Article
Multidisciplinary Sciences
Young-Hoon Kim, Yaxin Zhai, Haipeng Lu, Xin Pan, Chuanxiao Xiao, E. Ashley Gaulding, Steven P. Harvey, Joseph J. Berry, Zeev Valy Vardeny, Joseph M. Luther, Matthew C. Beard
Summary: Traditional optoelectronic approaches rely on both electrical and magnetic fields to control spin, charge, and light, while the use of chiral-induced spin selectivity (CISS) technology allows for the fabrication of a spin-LED that operates at room temperature without the need for magnetic fields or ferromagnetic contacts.
Article
Chemistry, Multidisciplinary
Marco Dusel, Simon Betzold, Tristan H. Harder, Monika Emmerling, Johannes Beierlein, Juergen Ohmer, Utz Fischer, Ronny Thomale, Christian Schneider, Sven Hofling, Sebastian Klembt
Summary: This study demonstrates exciton-polariton lasing for topological defects at room temperature, using red fluorescent protein and a patterned mirror cavity. The results pave the way for exploring interacting boson many-body physics under ambient conditions.
Article
Nanoscience & Nanotechnology
Yaqi Wang, Huying Zheng, Ziying Tang, Runchen Wang, Xin Luo, Yan Shen, Xun Yang, Kai-Kai Liu, Shuangpeng Wang, Shaozhi Deng, Chong-Xin Shan, Hai Zhu
Summary: In this study, we report a chiral polariton laser achieved through spin-polarization of polariton condensation at room temperature. The chiral behavior of the microcavity breaks spatial inversion symmetry and lifts the energy degeneracy of polariton spin doublets by 11 meV. The polariton laser exhibits stable right-circular polarization due to bosonic condensation occurring only in low-energy spin-up polaritons.
Article
Materials Science, Multidisciplinary
E. A. Amargianitakis, K. Tsagaraki, A. Kostopoulos, G. Konstantinidis, E. Delamadeleine, E. Monroy, N. T. Pelekanos
Summary: This study demonstrates room temperature polariton lasing in an all-dielectric microcavity with non-polar III-nitride quantum wells as active media. The microcavity fabrication method involves detaching an optimally grown III-nitride active region from the substrate and inserting it between distributed Bragg reflectors. The produced microcavities exhibit closely spaced polarization-resolved lower polariton branches, with polariton lasing observed at a lower threshold compared to previous technology levels.
Article
Chemistry, Multidisciplinary
Jiaxin Zhao, Rui Su, Antonio Fieramosca, Weijie Zhao, Wei Du, Xue Liu, Carole Diederichs, Daniele Sanvitto, Timothy C. H. Liew, Qihua Xiong
Summary: This study reports the realization of polariton lasing in a TMD microcavity at room temperature for the first time, showing evidence of continuous wave pumped polariton lasing through macroscopic occupation of the ground state, emergence of temporal coherence, presence of an exciton fraction-controlled threshold, and buildup of linear polarization. This work represents a critical step towards utilizing nonlinear polariton-polariton interactions and providing a new platform for thresholdless lasing.
Article
Physics, Multidisciplinary
Fabio Scafirimuto, Darius Urbonas, Michael A. Becker, Ullrich Scherf, Rainer F. Mahrt, Thilo Stoeferle
Summary: Microcavities with embedded optically active materials allow for the creation of exciton-polariton condensates in the regime of strong light-matter interaction. The authors demonstrate room temperature polariton condensation in a nano-fabricated two-dimensional Lieb lattice with an organic polymer. This study shows the potential for investigating extended topological polariton systems under ambient conditions.
