Generation of terahertz radiation in orientation-patterned...

Details Generation of terahertz radiation in orientation-patterned... Generation of terahertz radiation in orientation-patterned...

2008-03-04

2008-03-04

Connelly-Cushwa, Michelle R. (Department: 2874)

Optical: systems and elements

Optical frequency converter

C359S330000

Reexamination Certificate

active

11357722

ABSTRACT:
A method for generating THz radiation comprises illuminating a semiconductor crystal with an optical pulse train. The semiconductor crystal comprises alternating parallel crystal domains, with each domain having a crystal orientation inverted with respect to adjacent domains. The optical pulse train propagates substantially perpendicularly relative to domain boundaries in the semiconductor crystal. The THz radiation is generated from the optical pulse train by optical down-conversion mediated by the semiconductor crystal. Optical path lengths through the crystal domains at least in part determine a frequency of the generated THz radiation. THz generation efficiency may be enhanced by placing the semiconductor crystal within an external resonant cavity, by placing the semiconductor crystal within a laser cavity, or by placing the semiconductor crystal within an OPO cavity. The semiconductor crystal may comprise zinc-blende, III-V, or II-VI semiconductor.

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