Broadband terahertz radiation produced in an AgGaSe2 crystal

B. N. Carnio; K. T. Zawilski; P. G. Schunemann; A. Y. Elezzabi

doi:10.1117/12.2546516

2 March 2020 Broadband terahertz radiation produced in an AgGaSe₂ crystal

B. N. Carnio, K. T. Zawilski, P. G. Schunemann, A. Y. Elezzabi

Proceedings Volume 11279, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII; 1127913 (2020) https://doi.org/10.1117/12.2546516
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

The linear and nonlinear optical properties are investigated in a <110>-cut, 485 μm-thick AgGaSe₂ crystal. The linear optical properties are studied by performing terahertz time-domain spectroscopy measurements, which allow the refractive indices and the extinction coefficients to be calculated for the uniaxial AgGaSe₂ crystal. Optical rectification measurements are conducted to investigate the crystal’s nonlinear optical properties, which produce broadband terahertz radiation pulses having spectral components between 0.02 and 4 THz. Due to the large optical rectification coherence length exhibited by the AgGaSe₂ crystal, in-phase terahertz radiation is generated across the entire length of this 485 μm-thick crystal. Therefore, this crystal can be utilized as a source of broadband terahertz radiation in areas such as medicine and security.

Citation Download Citation

B. N. Carnio, K. T. Zawilski, P. G. Schunemann, and A. Y. Elezzabi "Broadband terahertz radiation produced in an AgGaSe₂ crystal", Proc. SPIE 11279, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII, 1127913 (2 March 2020); https://doi.org/10.1117/12.2546516

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