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Crystals 2018, 8(8), 323; https://doi.org/10.3390/cryst8080323

Simultaneous Generation of Two Pairs of Stokes and Terahertz Waves from Coupled Optical Parametric Oscillations with Quasi-Phase-Matching

College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
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Received: 23 July 2018 / Revised: 11 August 2018 / Accepted: 11 August 2018 / Published: 14 August 2018
(This article belongs to the Section Crystal Engineering)
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Abstract

We present a theoretical investigation on simultaneous generation of two pairs of Stokes and terahertz (THz) waves from coupled optical parametric oscillations (OPOs) with a quasi-phase-matching (QPM) scheme. The two pairs of Stokes and THz waves are generated by stimulated polariton scattering (SPS) from periodically-inverted GaP. By analyzing the QPM conditions of coupled OPOs we find that the two THz waves with any frequency below the transverse optical (TO) mode frequency of GaP can be simultaneously generated with a suitable pump wavelength. We calculate the photon flux densities of the two THz waves by solving the coupled wave equations. The calculation results indicate that the two THz waves can be efficiently generated with high pump intensities, particularly in lower THz frequency band. View Full-Text
Keywords: terahertz wave; stimulated polariton scattering; coupled optical parametric oscillation; GaP terahertz wave; stimulated polariton scattering; coupled optical parametric oscillation; GaP
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Li, Z.; Tan, L.; Li, Y.; Yuan, B.; Wang, S.; Wang, M.; Bing, P.; Yuan, S. Simultaneous Generation of Two Pairs of Stokes and Terahertz Waves from Coupled Optical Parametric Oscillations with Quasi-Phase-Matching. Crystals 2018, 8, 323.

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