Submillimeter p-Ge laser using a permanent magnet in Voigt configuration

Kijun Park; Robert E. Peale; Henry Weidner; Jin J. Kim

doi:10.1117/12.224259

13 October 1995 Submillimeter p-Ge laser using a permanent magnet in Voigt configuration

Kijun Park, Robert E. Peale, Henry Weidner, Jin J. Kim

Proceedings Volume 2558, Millimeter and Submillimeter Waves II; (1995) https://doi.org/10.1117/12.224259
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Laser emission near 100 micrometers from intervalence band transitions of p-type Ge in E (perpendicular) B fields is reported. Our idea is to substitute a Voigt configured permanent magnet for the traditional superconducting one. We compare the results using this new design with our results using a Faraday-configured superconducting magnet. Emission is observed at much lower electric-field pulse magnitude in Voigt configuration. The use of a variable temperature cryostat has allowed detailed temperature dependence of the emission to be studied down to 1.7 K. The emission-strength peaks around 2 K, and a rapid decrease below 2 K has been observed. Heating limits the rep rate, but we have observed emission up to 30 Hz with our permanent magnet. Observation of submm emission from a Voigt-configured p-Ge laser using a permanent magnet represents a breakthrough in practicality because it considerably simplifies the device and eliminates the necessity of liquid helium, in principle.

Citation Download Citation

Kijun Park, Robert E. Peale, Henry Weidner, and Jin J. Kim "Submillimeter p-Ge laser using a permanent magnet in Voigt configuration", Proc. SPIE 2558, Millimeter and Submillimeter Waves II, (13 October 1995); https://doi.org/10.1117/12.224259

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