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Optically induced transparency in bosonic cascade lasers

Optically induced transparency in bosonic cascade lasers
Optically induced transparency in bosonic cascade lasers

Bosonic cascade lasers are terahertz (THz) lasers based on stimulated radiative transitions between bosonic condensates of excitons or exciton–polaritons confined in a trap. We study the interaction of an incoming THz pulse resonant in frequency with the transitions between neighboring energy levels of the cascade. We show that at certain optical pump conditions the cascade becomes transparent to the incident pulse: it neither absorbs nor amplifies it in the mean-field approximation. The populations of intermediate levels of the bosonic cascade change as the THz pulse passes, nevertheless. In comparison, a fermionic cascade laser does not reveal any of these properties.

0146-9592
259-262
Liew, T. C.H.
293a2372-69e9-4ca4-b616-c8694c9a3812
Kavokin, A. V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Liew, T. C.H.
293a2372-69e9-4ca4-b616-c8694c9a3812
Kavokin, A. V.
70ffda66-cfab-4365-b2db-c15e4fa1116b

Liew, T. C.H. and Kavokin, A. V. (2018) Optically induced transparency in bosonic cascade lasers. Optics Letters, 43 (2), 259-262. (doi:10.1364/OL.43.000259).

Record type: Article

Abstract

Bosonic cascade lasers are terahertz (THz) lasers based on stimulated radiative transitions between bosonic condensates of excitons or exciton–polaritons confined in a trap. We study the interaction of an incoming THz pulse resonant in frequency with the transitions between neighboring energy levels of the cascade. We show that at certain optical pump conditions the cascade becomes transparent to the incident pulse: it neither absorbs nor amplifies it in the mean-field approximation. The populations of intermediate levels of the bosonic cascade change as the THz pulse passes, nevertheless. In comparison, a fermionic cascade laser does not reveal any of these properties.

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More information

Accepted/In Press date: 7 December 2017
e-pub ahead of print date: 8 December 2017
Published date: 15 January 2018

Identifiers

Local EPrints ID: 417432
URI: https://eprints.soton.ac.uk/id/eprint/417432
ISSN: 0146-9592
PURE UUID: a24de298-54e1-45be-ba70-0ec3053774ef

Catalogue record

Date deposited: 31 Jan 2018 17:30
Last modified: 31 Jan 2018 17:30

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Contributors

Author: T. C.H. Liew
Author: A. V. Kavokin

University divisions

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