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Terahertz radiation device and method of generating terahertz radiation

Patent image
CCDC ARL

A method and device for generating terahertz radiation comprising a substrate; a plurality of segments of polar crystal material formed on the substrate, the segments having an internal electric polarization; each segment comprising at least two edges oriented substantially perpendicular to the polar axis such that the electric polarization terminates at the edges and the segment comprises a majority of positive charges on one edge and a majority of negative charges on the opposite edge thereby leading to creation of an internal electric field; whereby when irradiated by a pulsed source of duration less than one picosecond, electron-hole pairs are generated within the segments and the internal electric field separates and accelerates the electron-hole pairs to thereby produce terahertz radiation.

Inventors: 
Wraback, Michael; Shen, Paul H.
Patent Number: 
Technical domain: 
Optics
FIle Date: 
2011-03-08
Grant Date: 
2012-09-18
Grant time: 
560 days
Grant time percentile rank: 
10
Claim count percentile rank: 
6
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US ARMY