Results 61 to 70 of about 137,995 (220)

Optoelectronic Oscillators: Progress from Classical Designs to Integrated Systems

Photonics
Optoelectronic oscillators (OEOs) have emerged as indispensable tools for generating low-phase-noise microwave and millimeter-wave signals, which are critical for a variety of high-performance applications.
Qidi Liu, Jiuchang Peng, Juanjuan Yan
doaj   +1 more source

Giant Nonequilibrium Valley Control via Spin‐Selective Hot‐Carrier Transfer in an Antiferromagnetic van der Waals Stack

Advanced Materials, EarlyView.
Spin‐selective hot‐carrier transfer across CrSBr/WSe2/CrSBr interfaces couples the continuously tunable magnetic configuration of antiferromagnetic CrSBr to the valley degrees of freedom of monolayer WSe2, enabling giant nonequilibrium valley control and magnetic‐state‐dependent reversal of circularly polarized emission.
Ke Xiao, Jiabao Yang, Kai Feng, Yicheng Guan, James Caleb Peters, Ramona Hoffmann, Niels Schröter, Stuart S. P. Parkin   +7 more
wiley   +1 more source

Simple Optoelectronic Feedback in Microwave Oscillators [PDF]

, 2009
A proposed method of stabilizing microwave and millimeter-wave oscillators calls for the use of feedback in optoelectronic delay lines characterized by high values of the resonance quality factor (Q).
Maleki, Lute, Iltchenko, Vladimir
core  

Efficient Sunlight Degradation of Wide‐Spectrum Antibiotics Through Enhanced Charge Separation in SnTCPP NPs‐Nb2C Schottky Heterojunction: Ultrafast Carrier Dynamic Study

Advanced Materials Interfaces, EarlyView.
Due to enhanced charge transfer and carrier mobility on the surface, the SnTCPP NPs‐Nb2C Schottky heterojunctions demonstrate exceptional sunlight‐driven catalytic activity toward tetracycline antibiotics and ofloxacin degradation, achieving a removal efficiency of up to 99.9% within 60 min of irradiation, both in model wastewater and natural water ...
Juanxuan Guo, Sheng Liao, Ranye Liao, Xinyan Ke, Ming‐De Li, Li Dang   +5 more
wiley   +1 more source

Generation of Dual-Frequency Microwave Pulse Based on Active Mode-Locked Optoelectronic Oscillator

IEEE Photonics Journal
Active mode-locked optoelectronic oscillator(AML-OEO) is a high-quality pulsed microwave source that can be used to generate microwave pulse signals in various forms.
Junfeng Ren, Ping Li, Chenyang Ma, Cheng Gu, Boxiong Cui, Huitong Yang, Zhengyang Xie, Xin Zhao, Zheng Zheng   +8 more
doaj   +1 more source

Advances in Halide Perovskites for Photon Radiation Detectors

Advanced Materials Technologies, EarlyView.
This work highlights recent progress in perovskite‐based photon radiation detectors, covering organic–inorganic hybrid, inorganic, lead‐free double, and vacancy‐ordered halide perovskites. Their detection performance is compared, material‐specific advantages and challenges are examined, and provides insight into current limitations and future ...
Liangling Wang, Jieqi Wang, Xiaojun Cui, Carsten Ronning   +3 more
wiley   +1 more source

Complex optical constants of CsPbCl3 perovskite thin films determined by spectroscopic ellipsometry

APL Energy
Designing optoelectronic devices based on cesium lead chloride (CsPbCl3) perovskites requires accurate values of their optical constants. Unfortunately, experimental data for this material are limited thus far. Here, we applied spectroscopic ellipsometry
Sana Khan, Piotr J. Cegielski, Manuel Runkel, Thomas Riedl, Maryam Mohammadi, Max C. Lemme   +5 more
doaj   +1 more source

Dynamic instabilities of microwaves generated with optoelectronic oscillators [PDF]

, 2007
3 pages.-- OCIS codes: 120.3940, 190.3100, 350.4010.-- Final full-text version of the paper available at: http://dx.doi.org/10.1364/OL.32.002571.We introduce a time-domain model to study the dynamics of optoelectronic oscillators.
Rubiola, Enrico, Bendoula, Ryad, Larger, Laurent, Colet, Pere, Tavernier, Hervé, Tavernier, H., Bendoula, R., Chembo Kouomou, Yanne, Larger, L., Colet, P., Kouomou, Y.C, Rubiola, E.   +11 more
core   +1 more source

Deterministic Transferable Planar Dielectric Mirrors for Investigating Strong Light–Matter Coupling

Advanced Optical Materials, EarlyView.
Transferable dielectric distributed Bragg reflectors enable the deterministic assembly of high‐quality planar microcavities while maintaining the intrinsic properties of quantum materials during fabrication. The resulting structures exhibit robust exciton‐photon coupling in monolayer WS2${\rm WS}_{2}$ from cryogenic to room temperature, establishing a ...
Atanu Patra, Subhamoy Sahoo, Johannes Düreth, Simon Betzold, Sven Höfling   +4 more
wiley   +1 more source

Bright‐Dark Exciton Splitting in Lead Iodide Perovskite Crystals Accessed via Quantum Beats in Photon Echoes

Advanced Optical Materials, EarlyView.
Understanding exciton fine structure is crucial for optoelectronic and quantum photonic applications of lead halide perovskites. It is demonstrated that polarization‐sensitive photon‐echo spectroscopy in a magnetic field resolves exciton fine‐structure splittings hidden by inhomogeneous broadening, enabling direct determination of the bright‐dark ...
M. Alex Hollberg, Mikhail O. Nestoklon, Artur V. Trifonov, Stefan Grisard, Oleh Hordiichuk, Dmitry N. Dirin, Maksym V. Kovalenko, Dmitri R. Yakovlev, Manfred Bayer, Ilya A. Akimov   +9 more
wiley   +1 more source