Abstract
We report the measurement of exceptionally bright, incoherent radiation in the THz region by frequency down-conversion of amplified spontaneous emission around 775-nm wavelength. The down-conversion technique is optical mixing in an interdigital photoconductive capacitor made from ultra fast ErAs:GaAs. The brightness temperature into a single spatial mode is approximately 1.1×105 K, making the new radiation at least 70 times more intense than common incandescent sources in the THz region.
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Brown, E., Bjarnason, J., Wilkinson, T. et al. Bright MM-Wave and THz Luminescence by Down-Conversion of Near-IR Amplified-Spontaneous-Emission. Int J Infrared Milli Waves 26, 1691–1702 (2005). https://doi.org/10.1007/s10762-005-0290-7
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DOI: https://doi.org/10.1007/s10762-005-0290-7