Terahertz radiation device and method of generating terahertz radiation
US8269200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2011 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Apr 18, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/13
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.