Article
Chemistry, Multidisciplinary
Chuying Ye, Jiawei Jiang, Shaolan Zou, Wenbo Mi, Yin Xiao
Summary: We developed type-II core-shell nanocrystals with a chiral low-dimensional perovskite shell and an achiral 3D MAPbBr(3) core. The core-shell nanocrystals exhibit spin-polarized luminescence and circularly polarized luminescence, which is controlled by the chiral-induced spin selectivity (CISS) effect. The spin-polarized light-emitting diode (spin-LED) also achieved circularly polarized electroluminescence under ambient conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Optics
Shan Xiao, Shiyao Wu, Xin Xie, Jingnan Yang, Wenqi Wei, Shushu Shi, Feilong Song, Jianchen Dang, Sibai Sun, Longlong Yang, Yunuan Wang, Sai Yan, Zhanchun Zuo, Ting Wang, Jianjun Zhang, Kuijuan Jin, Xiulai Xu
Summary: Chiral quantum optics has attracted interest in the field of quantum information science. By exploiting spin-polarization properties and engineering rational photonic nanostructures, information can be transformed in compact chiral photonic circuits with deterministic circularly polarized chiral routing and beamsplitting.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Sonia Maniappan, Kumbam Lingeshwar Reddy, Jatish Kumar
Summary: This study reports a simple synthetic approach for preparing intrinsically chiral carbon nanodots and reveals their optical properties. These carbon nanodots can be used as chiral light emitting agents, showing potential applications in optical devices, data storage, and security tags.
Article
Optics
S. S. Hou, Y. Liu, W. X. Zhang, X. D. Zhang
Summary: Chiral separation is a crucial step in chemical synthesis processes, and a novel method using dielectric photonic crystal slabs has been proposed to achieve separation and trapping of enantiomers. The method shows extreme enhancement of chiral optical forces compared to circularly polarized lights, providing a reference for realizing all-optical enantiopure syntheses.
Article
Chemistry, Multidisciplinary
Guangmin Li, Xihao Zhang, Xuening Fei, Jiafeng Li, Hongfei Liu, Wei Liu, Yang Yang, Bingjing Li, Mingrui Liu, Gaoling Yang, Ti Zhang
Summary: In this study, chiral ligand-conjugated quantum dots were fabricated for inducing apoptosis in cancer cells. The circular dichroism signals of chiral quantum dots were found to effectively distinguish cancer cells from normal cells. The experimental results demonstrated the significant apoptosis-inducing ability of the chiral quantum dots and their potential as targeted anti-cancer agents.
Article
Optics
Ananya Das, Evgeny Kundelev, Anna A. Vedernikova, Sergei A. Cherevkov, Denis Danilov, Aleksandra Koroleva, Evgeniy Zhizhin, Anton N. Tsypkin, Aleksandr P. Litvin, Alexander Baranov, Anatoly Fedorov, Elena Ushakova, Andrey L. Rogach
Summary: Carbon dots are promising nanoparticles for biology and medicine applications due to their easy fabrication, biocompatibility, and attractive optical properties. The researchers successfully synthesized chiral carbon dots using a one-step hydrothermal method, which exhibited high photoluminescence quantum yields, chiral optical signals, and stable optical characteristics. These chiral carbon dots have potential for various bio-applications.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Mujahid Mustaqeem, Pi-Tai Chou, Saqib Kamal, Naveed Ahmad, Jia-Yu Lin, Yu-Jung Lu, Xing-Hao Lee, Kung-Hsuan Lin, Kuang-Lieh Lu, Yang-Fang Chen
Summary: Spin optoelectronics is crucial for the future development of spintronics. A new approach based on quantum dots/chiral metal-organic framework heterojunction has been proposed to achieve spin-polarized LEDs at room temperature without using ferromagnetic contacts or magnetic fields. This method provides a general methodology for generating spin optoelectronic devices that have not yet been realized.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jiaqi Guo, Fan Wu, Gang Song, Yuming Huang, Rongzhen Jiao, Li Yu
Summary: The study experimentally measured the spectra of plexcitonic hybrids and investigated the chirality of J-aggregates assembled on the surface of nanoparticles, revealing that the chirality of J-aggregates is related to the position on the nanorods and the quantity of dye molecules. The interaction between the longitudinal localized surface plasmon resonance (LLSPR) of the nanorods and J-aggregates achieved the strong coupling regime, leading to Rabi splitting observation.
Article
Optics
Qian Wei, Jiaju Wu, Zhiwei Guo, Xiaotian Xu, Ke Xu, Yong Sun, Yunhui Li, Haitao Jiang, Hong Chen
Summary: Investigation into the manipulation of PBGs for circular polarization waves is conducted, proposing 1DPCs containing anisotropic chiral metamaterials to design arbitrary PBGs for LCP wave, while PBGs for RCP wave remain blue-shifted, extending the manipulation of PBGs for circular polarization waves with potential applications.
