scholarly journals Negative Terahertz Conductivity in Disordered Graphene Bilayers with Population Inversion* *

Author(s):  
D. Svintsov ◽  
T. Otsuji ◽  
V. Mitin ◽  
M. S. Shur ◽  
V. Ryzhii
2016 ◽  
Vol 55 (4) ◽  
Author(s):  
Victor Ryzhii ◽  
Taiichi Otsuji ◽  
Maxim Ryzhii ◽  
Vladimir Mitin ◽  
Michael S. Shur

We demonstrate that the indirect interband generation of photons in the optically or injection pumped graphene bilayer (GBL) heterostructures with an array of metal particles (GBLs “decorated” by metal particles) with population inversion can surpass their intraband (Drude) absorption. This can result in rather large absolute values of the negative dynamic terahertz (THz) conductivity in a wide range of frequencies at room temperature. This effect enables the creation of novel THz lasers based on the decorated GBLs.


2015 ◽  
Vol 106 (11) ◽  
pp. 113501 ◽  
Author(s):  
D. Svintsov ◽  
T. Otsuji ◽  
V. Mitin ◽  
M. S. Shur ◽  
V. Ryzhii

2020 ◽  
Vol 45 (2) ◽  
pp. 121-132
Author(s):  
Daniel P. Sheehan

AbstractCanonical statistical mechanics hinges on two quantities, i. e., state degeneracy and the Boltzmann factor, the latter of which usually dominates thermodynamic behaviors. A recently identified phenomenon (supradegeneracy) reverses this order of dominance and predicts effects for equilibrium that are normally associated with non-equilibrium, including population inversion and steady-state particle and energy currents. This study examines two thermodynamic paradoxes that arise from supradegeneracy and proposes laboratory experiments by which they might be resolved.


2019 ◽  
Vol 115 (14) ◽  
pp. 143301
Author(s):  
H. Yada ◽  
H. Sekine ◽  
T. Miyamoto ◽  
T. Terashige ◽  
R. Uchida ◽  
...  

2019 ◽  
Vol 99 (3) ◽  
Author(s):  
Jiří Kuchařík ◽  
Hynek Němec ◽  
Tomáš Ostatnický

2014 ◽  
Vol 89 (4) ◽  
Author(s):  
G. Liu ◽  
V. Zakharov ◽  
T. Collins ◽  
P. Gould ◽  
S. A. Malinovskaya

2017 ◽  
Vol 121 (4) ◽  
pp. 2451-2458 ◽  
Author(s):  
Xiao Xing ◽  
Litao Zhao ◽  
Zeyu Zhang ◽  
Liang Fang ◽  
Zhengfu Fan ◽  
...  

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