Measurements of the THz absorption and dispersion of ZnTe and their relevance to the electro-optic detection of THz radiation
- 7 June 1999
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 74 (23) , 3450-3452
- https://doi.org/10.1063/1.124124
Abstract
Via THz time-domain spectroscopy, we have measured the absorption and index of refraction of single-crystal 〈110〉 ZnTe from 0.3 to 4.5 THz. We find that the absorption is dominated by two lower-frequency phonon lines at 1.6 and 3.7 THz and not by the transverse-optical (TO) -phonon line at 5.3 THz as previously assumed. However, the index of refraction is determined mainly by the TO-phonon line. Using these data, we discuss a frequency-domain picture of electro-optic detection of THz radiation below the TO-phonon resonance and compare with the photoconductive THz receiver over the same frequency range.Keywords
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