14 March 2013 Observation of strong and broadband terahertz induced electroabsorption in multiple quantum wells
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Abstract
We report the observation of strong terahertz-induced electroabsoption (EA) modulation in in multiple double quantum well (MDQW) structures Broadband terahertz generated by two-color laser induced plasma is focused (~1MV/cm) onto the MQW and spectro-temporal response is probed in transmission geometry, where up to 60% modulation signals are observed. EAS signal is attributed to several mechanisms, including observed qualitative agreement with the two-dimensional Franz-Keldysh response. Utilizing strong EA signals, we present a simple THz imaging scheme using conventional imagers.
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Chia-Yeh Li, Denis V. Seletskiy, Jeffrey G. Cederberg, Mansoor Sheik-Bahae, "Observation of strong and broadband terahertz induced electroabsorption in multiple quantum wells", Proc. SPIE 8623, Ultrafast Phenomena and Nanophotonics XVII, 86230O (14 March 2013); doi: 10.1117/12.2004633; https://doi.org/10.1117/12.2004633
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