Comparison of photoexcited p-InAs THz radiation source with conventional thermal radiation sources

Authors

Michael Smith, National Museum of AustraliaFollow
Rajind Mendis, University of WollongongFollow
Rodney E. Vickers, University of WollongongFollow
Roger A. Lewis, University of WollongongFollow

RIS ID

25822

Publication Details

Smith, M., Mendis, R., Vickers, R. E. and Lewis, R. A. (2009). Comparison of photoexcited p-InAs THz radiation source with conventional thermal radiation sources. Journal of Applied Physics, 105 (6), 1-4.

Abstract

P-type InAs excited by ultrashort optical pulses has been shown to be a strong emitter of terahertz radiation. In a direct comparison between a p-InAs emitter and conventional thermal radiation sources, we demonstrate that under typical excitation conditions p-InAs produces more radiation below 1.2 THz than a globar. By treating the globar as a blackbody emitter we calibrate a silicon bolometer which is used to determine the power of the p-InAs emitter. The emitted terahertz power was found to be 98±10 nW in this experiment.