. MacDonald, Jeffrey D. Long, Elizabeth H. Aylward, G. Bernhard Landwehrmeyer, Anne E. Rosser, Jane S. Paulsen, Nigel M. Williams, James F. Gusella, Darren G. Monckton, Nicholas D. Allen, Peter Holmans, Lesley Jones, Thomas H. Massey
Summary: This study identifies rare coding variants associated with clinical effects in Huntington's disease (HD) using exome sequencing. Damaging coding variants in candidate modifier genes associated with altered HD onset or severity were discovered. FAN1 nuclease activity slows CAG expansion and is associated with later onset of HD.
NATURE NEUROSCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Andreas Pfenning, Sebastian Krueger, Fauzia Jabeen, Lukas Worschech, Fabian Hartmann, Sven Hoefling
Summary: Optical quantum information science and technologies require the ability to generate, control, and detect single or multiple quanta of light. Superconducting nanowire single-photon detectors and single-photon avalanche diodes are currently the top performers in this field, but other promising devices are emerging. This review article focuses on a specific alternative single-photon detector - the resonant tunneling diode - and discusses its advantages, limitations, and potential improvements.
Article
Optics
Josephine Nauschuetz, Hedwig Knoetig, Robert Weih, Julian Scheuermann, Johannes Koeth, Sven Hoefling, Benedikt Schwarz
Summary: This article presents GaSb-based interband cascade lasers (ICLs) operating at a center wavelength of 6.12 μm in continuous-wave mode up to a maximum temperature of 40 °C. The performance of the devices is improved by adjusting the Ga1-xInxSb layer thickness in the active region to reduce valence intersubband absorption. The optimization of the device design and electron injector rebalances the electron and hole concentrations, resulting in low threshold current densities and power consumption, making them suitable for mobile and compact sensing systems.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Jonathan Jurkat, Sebastian Klembt, Marco De Gregorio, Moritz Meinecke, Quirin Buchinger, Tristan H. Harder, Johannes Beierlein, Oleg A. Egorov, Monika Emmerling, Constantin Krause, Christian Schneider, Tobias Huber-Loyola, Sven Hoefling
Summary: The introduction of topological physics to photonics has resulted in the development of robust photonic devices. While classical topological protection of light has been achieved, the utilization of quantum light sources in devices with topologically nontrivial resonances remains largely unexplored.
Article
Engineering, Electrical & Electronic
Nikolai B. Chichkov, Amit Yadav, Franck Joulain, Solenn Cozic, Semyon V. Smirnov, Leon Shterengas, Julian Scheuermann, Robert Weih, Johannes Koeth, Sven Hofling, Ulf Hinze, Samuel Poulain, Edik U. Rafailov
Summary: Building upon recent advances in GaSb-based diode lasers and Er-doped fluoride fibre technologies, this article demonstrates the fibre-based amplification of mid infrared diode lasers around 2.78 μm for the first time. The experimental results show output powers up to 0.9 W, pulse durations as short as 20 ns, and pulse repetition rates up to 1 MHz. Additionally, the impact of different fibre end-cap materials on laser performance is analyzed.
