scholarly journals Squeezing induced high-efficiency diffraction grating in two-level system

2017 ◽  
Vol 25 (4) ◽  
pp. 4483 ◽  
Author(s):  
Guang-Ling Cheng ◽  
Ai-Xi Chen
Keyword(s):  
Diffraction Grating ◽  
High Efficiency ◽  
Level System

scholarly journals High-efficiency diffraction grating coupler for multimode optical interconnect

2006 ◽  
Author(s):  
Janyce Franc ◽  
Nathalie Destouches ◽  
Danièle Blanc ◽  
Jean-Claude Pommier ◽  
Svetlen Tonchev ◽  
...  
Keyword(s):  
Diffraction Grating ◽  
High Efficiency ◽  
Optical Interconnect ◽  
Grating Coupler

High-efficiency metallic multistratum concave diffraction grating

2012 ◽  
Vol 51 (18) ◽  
pp. 4073 ◽  
Author(s):  
Pierre Pottier ◽  
Muthukumaran Packirisamy
Keyword(s):  
Diffraction Grating ◽  
High Efficiency ◽  
Concave Diffraction Grating ◽  
Concave Diffraction

scholarly journals High Resolution X-ray Spectroscopy: Is It Interesting? Is It Possible?

2005 ◽  
Vol 13 ◽  
pp. 790-792
Author(s):  
Webster Cash
Keyword(s):  
High Resolution ◽  
High Throughput ◽  
Spectral Resolution ◽  
Diffraction Grating ◽  
High Efficiency ◽  
X Ray ◽  
New Science

AbstractThe diffraction grating spectra from Chandra and XMM-Newton have given the astronomical community a huge step forward in x-ray spectroscopy of celestial sources. They have proven the scientific richness of the field. But the spectra have resolution of only 300 to 1000 – low by the standards of the visible and the ultraviolet. We discuss some of the exciting new science that can be addressed if spectral resolution of up to 10,000 (or more) can be achieved in the x-ray. We then show how practical, high efficiency, high resolution x-ray spectrographs can be built for high throughput missions like Constellation-X and XEUS.

scholarly journals Isoenergetic Cycle for the Quantum Rabi Model

2018 ◽  
Author(s):  
G. Alvarado Barrios ◽  
Francisco J. Peña ◽  
F. Albarrán-Arriagada ◽  
P. Vargas ◽  
J. C. Retamal
Keyword(s):  
Power Law ◽  
Coupling Strength ◽  
High Efficiency ◽  
Strength Parameter ◽  
Level System ◽  
Expectation Value ◽  
Resonator Frequency ◽  
Rabi Model ◽  
Parameter Values ◽  
System Frequency

The isoenergetic cycle is a purely mechanical cycle comprised of adiabatic and isoenergetic processes. In the latter the system interacts with an energy bath keeping constant the expectation value of the Hamiltonian. This cycle has been mostly studied in systems consisting of particles confined in a power-law trap. In this work we study the performance of the isoenergetic cycle for a system described by the quantum Rabi model for the case of controlling the coupling strength parameter, the resonator frequency and the two-level system frequency. For the cases of controlling either the coupling strength parameter or the resonator frequency, we find that it is possible to closely approach to maximal unit efficiency when the parameter is sufficiently increased in the first adiabatic stage. In addition, for the first two cases the maximal work extracted is obtained at parameter values corresponding to high efficiency which constitutes an improvement over current proposals of this cycle.

High efficiency terahertz diffraction grating with trapezoidal elements

2017 ◽  
Vol 26 (12) ◽  
pp. 124203 ◽  
Author(s):  
Yin-Zhong Wu ◽  
Quan-Pin Fan ◽  
Qiang-Qiang Zhang ◽  
Lai Wei ◽  
Yong Chen ◽  
...  
Keyword(s):  
Diffraction Grating ◽  
High Efficiency

High-efficiency, liquid-crystal-based, controllable diffraction grating

2005 ◽  
Vol 22 (11) ◽  
pp. 2510 ◽  
Author(s):  
Yanli Zhang ◽  
Jennifer Colegrove ◽  
David B. Chung ◽  
Bin Wang ◽  
Philip J. Bos
Keyword(s):  
Liquid Crystal ◽  
Diffraction Grating ◽  
High Efficiency
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