Theoretical research on cascaded terahertz difference-frequency generation based on sphalerite crystals

Jing-hui Li; Xi-fu Li; Hui-yun Zhang; Yu-ping Zhang; Mayilamu Musideke; Jian-quan Yao

doi:10.1007/s11801-012-2236-3

Optoelectronics Letters ›› 2012, Vol. 8 ›› Issue (5) : 389 -392. DOI: 10.1007/s11801-012-2236-3

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Theoretical research on cascaded terahertz difference-frequency generation based on sphalerite crystals

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Abstract

A theoretical model of cascaded terahertz (THz) difference-frequency generation is established based on one-dimensional coupled-wave equations. The relationships between sphalerite crystals’ wave vector mismatches and difference-frequency pump waves are analyzed. To produce terahertz wave with the frequency of 1.5 THz, 80-order cascaded difference-frequency is applied. By introducing crystal absorption, we calculate the optimum crystal length and pump frequency under actual circumstances. It is found that Stokes waves dominate the terahertz waves output in cascaded progress, and cascaded difference-frequency can increase the photon conversion efficiency obviously.

Keywords

GaAs / ZnTe / Pump Wave / Stokes Wave / Terahertz Wave

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Jing-hui Li, Xi-fu Li, Hui-yun Zhang, Yu-ping Zhang, Mayilamu Musideke, Jian-quan Yao. Theoretical research on cascaded terahertz difference-frequency generation based on sphalerite crystals. Optoelectronics Letters, 2012, 8(5): 389-392 DOI:10.1007/s11801-012-2236-3

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