Terahertz lasers based on optically pumped four-level asymmetrical double quantum wells

2011 ◽  
Vol 43 (8) ◽  
pp. 1445-1448 ◽  
Author(s):  
Dong-Feng Liu
Keyword(s):  
Quantum Wells ◽  
Double Quantum ◽  
Optically Pumped ◽  
Terahertz Lasers

INFLUENCE OF ELECTRON TEMPERATURE ON POPULATION INVERSION AMONG ELECTRONIC SUBBANDS IN OPTICALLY PUMPED SEMICONDUCTOR QUANTUM WELLS

1996 ◽  
Vol 10 (27) ◽  
pp. 1323-1331 ◽  
Author(s):  
W. XU ◽  
C. ZHANG
Keyword(s):  
Quantum Wells ◽  
Electron Temperature ◽  
Population Inversion ◽  
Laser System ◽  
Far Infrared ◽  
Double Quantum ◽  
Hot Electron ◽  
Optically Pumped ◽  
Scattering Rate ◽  
Double Quantum Well

A detailed theoretical study on population inversion among different electronic subbands, induced by hot-electron interactions with LO-phonons and with photons, is presented for an optically pumped AlGaAs-GaAs double quantum well system which may behave as a 3-level far-infrared laser generator. The influence of electron temperature and pumping intensity on the population inversion in this laser system proposed very recently, has been studied through calculating the inter-subband electronic scattering rate caused by electron-LO-phonon interactions and by optical absorption scattering. Theoretical results obtained from this study indicate that at a fixed pumping intensity, the population inversion among different electronic subbands can be tuned by varying electron temperature through, e.g. applying an in-plane electric field.

Evidence for condensation of excitons in double quantum wells

1996 ◽  
Vol 166 (7) ◽  
pp. 801-803 ◽  
Author(s):  
L.V. Butov ◽  
A. Zrenner ◽  
M. Hagn ◽  
G. Abstreiter ◽  
G. Boehm ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Double Quantum

Magneto-optical spectroscopy of modulation-doped GaAs/AlGaAs asymmetric coupled double quantum wells

1999 ◽  
Vol 110 (11) ◽  
pp. 633-638
Author(s):  
Joo In Lee ◽  
Annamratu Kasi Viswanath ◽  
Sungkyu Yu ◽  
Eun-Joo Shin ◽  
Kyu-Seok Lee ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Optical Spectroscopy ◽  
Double Quantum

Assignments of transitions in optically-pumped NMR of GaAs/AlGaAs quantum wells on a bulk GaAs substrate

2014 ◽  
Vol 90 (12) ◽  
Author(s):  
E. L. Sesti ◽  
D. D. Wheeler ◽  
S. E. Hayes ◽  
D. Saha ◽  
G. D. Sanders ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Gaas Substrate ◽  
Optically Pumped ◽  
Bulk Gaas ◽  
Optically Pumped Nmr

Tunnelling and relaxation in semiconductor double quantum wells

1997 ◽  
Vol 60 (3) ◽  
pp. 345-387 ◽  
Author(s):  
R Ferreira ◽  
G Bastard
Keyword(s):  
Quantum Wells ◽  
Double Quantum

Low threshold, room temperature pulsed and quasi-continuous lasing in optically pumped CdZnTe/ZnTe quantum wells

1993 ◽  
Vol 22 (5) ◽  
pp. 479-484 ◽  
Author(s):  
R. D. Feldman ◽  
T. D. Harris ◽  
J. E. Zucker ◽  
D. Lee ◽  
R. F. Austin ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Room Temperature ◽  
Optically Pumped ◽  
Low Threshold

Coherent model for resonant tunneling of electrons in double quantum wells under electric fields

1994 ◽  
Vol 49 (8) ◽  
pp. 5434-5437 ◽  
Author(s):  
Shi-rong Jin ◽  
Zhong-ying Xu ◽  
Jin-sheng Luo
Keyword(s):  
Quantum Wells ◽  
Electric Fields ◽  
Resonant Tunneling ◽  
Double Quantum

Ultraviolet Stimulated Emission From Optically Pumped AlGaN/AlGaN Multiple Quantum Wells on Pulsed Laterally Overgrown $a$-Plane GaN

2011 ◽  
Vol 4 (8) ◽  
pp. 082103 ◽  
Author(s):  
Mohamed Lachab ◽  
Krishnan Balakrishnan ◽  
Bin Zhang ◽  
Joe Dion ◽  
Qhalid Fareed ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Stimulated Emission ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Optically Pumped
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