COMMUNICATIONS PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Shunhua Hu, Wei Liu, Lidan Guo, Rui Zhang, Xianrong Gu, Ke Meng, Yang Qin, Ankang Guo, Tingting Yang, Cheng Zhang, Xueli Yang, Shuhang Lu, Meng Wu, Kun Lu, Ting Tan, Erjun Zhou, Zhixiang Wei, Xiangnan Sun
Summary: In this study, an innovative spin-filtering-competition mechanism is proposed to continuously modulate the interfacial effect in molecular spin valves at room temperature. By precisely controlling lithium fluoride coverage on the cobalt surface, continuous modulation of the spin-injection process can be successfully achieved, allowing active control of spin polarization of the injected current and magnetoresistance effect.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Kai Peng, Renjie Tao, Louis Haeberle, Quanwei Li, Dafei Jin, Graham R. Fleming, Stephane Kena-Cohen, Xiang Zhang, Wei Bao
Summary: In this study, a series of quantum fluid phase transitions from classical fluids to superfluids and supersonic fluids were observed in halide perovskite single crystals at room temperature. This provides a foundation for exploring non-equilibrium quantum fluid many-body physics at room temperature.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Peter Foldesy, Imre Janoki, Adam Nagy, Mate Siket, Akos Zarandy
Summary: This study demonstrates a method for determining the temperature of a photodiode while preserving its original purpose through a simple electrical measurement process and optical calibration method. The technique allows for tracking the temperature inside the package with better temporal resolution and accuracy compared to off-the-shelf external heat sink sensors.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Physics, Multidisciplinary
Fei Chen, Hui Li, Hang Zhou, Song Luo, Zheng Sun, Ziyu Ye, Fenghao Sun, Jiawei Wang, Yuanlin Zheng, Xianfeng Chen, Huailiang Xu, Hongxing Xu, Tim Byrnes, Zhanghai Chen, Jian Wu
Summary: In this paper, a room temperature ultrafast polaritonic switch is realized, where the population of Bose-Einstein condensate can be depleted and revived using an ultrashort optical control pulse. The erasure and revival of the polariton condensates can be visualized using femtosecond angle-resolved spectroscopic imaging technique.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Andreas Gottscholl, Matthias Diez, Victor Soltamov, Christian Kasper, Andreas Sperlich, Mehran Kianinia, Carlo Bradac, Igor Aharonovich, Vladimir Dyakonov
Summary: The research team successfully realized coherent control of ensembles of boron vacancy centers in hexagonal boron nitride (hBN) and measured the spin characteristics at different temperatures. They proposed a method to substantially reduce the magnetic resonance linewidth, providing important insights for the employment of van der Waals materials in quantum technologies.
Review
Quantum Science & Technology
HeeBong Yang, Na Young Kim
Summary: Microcavity exciton-polaritons are quantum quasi-particles resulting from strong light-matter coupling. They have attracted significant interest due to their potential applications in photonic devices and exploration of quantum phenomena. This review focuses on the spins and anisotropic interactions of microcavity exciton-polaritons, as well as the extraordinary quantum phenomena and novel spin-based photonic devices based on them.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Chemistry, Inorganic & Nuclear
Nicolas Montenegro-Pohlhammer, Rocio Sanchez-de-Armas, Carmen J. Calzado, Merlys Borges-Martinez, Gloria Cardenas-Jiron
Summary: The study demonstrates that NiTP-PAPy strongly adsorbs on the Au(111) surface in both high spin and low spin configurations, and the photoinduced switching is preserved upon adsorption. DFT-NEGF calculations indicate that the current passing through the molecular junction-like systems is much higher in the high spin configuration, and the current in the ferromagnetic junction is highly spin-polarized.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
L. Pickup, J. D. Topfer, H. Sigurdsson, P. G. Lagoudakis
Summary: In semiconductor microcavities, we demonstrate spin-polarized jets in extended systems of ballistic exciton-polariton condensates using optical nonresonant excitation geometries. The structure of the spin jets is determined by the spatially patterned degree of circular polarization of the nonresonant excitation laser. Laser excitation, strong particle interactions, and spin relaxation result in a tunable spin-dependent potential landscape for polaritons, leading to intricate polarization patterns through coherent matter-wave interference.
Article
Materials Science, Multidisciplinary
Fei Chen, Hang Zhou, Ziyu Ye, Song Luo, Zheng Sun, Yuanlin Zheng, Xianfeng Chen, Huailiang Xu, Hongxing Xu, Tim Byrnes, Hui Li, Zhanghai Chen, Jian Wu
Summary: This study visualizes the ultrafast buildup dynamics of room-temperature polariton condensation in a ZnO whispering gallery mode microcavity using the femtosecond angle-resolved spectroscopic imaging technique. The experimental observations are in quantitative agreement with the simulation results, which suggest that the scattering from exciton reservoir to lower polariton branches and the decay from these branches dominate the buildup process.
