scholarly journals Terahertz lasers based on optically pumped multiple graphene structures with slot-line and dielectric waveguides

2010 ◽  
Vol 107 (5) ◽  
pp. 054505 ◽  
Author(s):  
V. Ryzhii ◽  
A. A. Dubinov ◽  
T. Otsuji ◽  
V. Mitin ◽  
M. S. Shur
Keyword(s):  
Dielectric Waveguides ◽  
Optically Pumped ◽  
Slot Line ◽  
Terahertz Lasers ◽  
Graphene Structures

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.

Optically pumped terahertz lasers with high pulse repetition frequency: theory and design

2009 ◽  
Vol 7 (2) ◽  
pp. 127-129 ◽  
Author(s):  
孙玉德 Yude Sun ◽  
付石友 Shiyou Fu ◽  
王静 Jing Wang ◽  
孙正和 Zhenghe Sun ◽  
张延超 Yanchao Zhang ◽  
...  
Keyword(s):  
Pulse Repetition Frequency ◽  
Frequency Theory ◽  
Repetition Frequency ◽  
Pulse Repetition ◽  
Optically Pumped ◽  
High Pulse ◽  
Terahertz Lasers ◽  
High Pulse Repetition Frequency

Transmittance investigation on capacitive mesh on thick dielectric substrates as output windows for optically pumped terahertz lasers

2010 ◽  
Vol 19 (11) ◽  
pp. 114202 ◽  
Author(s):  
Chun-Chao Qi ◽  
Du-Luo Zuo ◽  
Yan-Zhao Lu ◽  
Jian Tang ◽  
Zu-Hai Cheng
Keyword(s):  
Optically Pumped ◽  
Dielectric Substrates ◽  
Terahertz Lasers

scholarly journals A high-efficiency regime for gas-phase terahertz lasers

2018 ◽  
Vol 115 (26) ◽  
pp. 6614-6619 ◽  
Author(s):  
Fan Wang ◽  
Jeongwon Lee ◽  
Dane J. Phillips ◽  
Samuel G. Holliday ◽  
Song-Liang Chua ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
High Pressures ◽  
High Efficiency ◽  
Energy Levels ◽  
Far Infrared ◽  
Molecular Gas ◽  
Optically Pumped ◽  
Compact Source ◽  
Ab Initio Theory ◽  
Terahertz Lasers

We present both an innovative theoretical model and an experimental validation of a molecular gas optically pumped far-infrared (OPFIR) laser at 0.25 THz that exhibits 10× greater efficiency (39% of the Manley–Rowe limit) and 1,000× smaller volume than comparable commercial lasers. Unlike previous OPFIR-laser models involving only a few energy levels that failed even qualitatively to match experiments at high pressures, our ab initio theory matches experiments quantitatively, within experimental uncertainties with no free parameters, by accurately capturing the interplay of millions of degrees of freedom in the laser. We show that previous OPFIR lasers were inefficient simply by being too large and that high powers favor high pressures and small cavities. We believe that these results will revive interest in OPFIR laser as a powerful and compact source of terahertz radiation.

A theoretical investigation of wedged capacitive strip-grating output couplers for optically pumped terahertz lasers

2010 ◽  
Vol 283 (4) ◽  
pp. 574-578 ◽  
Author(s):  
Chunchao Qi ◽  
Duluo Zuo ◽  
Fanqi Meng ◽  
Jian Tang ◽  
Zuhai Cheng
Keyword(s):  
Theoretical Investigation ◽  
Optically Pumped ◽  
Terahertz Lasers

Optically pumped type-II interband terahertz lasers

1999 ◽  
Vol 75 (7) ◽  
pp. 899-901 ◽  
Author(s):  
I. Vurgaftman ◽  
J. R. Meyer
Keyword(s):  
Type Ii ◽  
Optically Pumped ◽  
Terahertz Lasers
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