Generation of continuous-wave THz radiation by use of quantum interference

Details Generation of continuous-wave THz radiation by use of quantum interference Generation of continuous-wave THz radiation by use of quantum interference

1999-12-13

arxiv.org/abs/quant-ph/9912062v1

Physics

Quantum Physics

18 pages, 4 figures

Scientific paper

10.1364/JOSAB.17.001405

We propose a scheme for generation of continuous-wave THz radiation. The scheme requires a medium where three discrete states in a $\Lambda $ configuration can be selected, with the THz-frequency transition between the two lower metastable states. We consider the propagation of three-frequency continuous-wave electromagnetic (e.m.) radiation through a $\Lambda $ medium. Under resonant excitation, the medium absorption can be strongly reduced due to quantum interference of transitions, while the nonlinear susceptibility is enhanced. This leads to very efficient energy transfer between the e.m. waves providing a possibility for THz generation. We demonstrate that the photon conversion efficiency is approaching unity in this technique.

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