Article
Materials Science, Multidisciplinary
Vasily Kravtsov, Tatiana Ivanova, Artem N. Abramov, Polina Shilina, Pavel O. Kapralov, Dmitry N. Krizhanovskii, Vladimir N. Berzhansky, Vladimir Belotelov, Ivan A. Shelykh, Alexander Chernov, Ivan Iorsh
Summary: Interfacing atomically thin van der Waals semiconductors with magnetic substrates provides additional control on their intrinsic valley degree of freedom. The results of this study establish monolayer MoSe2 interfaced with ferrimagnetic bismuth iron garnet as a promising system for valley control of charged excitons.
Article
Physics, Multidisciplinary
Daria Zvyagintseva, Helgi Sigurdsson, Valerii K. Kozin, Ivan Iorsh, Ivan A. Shelykh, Vladimir Ulyantsev, Oleksandr Kyriienko
Summary: In this study, an unsupervised machine learning approach is used to map the phases of a polariton condensate lattice and classify unique polarization patterns. By applying machine learning methods, we can gain a better understanding of the non-equilibrium nature of exciton-polariton condensates and the qualitative changes in their steady states.
COMMUNICATIONS PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Tarni Aggarwal, Ankit Udai, Pratim K. Saha, Swaroop Ganguly, Pallab Bhattacharya, Dipankar Saha
Summary: Efficiency droop at high carrier-injection regimes is a concern in InGaN/GaN quantum-confined hetero-structure-based light-emitting diodes (LEDs). This study demonstrates a potential solution through the positive effects from an optical cavity in suppressing the Auger recombination rate and highlights its technological importance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Araghni Bhattacharya, Satyajit Mahata, Ashutosh Bandyopadhyay, Biman B. Mandal, Vadivelu Manivannan
Summary: The molecule 2,4,5-tris(2-pyridyl)imidazole (L) has been evaluated as a probe for dual sensing of Hg2+ and Cu2+ ions. It shows a sensitive and selective response in the presence of both ions and can detect them in specific pH ranges. The probe's detection limit for Cu2+ is below the allowable limit prescribed by the United States Environmental Protection Agency. Experimental observations are supported by calculations and cell imaging studies.
Article
Multidisciplinary Sciences
Hangyong Shan, Ivan Iorsh, Bo Han, Christoph Rupprecht, Heiko Knopf, Falk Eilenberger, Martin Esmann, Kentaro Yumigeta, Kenji Watanabe, Takashi Taniguchi, Sebastian Klembt, Sven Hoefling, Sefaattin Tongay, Carlos Anton-Solanas, Ivan A. Shelykh, Christian Schneider
Summary: Engineering the properties of quantum materials via strong light-matter coupling is an important direction of research with diverse modern applications. This study demonstrates the brightening of dark excitons in a monolayer of WSe2 through strong coupling, preventing the commonly observed photoluminescence quenching.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
A. D. Belogur, D. A. Baghdasaryan, I. V. Iorsh, I. A. Shelykh, V. Shahnazaryan
Summary: We present a quantitative study of the nonlinear optical response of layered perovskites and find that the peculiar form of the interaction potential in these materials results in a dominant contribution of the Rabi splitting quench effect in the nonlinear optical response.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
D. A. Baghdasaryan, E. S. Hakobyan, D. B. Hayrapetyan, I. V. Iorsh, I. A. Shelykh, V. Shahnazaryan
Summary: This study theoretically investigates the excitonic nonlinearity in hybrid organic-inorganic Ruddlesden-Popper perovskite thin films, and experimentally demonstrates the effect of a transverse electric field.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Wei Luo, Sharif Md. Sadaf, Tashfiq Ahmed, Md Zunaid Baten, Md Omar Faruque, Md Arif Hossain, Houjin Wang, Yongde Li, Ye Yuan, Weiyun Wang, Shangfeng Liu, Tai Li, Qi Wang, Junjie Kang, Xinqiang Wang
Summary: This study demonstrates that the use of hexagonal nanopatterned sapphire substrates and inclined Al reflectors can improve the external quantum efficiency and light extraction efficiency of AlGaN-based deep-ultraviolet LEDs, leading to significant enhancements in light output power and efficiency.
