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Proceedings Paper

Detection of ultrafast THz pulses via electro-absorption in coupled asymmetric quantum wells
Author(s): Chia-Yeh Li; Denis V. Seletskiy; Jeffrey G. Cederberg; Mansoor Sheik-Bahae
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Paper Abstract

We utilize quantum-confined Stark-effect in asymmetric double quantum wells (ADQW) to realize coherent detection of broadband THz pulses. For that, broadband THz transients formed by a two-color air plasma are focused onto ADQW, in turn dynamically shifting the ADQW bands, with the bandedge at ~ 825 nm. Spectrally-resolved detection scheme analyzes absorption modulation signatures imprinted onto the transmitted NIR probe spectrum. Use of only few micron thick samples ensures large detection bandwidth, currently demonstrated up to ~ 15 THz. Time-domain analysis of this signal shows pronounced bi-polar (coherent) as well as small unipolar components of the signal.

Paper Details

Date Published: 20 February 2012
PDF: 7 pages
Proc. SPIE 8260, Ultrafast Phenomena and Nanophotonics XVI, 82600L (20 February 2012); doi: 10.1117/12.907721
Show Author Affiliations
Chia-Yeh Li, The Univ. of New Mexico (United States)
Denis V. Seletskiy, The Univ. of New Mexico (United States)
Air Force Research Lab. (United States)
Jeffrey G. Cederberg, Sandia National Labs. (United States)
Mansoor Sheik-Bahae, The Univ. of New Mexico (United States)


Published in SPIE Proceedings Vol. 8260:
Ultrafast Phenomena and Nanophotonics XVI
Markus Betz; Abdulhakem Y. Elezzabi; Jin-Joo Song; Kong-Thon Tsen, Editor(s)

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