scholarly journals Population inversion in optically pumped asymmetric quantum well terahertz lasers

1997 ◽  
Vol 81 (11) ◽  
pp. 7135-7140 ◽  
Author(s):  
P. Harrison ◽  
R. W. Kelsall
Keyword(s):  
Quantum Well ◽  
Population Inversion ◽  
Optically Pumped ◽  
Asymmetric Quantum ◽  
Terahertz Lasers

Graphene Terahertz Lasers: Injection versus Optical Pumping

2013 ◽  
Vol 1505 ◽  
Author(s):  
Taiichi Otsuji ◽  
Akira Satou ◽  
Maxim Ryzhii ◽  
Vladimir Mitin ◽  
Victor Ryzhii
Keyword(s):  
Spectral Range ◽  
Population Inversion ◽  
Optical Pumping ◽  
Optically Pumped ◽  
Dynamic Conductivity ◽  
Graphene Layers ◽  
Nonequilibrium States ◽  
Injection Type ◽  
Terahertz Lasers ◽  
Graphene Structures

ABSTRACTIn this paper we demonstrate that graphene is one of the best materials for new types of terahertz lasers as optical and/or injection pumping of graphene can exhibit negative-dynamic conductivity in the terahertz spectral range. We analyze the formation of nonequilibrium states in optically pumped graphene layers and in forward-biased graphene structures with lateral p-i-n junctions and consider the conditions of population inversion and lasing. The latter provides a significant advantage of the injection pumping in realization of graphene terahertz lasers. We benchmark graphene as a prospective material for injection-type terahertz lasers.

Intrinsic bistability in an optically pumped asymmetric quantum well structure

1990 ◽  
Vol 7 (4) ◽  
pp. 327-330
Author(s):  
A. Zrenner ◽  
J.M. Worlock ◽  
L.T. Florez ◽  
J.P. Harbison ◽  
S.A. Lyon
Keyword(s):  
Quantum Well ◽  
Optically Pumped ◽  
Quantum Well Structure ◽  
Asymmetric Quantum

Small-chirp 40-Gbps electroabsorption modulator with novel tensile-strained asymmetric quantum-well absorption layer

2003 ◽  
Vol 39 (6) ◽  
pp. 813-819 ◽  
Author(s):  
Y. Miyazaki ◽  
H. Tada ◽  
S. Tokizaki ◽  
K. Takagi ◽  
T. Aoyagi ◽  
...  
Keyword(s):  
Quantum Well ◽  
Electroabsorption Modulator ◽  
Absorption Layer ◽  
Asymmetric Quantum
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