Article
Engineering, Electrical & Electronic
Joel Tan, Jia Hao Lim, Bejoy Sikder, Md. Zunaid Baten, Jae Hyun Kwon, Kazutaka Yamane, Vinayak Bharat Naik, Nagarajan Raghavan, Kin Leong Pey
Summary: This study investigates the influence of voltage stress on the TDDB lifetime of ultrathin MgO and reveals different lifetime behaviors for positive and negative modes as well as a unique bimodal behavior in the bipolar mode. The role of additional driving forces, such as current, self-heating, charge trapping, and interface strain, in the breakdown mechanism is also discussed.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Physics, Applied
Yuanpeng Wu, Ping Wang, Woncheol Lee, Anthony Aiello, Parag Deotare, Theodore Norris, Pallab Bhattacharya, Mackillo Kira, Emmanouil Kioupakis, Zetian Mi
Summary: Both 2D TMDs and III-V semiconductors are potential platforms for quantum technology, but each with its limitations. 2D TMDs have a large exciton binding energy and customizable quantum properties, but compatibility issues with existing industrial processes. On the other hand, III-nitrides have been widely used in light-emitting devices and power electronics but lack exploitation of excitonic quantum aspects. Recent advancements in 2D III-nitrides have shown promise in achieving room-temperature quantum technologies.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Georgy Ermolaev, Anatoly P. Pushkarev, Alexey Zhizhchenko, Aleksandr A. Kuchmizhak, Ivan Iorsh, Ivan Kruglov, Arslan Mazitov, Arthur Ishteev, Kamilla Konstantinova, Danila Saranin, Aleksandr Slavich, Dusan Stosic, Elena S. Zhukova, Gleb Tselikov, Aldo Di Carlo, Aleksey Arsenin, Kostya S. Novoselov, Sergey Makarov, Valentyn S. Volkov
Summary: In recent years, the significance of giant optical anisotropy in light manipulation has been demonstrated. However, achieving continuous tunability of optical anisotropy has remained a challenge. This study presents a solution to this problem through the chemical alteration of halogen atoms in single-crystal halide perovskites, resulting in the continuous modification of optical anisotropy. Our findings also show that halide perovskites can exhibit high optical anisotropy up to 0.6 in the visible range, the highest value among non-van der Waals materials.
Article
Nanoscience & Nanotechnology
Alexey Mikhin, Anton Shubnic, Tatiana Ivanova, Ivan Shelykh, Anton K. Samusev, Ivan Iorsh
Summary: This study shows that bulk rhenium diselenide, ReSe2, has a record high refractive index of over 5 in the near-infrared frequency range. Back focal plane reflection spectroscopy is used to extract the components of ReSe2's permittivity tensor and reveal its extreme biaxial anisotropy. The experimental data is in good agreement with the predictions of density functional theory. The combination of a large refractive index and giant optical anisotropy makes ReSe2 a promising material for all-dielectric nanophotonics in the near-infrared frequency range.
Article
Multidisciplinary Sciences
Artem N. Abramov, Igor Y. Chestnov, Ekaterina S. Alimova, Tatiana Ivanova, Ivan S. Mukhin, Dmitry N. Krizhanovskii, Ivan A. Shelykh, Ivan V. Iorsh, Vasily Kravtsov
Summary: By using local deformation of monolayer WSe2, we have successfully created high-purity single-photon emitters. Through nanoindentation and atomic force microscopy, we have identified the single-photon emitting sites and reconstructed the details of the surrounding local strain potential. The experimental results suggest that the single-photon emission is likely due to strain-induced spectral shift of dark excitonic states and their hybridization with localized states of individual defects.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
F. A. Benimetskiy, A. Yulin, A. O. Mikhin, V Kravtsov, I. Iorsh, M. S. Skolnick, I. A. Shelykh, D. N. Krizhanovskii, A. K. Samusev
Summary: Recently reported large values of exciton-polariton nonlinearity of transition metal dichalcogenide (TMD) monolayers coupled to optically resonant structures approach the values characteristic for GaAs-based systems in the regime of strong light-matter coupling. Contrary to the latter, TMD-based polaritonic devices remain operational at ambient conditions and therefore have greater potential for practical nanophotonic applications.
Article
Materials Science, Multidisciplinary
G. Rakhmanova, A. Osipov, D. Ilyin, I Shushakova, I. A. Ado, I. Iorsh, M. Titov
Summary: The indirect quartic interaction of spins is suggested to play a crucial role in the stability of magnetic textures and formation of magnetic spirals in two-dimensional magnets. This interaction can be manipulated by an external magnetic field.
