Results 281 to 290 of about 26,153,681 (361)

2H–2M Phase Control of WSe2 Nanosheets by Se Enrichment Toward Enhanced Electrocatalytic Hydrogen Evolution Reaction

Advances in Materials, 2023
The phase control of transition metal dichalcogenides (TMDs) is an intriguing approach for tuning the electronic structure toward extensive applications.
Ik Seon Kwon, I. Kwak, Ju Yeon Kim, Seung Jae Lee, Qadeer Akbar Sial, Junaid Ihsan, Kug‐Seung Lee, Seung Jo Yoo, Jeunghee Park, H. Kang   +9 more
semanticscholar   +1 more source

Novel Passive Vector-Sum Reconfigurable Filtering Phase Shifter With Continuous Phase-Control and Tunable Center Frequency

IEEE transactions on microwave theory and techniques, 2022
In this article, a novel reconfigurable filtering vector-sum phase shifter (RFPS) with a continuous phase shift range of $\ge 300^{\circ }$ and tunable operating frequency range from 1.05 to 1.3 GHz is proposed.
Xu Zhu, Tao Yang, P. Chi, R. Xu
semanticscholar   +1 more source

Phase Control of Cs-Pb-Br Derivatives to Suppress 0D Cs4 PbBr6 for High-Efficiency and Stable All-Inorganic CsPbBr3 Perovskite Solar Cells.

Small, 2021
The precise phase control of Cs-Pb-Br derivatives from 3D CsPbBr3 to 0D Cs4 PbBr6 highly determines the photovoltaic performance of all-inorganic CsPbBr3 perovskite solar cells (PSCs).
Jingwei Zhu, B. He, Xinpeng Yao, Haiyan Chen, Yanyan Duan, Jialong Duan, Q. Tang   +6 more
semanticscholar   +1 more source

Dual-band independent phase control based on high efficiency metasurface [Invited]

Chinese Optics Letters (COL), 2021
A general method to realize arbitrary dual-band independent phase control is proposed and demonstrated in this paper. A double-layered C-shape reflective meta-atom is designed to realize independent phase control with high efficiency.
Jinxing Li, Yueyi Yuan, Qun Wu, S. Burokur, Kuang Zhang   +4 more
semanticscholar   +1 more source

Phase control of the Pancharatnam phase

Physical Review A, 2009
We propose a method to control the atomic dynamics in the presence of electromagnetic fields. Instead of measuring the population dynamics, we focus on the possibility of controlling the Pancharatnam phase. For a two-level system we find that this phase can be optically induced and controlled by the phase shift.
Bouchene, M. A., Abdel-Aty, M.
openaire   +1 more source

Controlled Optimization of Phases at an Intersection

Transportation Science, 1997
This paper presents a general purpose algorithm for real-time traffic control at an intersection. Our methodology, based on dynamic programming, allows optimization of a variety of performance indices such as delay, stops and queue lengths. Furthermore, optimal phase sequencing is a direct by-product of this new approach.
Suvrajeet Sen, K. Larry Head
openaire   +1 more source

Phase Control and In-situ Passivation of Quasi-2D Metal Halide Perovskites for Spectrally Stable Blue Light-Emitting Diodes.

ACS Applied Materials and Interfaces, 2020
Fabricating efficient and spectrally stable pure-blue perovskite light-emitting diodes (LEDs) has been elusive and remains of great interest. Herein, we show the incorporation of diammonium salts in quasi-2D perovskite precursors for phase control of ...
Michael Worku, Qingquan He, Liang-jin Xu, Jisook Hong, R. Yang, L. Tan, Biwu Ma   +6 more
semanticscholar   +1 more source

Phase-Controlled Currents in Semiconductors

Physical Review Letters, 1995
The direction of emission of photoexcited electrons in semiconductors is controlled by adjusting the relative phase difference between a midinfrared radiation and its second harmonic. This is achieved by using quantum interference of electrons produced with one- and two-photon bound-to-free intersubband transitions in AlGaAs/GaAs quantum well ...
Dupont, E., Corkum, P. B., Liu, H. C., Buchanan, M., Wasilewski, Z. R.   +4 more
openaire   +3 more sources

Crystal Phase Control of Gold Nanomaterials by Wet-Chemical Synthesis.

Accounts of Chemical Research, 2020
ConspectusGold (Au), a transition metal with an atomic number of 79 in the periodic table of elements, was discovered in approximately 3000 B.C. Due to the ultrahigh chemical stability and brilliant golden color, Au had long been thought to be a most ...
Shiyao Lu, Jinzhe Liang, Huiwu Long, Huangxu Li, Xichen Zhou, Zhentao He, Ye Chen, Hongyan Sun, Zhanxi Fan, Hua Zhang   +9 more
semanticscholar   +1 more source

Deep-learning-assisted, two-stage phase control method for high-power mode-programmable orbital angular momentum beam generation

, 2020
High-power mode-programmable orbital angular momentum (OAM) beams have received substantial attention in recent years. They are widely used in optical communication, nonlinear frequency conversion, and laser processing.
Tianyue Hou, Yi An, Qi Chang, P. Ma, Jun Li, Liangjin Huang, Zhi Dong, Wu Jian, R. Su, Yanxing Ma, P. Zhou   +10 more
semanticscholar   +1 more source