TY - CHAP
T1 - Can any design support an effective nanostructure lasing for a few THz?
AU - Shvartsman, L. D.
AU - Laikhtman, B.
PY - 2011
Y1 - 2011
N2 - We present here a bird eye view on the basic physical factors limiting the efficiency of nanostructure-based THz lasing. The origin of these limitations is the contradiction between the requirements of THz gaps, high radiative matrix element value, and selective depopulation. Various ways were suggested to go out of these limitations. They include: sophisticated nanostructure layout, the usage of QCLs, and switch to bipolar THz lasing. We present the results of detailed density matrix based calculations comparing these approaches. In theory InAs-GaSb bipolar THz lasers are the most promising.
AB - We present here a bird eye view on the basic physical factors limiting the efficiency of nanostructure-based THz lasing. The origin of these limitations is the contradiction between the requirements of THz gaps, high radiative matrix element value, and selective depopulation. Various ways were suggested to go out of these limitations. They include: sophisticated nanostructure layout, the usage of QCLs, and switch to bipolar THz lasing. We present the results of detailed density matrix based calculations comparing these approaches. In theory InAs-GaSb bipolar THz lasers are the most promising.
UR - http://www.scopus.com/inward/record.url?scp=79952590853&partnerID=8YFLogxK
U2 - 10.1007/978-94-007-0769-6_22
DO - 10.1007/978-94-007-0769-6_22
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AN - SCOPUS:79952590853
SN - 9789400707689
T3 - NATO Science for Peace and Security Series B: Physics and Biophysics
SP - 153
EP - 158
BT - Terahertz and Mid Infrared Radiation
PB - Springer Verlag
ER -