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
Optics
Kazuhiro Kuruma, Hironobu Yoshimi, Yasutomo Ota, Ryota Katsumi, Masahiro Kakuda, Yasuhiko Arakawa, Satoshi Iwamoto
Summary: This study reports single-photon sources using single quantum dots embedded in topological slow light waveguides based on valley photonic crystals. The experiment demonstrates Purcell-enhanced single-photon emission in a topological slow light mode with a group index over 20, showing robust propagation even under sharp bends.
LASER & PHOTONICS REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Joel Q. Grim, Ian Welland, Samuel G. Carter, Allan S. Bracker, Andrew Yeats, Chul Soo Kim, Mijin Kim, Kha Tran, Igor Vurgaftman, Thomas L. Reinecke
Summary: We demonstrate the scattering of laser light from two InAs quantum dots coupled to a photonic crystal waveguide by strain-tuning the optical transitions of the dots into mutual resonance. The nonlinearity is enhanced by scattering laser light from two dots, providing a means of manipulating few-photon optical nonlinearities. This approach also establishes opportunities for multiemitter quantum optics in a solid-state platform.
Article
Chemistry, Physical
Tao Liu, Ho-Kei Chan, Duanduan Wan
Summary: Inspired by recent developments in self-assembled chiral nanostructures, this study explores the possibility of using spherical particles packed in cylinders as building blocks for chiral photonic crystals. Despite the non-chirality of the spheres and cylinders, the self-assembled system can exhibit chirality due to spontaneous symmetry breaking. The study found that the system can display dual-polarization photonic band gaps for circularly polarized light, and the size of the polarization band gap depends on the dielectric constant of the spheres and the packing fraction of the cylinders. Furthermore, the polarization gap persists even in the presence of imperfections and heterogeneity.
Article
Physics, Applied
Alexandre Belsley, Jonathan C. F. Matthews
Summary: The concentration of a chiral solution is a key parameter that can be estimated to high precision using circular birefringence or circular dichroism. By using the quantum Fisher information formalism, researchers have found that bright-polarization squeezed state probes provide a quantum advantage over classical strategies, resulting in four-fold precision enhancement.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jingcong Hu, Chenghao Bi, Xuetao Zhang, Yue Lu, Wencai Zhou, Zilong Zheng, Ying Tang, Feng Lu, Zhiwei Yao, Bohai Tian, Xiaoyong Wang, Karuppaiah Selvakumar, Jianjun Tian, Manling Sui
Summary: Reducing the dimensionality of metal halide perovskite into two-dimensional or one-dimensional nanostructures expands its spectral absorption or emission range. This study successfully synthesized one-dimensional OA-CsPbI3 nanowires, which exhibit monochromatic yellow light emission and high photoluminescence quantum yield.
APPLIED MATERIALS TODAY
(2022)
Editorial Material
Physics, Applied
Christoph Becher, Sven Hoefling, Jin Liu, Peter Michler, Wolfram Pernice, Costanza Toninelli
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Lukasz Dusanowski, Cornelius Nawrath, Simone L. Portalupi, Michael Jetter, Tobias Huber, Sebastian Klembt, Peter Michler, Sven Hoefling
Summary: This study demonstrates a solid-state spin-qubit platform based on a hole confined in a semiconductor quantum dot that emits telecom-band photons. The researchers showcase the control and manipulation of the hole, enabling its use in long-distance quantum communication. This work is significant for the development of solid-state quantum emitters compatible with existing optical fiber networks.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
M. Burakowski, P. Mrowinski, M. Gawelczyk, J. P. Reithmaier, S. Hoefling, G. Sek
Summary: The properties of excitons, electrons, and holes in single InAs/InP asymmetric quantum dots were studied experimentally and theoretically, and it was found that they have high stability and potential for generating entangled photons.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Marcin Syperek, Raul Stuhler, Armando Consiglio, Pawel Holewa, Pawel Wyborski, Lukasz Dusanowski, Felix Reis, Sven Hofling, Ronny Thomale, Werner Hanke, Ralph Claessen, Domenico Di Sante, Christian Schneider
Summary: The optical spectroscopy of ultimately thin materials has greatly benefited our understanding of collective excitations in low-dimensional semiconductors. The authors of this study report the observation of room temperature excitons in a single layer of bismuth atoms epitaxially grown on a SiC substrate, a material with non-trivial global topology. These excitonic and topological physics arise from the same electronic structure.
NATURE COMMUNICATIONS
(2022)
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.