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Updated: May 24, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals
Wei-Chen Chu1, Shin An Ku, Harn Jiunn Wang
1Department of Electrophysics, National Chiao-Tung University, Hsinchu, Taiwan.
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.

