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Broadband terahertz generation near the reststrahlen band in LiNbO3 waveguides
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Paper Abstract

Waveguides having a lithium niobate (LiNbO3) core are investigated for the generation of terahertz (THz) radiation, where second-order nonlinear susceptibility enhancement is utilized to produce the THz radiation via optical rectification. Although reststrahlen band losses are high in the vicinity where the nonlinear susceptibility exhibits enhancement, these losses are avoided by restricting the core to have sub-micron dimensions, thus allowing the generated THz radiation to propagate along the guide with >90% of its intensity outside the lossy LiNbO3 core. The generated radiation exhibits a spectral distribution having a central frequency of 5.6 THz and a full-width half maximum bandwidth of 1.3 THz. The THz electric field pulse has an amplitude of 2 kV/cm and is produced at the conversion efficiency of 0.025%.

Paper Details

Date Published: 1 March 2019
PDF: 6 pages
Proc. SPIE 10917, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII, 109170U (1 March 2019); doi: 10.1117/12.2507947
Show Author Affiliations
B. N. Carnio, Univ. of Alberta (Canada)
A. Y. Elezzabi, Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 10917:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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