Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals

Wei-Chen Chu; Shin An Ku; Harn Jiunn Wang; Chih Wei Luo; Yu M Andreev; Grigory Lanskii; T Kobayashi

doi:10.1364/OL.37.000945

Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals

Opt Lett. 2012 Mar 1;37(5):945-7. doi: 10.1364/OL.37.000945.

Authors

Wei-Chen Chu¹, Shin An Ku, Harn Jiunn Wang, Chih Wei Luo, Yu M Andreev, Grigory Lanskii, T Kobayashi

Affiliation

¹ Department of Electrophysics, National Chiao-Tung University, Hsinchu, Taiwan.

PMID: 22378447
DOI: 10.1364/OL.37.000945

Abstract

We demonstrate the widely linear and broadband terahertz (THz) generation on GaSe:Te crystals by femtosecond laser pulses. It was found that the dopant, Te atoms, in GaSe crystals significantly enhances the efficiency of THz generation, and its central frequency can be tuned by varying the crystal thickness through non-phase-matched optical rectification. Moreover, the wide-ranging linearity for the optical-to-THz conversion and central-frequency-tunable THz generation promise for GaSe:Te crystals to be potential materials for high-power (>1.36 μW) THz applications.