Article
Physics, Multidisciplinary
A. Camacho-Guardian, N. R. Cooper
Summary: Moire excitons, in the presence of cavity photons, exhibit a rich phase diagram with pronounced bistabilities reflecting strong interexciton interactions. The system can realize single- and multiphoton lasers with the presence of incoherent pumping of excitons.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Kyriacos Georgiou, Rahul Jayaprakash, Andreas Othonos, David G. Lidzey
Summary: This study investigates polariton-mediated energy transfer between coupled states in strong-coupled microcavities over mesoscopic distances. By separating thin-films of two J-aggregated molecular dyes with a spacer layer up to 2 micrometers thick, strong light-matter coupling and hybridisation between excitonic transitions were identified. The process of energy transfer through polaritons was found to be enhanced compared to non-cavity control structures.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Valentin Walther, Lida Zhang, Susanne F. Yelin, Thomas Pohl
Summary: Excitons in a semiconductor monolayer can reflect resonant light with high efficiency, and this study investigates the nonlinear optical properties of these excitonic mirrors. The research shows that interactions between excitons can generate highly nonclassical light, with two different scenarios described. The findings suggest promising applications in quantum photonics at the individual photon level.
Article
Multidisciplinary Sciences
Liheng Zheng, Zhixin Liu, Donglin Liu, Xingguo Wang, Yu Li, Meiling Jiang, Feng Lin, Han Zhang, Bo Shen, Xing Zhu, Yongji Gong, Zheyu Fang
Summary: The valley pseudospin in transition metal dichalcogenides monolayers offers additional possibilities for controlling valley carriers, impacting valleytronics significantly. By exciting and controlling valley polarization, effective manipulation of the degree of valley polarization can be achieved. This method provides exciting opportunities for deep-subwavelength valleytronics research and optoelectronic circuit integration.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Miao-Qing Wang, You-Zeng Hao, Zhen-Ning Zhang, Bin Zhang, Yue-De Yang, Jin-Long Xiao, Antonio L. Teixeira, Yong-Zhen Huang
Summary: This work investigates an alternative solution for directly modulated lasers in multiwavelength 25 Gb/s systems. The proposed solution is based on a hybrid square/rhombus-rectangular laser and achieves single-mode lasing over a wide wavelength tuning range, with promising performance for 25 Gb/s modulation.
Article
Nanoscience & Nanotechnology
Samuel M. H. Luk, Hadrien Vergnet, Ombline Lafont, Przemyslaw Lewandowski, Nai H. Kwong, Elisabeth Galopin, Aristide Lemaitre, Philippe Roussignol, Jerome Tignon, Stefan Schumacher, Rolf Binder, Emmanuel Baudin
Summary: Through theoretical and experimental demonstrations, we show that a specially designed microcavity driven in the optical parametric oscillation regime emits light similar to a lighthouse, with emission focused in a single direction. The emission direction of this microlight-house is continuously controlled by the linear polarization of the incident laser, allowing for angular beam steering over 360 degrees. This effect arises from the interplay between the nonlinear optical response of microcavity exciton-polaritons, the differences in the subcavities forming the microcavity, and the rotational invariance of the device.
Article
Chemistry, Multidisciplinary
Zan Wang, Yunjiao Gu, Fenghua Liu, Weiping Wu
Summary: A facile one-pot method was introduced to successfully synthesize heavy metal-free ZrS2 colloidal quantum dots (QDs) with a wide bandgap. By utilizing 1-dodecanethiol (DT) as a sulfur precursor, controlled release of H2S was achieved in situ during the reaction at temperatures exceeding 195 degrees C, enabling precise control in the synthesis of small-sized ZrS2 QDs.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yu-Hsuan Su, Wei-Liang Chen, Hye Ryung Byun, Yu-Fu Zhang, Min-Rui Zhuang, Yu-Cih Lin, Chung-Kai Chang, Po-Yuan Wang, Che-Cheng Lin, Kuang- Lin, Hsin-Kuan Liu, Min-Kai Lee, Joon Jang, Yu-Ming Chang, Kuei-Fang Hsu
Summary: A new copper indium selenide with an orthorhombic crystal structure was synthesized at 800 degrees C. It emits intense photoluminescence at 657 nm and exhibits a direct band gap with an energy close to the photoluminescence position. The compound also shows n-type conductivity and strong nonlinear third-harmonic generation.
INORGANIC CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Ke Yang, Yue-De Yang, Jin-Long Xiao, Yong-Zhen Huang
Summary: This research demonstrates the manipulation of mode quality and lasing characteristics in coupled twin circular-side-octagon microcavity (TCOM) lasers by controlling their curvature. The numerical simulation results show that the mode Q factors, wavelength intervals of different transverse modes, and mode numbers for four-bounce modes can be manipulated through different deformations. Single-mode lasing for global modes with suppressed four-bounce modes is achieved by pumping both microcavities simultaneously. The results highlight the efficient manipulation of lasing modes in TCOM lasers, which can contribute to practical applications of microcavity lasers.
Article
Physics, Multidisciplinary
Xin-Yu Xie, Jian Li, Xiao-Lang Qiu, Yong-Li Wang, Chuan-Chuan Li, Xin Wei
Summary: This study analyzes the advantages of vertical cavity surface emitting lasers (VCSELs) as the light source for rubidium (Rb) and cesium (Cs) atomic clocks in terms of mode and polarization control. Three different shapes of oxidation apertures were fabricated: triangular, elliptic, and circular, with varying sizes. The results show that the triangular oxidized-VCSEL exhibits better mode and polarization selection compared to other shapes. When emitting in single mode, the triangular oxide-confined VCSEL achieves a measured side mode suppression ratio (SMSR) larger than 20 dB and a orthogonal polarization suppression ratio of 10 dB. Additionally, a resonant blueshift is observed with the decrease of aperture size for both triangular and elliptic apertures.
Article
Nanoscience & Nanotechnology
A. S. Abdalla, Suliman Alameen, K. Ayuel, R. Walser, Muhammad Sheraz Khan
Summary: We present a theoretical investigation of an unusual mechanism of excitation field effects on polariton semiconductor microcavities. By adjusting the pump excitation intensity and phase, the excitation of polariton condensates can be achieved. The importance of signal occupation and phase influence factors in signal polariton switching is highlighted.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(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
Engineering, Electrical & Electronic
[Anonymous]
Summary: Authors are requested to submit unpublished manuscripts for inclusion in an upcoming event.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Computer Science, Information Systems
Ke Yang, Yuede Yang, Youzeng Hao, Jiliang Wu, Yongtao Huang, Jiachen Liu, Jinlong Xiao, Yongzhen Huang
Summary: This paper proposes an integrated microlaser for laser mode control. By adjusting the refractive index offset, multiple coupled modes can be transformed into a single mode, making this microlaser suitable for large-scale photonic integration and optical information processing.
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Physics, Applied
S. Inagaki, M. Nakamura, Y. Okamura, M. Ogino, Y. Takahashi, L. C. Peng, X. Z. Yu, Y. Tokura, M. Kawasaki
Summary: High-quality CuI films with single-crystal structure and atomically flat surface were grown using molecular beam epitaxy on InAs substrate, showing extremely sharp emission from free excitons and much-suppressed emission from trapped states, which will advance the device applications and provide unprecedented functionalities in halide semiconductors at the atomically sharp heterointerfaces.
APPLIED PHYSICS LETTERS
(2021)