IEEE PHOTONICS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Michael D. Fraser, H. Hoe Tan, Yago del Valle Inclan Redondo, Hima Kavuri, Elena A. Ostrovskaya, Christian Schneider, Sven Hoefling, Yoshihisa Yamamoto, Seigo Tarucha
Summary: The use of high energy proton implantation allows for precise and independent manipulation of both exciton and photon energies in GaAs microcavity exciton-polaritons. This technique involves post-growth proton implantation and annealing steps to induce small local interdiffusion, resulting in energy shifts in exciton or photon components. The polariton mode can be tuned by more than 10 meV, altering the effective mass for photon and exciton energy shifts, while maintaining narrow-linewidth polariton emission and condensation.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Mario Hentschel, Kirill Koshelev, Florian Sterl, Steffen Both, Julian Karst, Lida Shamsafar, Thomas Weiss, Yuri Kivshar, Harald Giessen
Summary: Manipulating light on the nanoscale requires resonant light confinement, which is often restricted by the dispersion and loss of metals and dielectrics. However, this study presents a novel strategy for dielectric nanophotonics by achieving resonant subwavelength localized confinement of light in air. The experiments demonstrate the exceptional optical properties of voids created in high-index dielectric host materials, which offer bright and intense colors for nanoscale color printing and expand the parameter space for the design of metasurfaces and other micro- and nanoscale optical elements.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Physics, Applied
Quirin Buchinger, Simon Betzold, Sven Hoefling, Tobias Huber-Loyola
Summary: We conducted an optical study on various device designs of electrically contactable circular Bragg grating cavities in labyrinth geometries. In order to establish an electrical connection between the central disk and the surrounding membrane, we introduced connections between the adjacent rings separated by air gaps. By rotating these connections to create a labyrinth-like structure, we improved mode confinement, far-field pattern, and Purcell factor compared to layouts with connections arranged in straight lines. Reflectivity measurements and simulations were conducted to investigate the effects of different arrangements and sizes of connections on the optical properties and to determine the optimal design.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Bing Liu, Tim Wagner, Stefan Enzner, Philipp Eck, Martin Kamp, Giorgio Sangiovanni, Ralph Claessen
Summary: By synthesizing ultrathin Sb films on semi-insulating InSb(111)A substrate, researchers observe a pronounced moire pattern on the Sb films and confirm experimentally that the topological surface state persists and shifts toward lower binding energies with a decrease in Sb thickness, in agreement with theoretical predictions.
Article
Chemistry, Multidisciplinary
Yago del Valle-Inclan Redondo, Christian Schneider, Sebastian Klembt, Sven Hoefling, Seigo Tarucha, Michael D. Fraser
Summary: We have created a rotating polariton condensate at gigahertz frequencies by off-resonantly pumping with a rotating optical stirrer composed of structured laser modes. The results show that the rotating polariton condensate acquires angular momentum exceeding the critical 1n/particle and demonstrates deterministic nucleation and capture of quantized vortices with a handedness controlled by the pump rotation direction. This study enables new opportunities for exploring open dissipative superfluidity, ordering of non-Hermitian quantized vortex matter, and topological states in a highly nonlinear, photonic platform.
Article
Physics, Multidisciplinary
Carolin Lueders, Matthias Pukrop, Franziska Barkhausen, Elena Rozas, Christian Schneider, Sven Hoefling, Jan Sperling, Stefan Schumacher, Marc Assmann
Summary: We have developed a novel phase-space method to dynamically monitor quantum coherence in polariton condensates. Our approach allows us to quantify complex decoherence mechanisms and provides a stable system for long-term coherence. By reconstructing phase-space functions from homodyne detection data, we have demonstrated the potential of using quantum coherence for information processing up to the nanosecond regime.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Adria Canos Valero, Hadi K. Shamkhi, Anton S. Kupriianov, Thomas Weiss, Alexander A. Pavlov, Dmitrii Redka, Vjaceslavs Bobrovs, Yuri Kivshar, Alexander S. Shalin
Summary: The authors demonstrate a super dipole resonance that arises from interfering resonant modes in the scattering of light by small particles. They study the Mie-like scattering from a subwavelength resonator made of a high-index dielectric material and uncover a novel mechanism of superscattering linked to bound states in the continuum. They develop a non-Hermitian model to describe interfering resonances and confirm their findings through a scattering experiment.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Sergey A. Dyakov, Ilia M. Fradkin, Dmitry Yurasov, Vladimir A. Zinovyev, Sergei G. Tikhodeev, Nikolay A. Gippius
Summary: We present the theoretical studies on the Purcell effect in infinite photonic crystal slabs without defects or cavities. By placing the dipoles in the hot spots of modes with the zero group velocity, the Purcell factor can be greatly enhanced. This effect is associated with Van Hove singularities.
Article
Physics, Multidisciplinary
Chris Gustin, Lukasz Dusanowski, Sven Hofling, Stephen Hughes
Summary: We describe the use of a coherent optical drive near resonance with the upper rungs of a three-level ladder system, combined with short-pulse excitation, to provide a frequency-tunable source of on-demand single photons. We identify two device operation regimes and show how negative effects can be mitigated by using an optical cavity to increase the collection rate of photons. We apply our theory to semiconductor quantum dots and find that high indistinguishabilities of over 90% are achievable.
PHYSICAL REVIEW RESEARCH
(2022)
