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Proceedings Paper

Birefringence, absorption, and optical rectification of a chalcopyrite CdSiP2 crystal in the terahertz frequency regime
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Paper Abstract

Linear and nonlinear terahertz (THz) phenomenon are studied in a cadmium silicon phosphide, CdSiP2, crystal. The ~2 THz phonon mode of the CdSiP2 crystal is probed via THz spectroscopy experiments, allowing phonon-polariton dispersion to be observed in the recorded time-domain signals. In the frequency range of 0.5-2.9 THz, the refractive indices of this uniaxial crystal are determined (allowing the material’s birefringence to be calculated), along with the material’s extinction coefficients. Using a 780 nm central-wavelength pump pulse having a duration of 50 fs, THz generation is achieved in the non-centrosymmetric CdSiP2 crystal. The resulting THz electric field pulse has a bandwidth ranging from 0.07-6 THz. The results of this study suggest CdSiP2 has the potential to find use as low-loss THz waveplates in the frequency range of 0.5-1.9 THz, as well as a broadband THz source.

Paper Details

Date Published: 23 February 2018
PDF: 6 pages
Proc. SPIE 10531, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI, 105311P (23 February 2018); doi: 10.1117/12.2290739
Show Author Affiliations
B. N. Carnio, Univ. of Alberta (Canada)
K. T. Zawilski, BAE Systems (United States)
P. G. Schunemann, BAE Systems (United States)
A. Y. Elezzabi, Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 10531:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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