Physics
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4823..104n&link_type=abstract
Photonics for Space Environments VIII. Edited by Taylor, Edward W. Proceedings of the SPIE, Volume 4823, pp. 104-112 (2002).
Physics
Scientific paper
In the presence of a time-dependent external source such as a bias electric field or an incident optical flux, electrons in quantum well and quantum dot devices experience non-adiabatic transport through the barrier layer between two adjacent quantum wells or quantum dots. This non-adiabatic transport process induces charge density fluctuations, resulting in several transient phenomena. When a time-dependent electric field is applied to the system, a dynamical breakdown (i.e., the dark current is dominated by a dielectric displacement current) of the quantum well or quantum dot photodetector is observed. If a chopped time-dependent optical flux is incident on either system, a dynamical drop in the photo-responsivity with increasing chopping frequency is also observed.
Cardimona David A.
Huang Dan Hong
Krishna Sanjay
Le Dang T.
Morath Christian P.
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