Observation Of Nondegenerate Two-Photon Gain In Gaas

Abstract

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.

Publication Date

8-10-2016

Publication Title

Physical Review Letters

Volume

117

Issue

7

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.117.073602

Socpus ID

84982162343 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84982162343

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