Methods and apparatus for generating terahertz radiation Patent uri icon


  • 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 (?(2)) integrated in an active region of the QCL. The QCL is configured to generate first radiation at a first frequency ?1, second radiation at a second frequency ?2, and third radiation at a third frequency ?3=?1??2 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.

author list (cited authors)

  • Belkin, M., Capasso, F., & Belyanin, A.

complete list of authors

  • Belkin, Mikhail||Capasso, Federico||Belyanin, Alexey

publication date

  • January 1, 2011 11:11 AM