Methods and apparatus for generating terahertz radiation

Details Methods and apparatus for generating terahertz radiation Methods and apparatus for generating terahertz radiation

2011-07-05

2011-07-05

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S045010

Reexamination Certificate

active

07974325

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−ω2based 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.

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