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Observation of Nondegenerate Two-Photon Gain in GaAs

Reichert, Matthew ; Smirl, Arthur L ; Salamo, Greg ; Hagan, David J ; Van Stryland, Eric W

Physical review letters, 2016-08, Vol.117 (7), p.073602-073602, Article 073602 [Periódico revisado por pares]

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Título:
Observation of Nondegenerate Two-Photon Gain in GaAs
Autor: Reichert, Matthew ; Smirl, Arthur L ; Salamo, Greg ; Hagan, David J ; Van Stryland, Eric W
Assuntos: Absorption ; Femtosecond ; Gain ; Gallium arsenide ; Lasers ; Pumps ; Semiconductor lasers ; Semiconductors
É parte de: Physical review letters, 2016-08, Vol.117 (7), p.073602-073602, Article 073602
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Two-photon lasers require materials with large two-photon gain (2PG) coefficients and low linear and nonlinear losses. Our previous demonstration of large enhancement of two-photon absorption in semiconductors for very different photon energies translates directly into enhancement of 2PG. We experimentally demonstrate nondegenerate 2PG in optically excited bulk GaAs via femtosecond pump-probe measurements. 2PG is isolated from other pump induced effects through the difference between measurements performed with parallel and perpendicular polarizations of pump and probe. An enhancement in the 2PG coefficient of nearly 2 orders of magnitude is reported. The results point a possible way toward two-photon semiconductor lasers.
Editor: United States
Idioma: Inglês

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