scholarly journals Multi-frequency coherent emission from superstructure thermal emitters

2021 ◽  
Vol 118 (14) ◽  
pp. 141102
Author(s):  
Guanyu Lu ◽  
Marko Tadjer ◽  
Joshua D. Caldwell ◽  
Thomas G. Folland
Keyword(s):  
Thermal Emitters ◽  
Coherent Emission

scholarly journals Neutron Stars—Thermal Emitters

2014 ◽  
Vol 191 (1-4) ◽  
pp. 171-206 ◽  
Author(s):  
Alexander Y. Potekhin ◽  
Andrea De Luca ◽  
José A. Pons
Keyword(s):  
Neutron Stars ◽  
Thermal Emitters

Coherent Emission of Free Excitons in CdSe Crystals

1968 ◽  
Vol 26 (2) ◽  
pp. K139-K142 ◽  
Author(s):  
L. N. Kurbatov ◽  
E. F. Gross ◽  
V. E. Mashenko ◽  
B. S. Razbirin ◽  
N. N. Mochalkin ◽  
...  
Keyword(s):  
Coherent Emission

Direct Coupling of Coherent Emission from Site-Selectively Grown III–V Nanowire Lasers into Proximal Silicon Waveguides

ACS Photonics ◽  
2017 ◽  
Vol 4 (10) ◽  
pp. 2537-2543 ◽  
Author(s):  
T. Stettner ◽  
T. Kostenbader ◽  
D. Ruhstorfer ◽  
J. Bissinger ◽  
H. Riedl ◽  
...  
Keyword(s):  
Direct Coupling ◽  
Silicon Waveguides ◽  
Coherent Emission ◽  
Nanowire Lasers

scholarly journals Coherent emission from the stack of Josephson junctions with the non-uniform inductive interaction

2019 ◽  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Gaussian Distribution ◽  
Josephson Junctions ◽  
Critical Currents ◽  
Collective Modes ◽  
Zero Field ◽  
Strong Emission ◽  
Inductive Interaction ◽  
Coherent Emission

During last decade, considerable efforts were made to achieve coherent emission from stacks of many Josephson junctions. It is known that strong emission from a junction in the presence of external magnetic field appears at the so-called Fiske steps in the IV-characteristic at voltages which correspond to frequencies of geometrical resonances. However, it is possible to obtain resonant steps in long junctions without external magnetic field. The periodical movement of fluxons is excited due to some disorder in the distribution of critical currents along junctions. The so-called zero-field steps are formed in the IV-curve due to the interaction of fluxons with oscillations of voltage at Josephson frequencies. We investigated numerically IV-characteristics and the dependence of the average square of ac voltage at the end of the stack of two long Josephson junctions on the average voltage. Junctions interacted inductively with each other. We introduced not only the Gaussian distribution of critical currents along junctions but also the Gaussian distribution of coefficients of the interaction between junctions (mutual inductances). Zero-field steps in the IV-characteristic were found at voltages which corresponded to frequencies of in-phase collective modes in the stack as well as to frequencies of uncoupled junctions. Zero-field steps appeared in the hysteretic region of the IV-curve. There appeared also jumps of voltage from the resistive branch to the zero-field step. We showed that there existed distributions of mutual inductances along junctions which provided jumps to voltages at which the average square of ac voltage at the end of the stack (which is proportional to power of emission) was larger than that for the stack with the uniform distribution of mutual inductances.

scholarly journals Optimized mid-infrared thermal emitters for applications in aircraft countermeasures

AIP Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 125112 ◽  
Author(s):  
Simón G. Lorenzo ◽  
Chenglong You ◽  
Christopher H. Granier ◽  
Georgios Veronis ◽  
Jonathan P. Dowling
Keyword(s):  
Mid Infrared ◽  
Thermal Emitters

Design study of micromachined thermal emitters for NDIR gas sensing in the 9-12 μm wavelength range

2007 ◽  
Author(s):  
E. Cozzani ◽  
C. Summonte ◽  
L. Belsito ◽  
G.C. Cardinali ◽  
A. Roncaglia
Keyword(s):  
Wavelength Range ◽  
Gas Sensing ◽  
Design Study ◽  
Thermal Emitters

Coherent Emission: Linear Theory

1992 ◽  
pp. 84-152
Author(s):  
H. P. Freund ◽  
T. M. Antonsen
Keyword(s):  
Linear Theory ◽  
Coherent Emission
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