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 two orders-of-magnitude is reported. The results point a possible way toward two-photon semiconductor lasers.

5 pages, 5 figures

References in corpus (1)

• 3-D IR imaging with uncooled GaN photodiodes using nondegenerate two-photon absorption

Cited by in corpus (8)

• Highly sensitive detection for infrared photons by non-degenerate two-photon absorption under mid-infrared pumping
• Nonlinear photoionization of transparent solids: a nonperturbative theory obeying selection rules
• Higher-order contributions and non-perturbative effects in the non-degenerate nonlinear optical absorption of direct-gap semiconductors
• Phase-preserving linear amplifiers not simulable by the parametric amplifier
• Single-Photon Infrared Imaging with a Silicon Camera Based on Long-Wavelength-Pumping Two-Photon Absorption
• Nondegenerate Two-Photon Absorption in GaAs/AlGaAs Multiple Quantum Well Waveguides
• Vibrational two-photon emission from coherently excited solid parahydrogen
• Highly controllable stabilization and switching of multiple colliding soliton sequences with generic Ginzburg-Landau gain-loss