Control of the nonlinear response of bulk GaAs induced by long-wavelength infrared pulses

D. Matteo; J. Pigeon; S. Y.A. Tochitsky; U. Huttner; M. Kira; S. W. Koch; J. V. Moloney; C. Joshi

doi:10.1364/OE.27.030462

Control of the nonlinear response of bulk GaAs induced by long-wavelength infrared pulses

D. Matteo, J. Pigeon, S. Y.A. Tochitsky, U. Huttner, M. Kira, S. W. Koch, J. V. Moloney, C. Joshi

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The nonlinear optical response of GaAs is studied using extremely nonresonant 10 µm laser pulses with peak intensities greater than 2 GW/cm². We observe over an order of magnitude enhancement in the four-wave mixing efficiency by decreasing the CO₂ laser beat-wave frequency. This enhancement is attributed to currents of photoexcited unbound carriers modulated at the beat frequency, confirmed by measurements of nonlinear absorption at this long wavelength as well as a fully microscopic analysis of the excitation dynamics. Modeling of such nonperturbative semiconductor-laser interactions predicts that further decreasing the beat frequency can increase the nonlinear response and allow for its control over two orders of magnitude.

Original language	English (US)
Pages (from-to)	30462-30472
Number of pages	11
Journal	Optics Express
Volume	27
Issue number	21
DOIs	https://doi.org/10.1364/OE.27.030462
State	Published - Oct 14 2019

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Control of the nonlinear response of bulk GaAs induced by long-wavelength infrared pulses",

abstract = "The nonlinear optical response of GaAs is studied using extremely nonresonant 10 µm laser pulses with peak intensities greater than 2 GW/cm2. We observe over an order of magnitude enhancement in the four-wave mixing efficiency by decreasing the CO2 laser beat-wave frequency. This enhancement is attributed to currents of photoexcited unbound carriers modulated at the beat frequency, confirmed by measurements of nonlinear absorption at this long wavelength as well as a fully microscopic analysis of the excitation dynamics. Modeling of such nonperturbative semiconductor-laser interactions predicts that further decreasing the beat frequency can increase the nonlinear response and allow for its control over two orders of magnitude.",

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T1 - Control of the nonlinear response of bulk GaAs induced by long-wavelength infrared pulses

AU - Matteo, D.

AU - Pigeon, J.

AU - Tochitsky, S. Y.A.

AU - Huttner, U.

AU - Kira, M.

AU - Koch, S. W.

AU - Moloney, J. V.

AU - Joshi, C.

PY - 2019/10/14

Y1 - 2019/10/14

N2 - The nonlinear optical response of GaAs is studied using extremely nonresonant 10 µm laser pulses with peak intensities greater than 2 GW/cm2. We observe over an order of magnitude enhancement in the four-wave mixing efficiency by decreasing the CO2 laser beat-wave frequency. This enhancement is attributed to currents of photoexcited unbound carriers modulated at the beat frequency, confirmed by measurements of nonlinear absorption at this long wavelength as well as a fully microscopic analysis of the excitation dynamics. Modeling of such nonperturbative semiconductor-laser interactions predicts that further decreasing the beat frequency can increase the nonlinear response and allow for its control over two orders of magnitude.

AB - The nonlinear optical response of GaAs is studied using extremely nonresonant 10 µm laser pulses with peak intensities greater than 2 GW/cm2. We observe over an order of magnitude enhancement in the four-wave mixing efficiency by decreasing the CO2 laser beat-wave frequency. This enhancement is attributed to currents of photoexcited unbound carriers modulated at the beat frequency, confirmed by measurements of nonlinear absorption at this long wavelength as well as a fully microscopic analysis of the excitation dynamics. Modeling of such nonperturbative semiconductor-laser interactions predicts that further decreasing the beat frequency can increase the nonlinear response and allow for its control over two orders of magnitude.

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Control of the nonlinear response of bulk GaAs induced by long-wavelength infrared pulses

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