Methods and apparatus for generating terahertz radiation
Abstract
Apparatus and methods for generating radiation via difference frequency generation (DFG). In one exemplary implementation, a quantum cascade laser (QCL) has a significant second-order nonlinear susceptibility (χ(2)) integrated in an active region of the QCL. The QCL is configured to generate first radiation at a first frequency ω1, second radiation at a second frequency ω2, and third radiation at a third frequency ω3=ω1−ω2 based on difference frequency generation (DFG) arising from the non-linear susceptibility. In one aspect, the QCL may be configured to generate appreciable THz radiation at room temperature.
Subject
372/46.01372/45.01
G02F 1/3534
H01S 5/3402
H01S 1/02
B82Y 20/00
H01S 5/0608
H01S 5/187
H01S 5/0604
H01S 5/1046
H01S 2302/02
H01S 5/1096
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Citation
Belkin, Mikhail A.; Capasso, Federico; Belyanin, Alexey (2011). Methods and apparatus for generating terahertz radiation. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from https : / /hdl .handle .net /1969 .1 /176957.