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Proceedings Paper

Accessing new types of photocurrents using polarization-shaped excitation pulses
Author(s): Shekhar Priyadarshi; Klaus Pierz; Mark Bieler
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Paper Abstract

The excitation of exciton resonances in semiconductors with certain polarization-shaped optical pulses reveals the existence of new photocurrents. For resonant excitation of excitons with an optical pulse whose linear polarization is slowly rotating versus time we observe an antisymmetric shift current linked to a second-order nonlinear tensor that is antisymmetric in its last two Cartesian indices. Moreover, for non-resonant excitation of excitons with an elliptically polarized optical pulse whose major and minor axis slowly decreases and increases in time and become minor and major axis, respectively, we observe an additional symmetric shift current being associated with a second-order nonlinear tensor that is symmetric in its last two Cartesian indices. Both of these currents vanish for continuous-wave excitation and, thus, differ from previously known shift currents.

Paper Details

Date Published: 14 March 2013
PDF: 15 pages
Proc. SPIE 8623, Ultrafast Phenomena and Nanophotonics XVII, 86231B (14 March 2013); doi: 10.1117/12.2003131
Show Author Affiliations
Shekhar Priyadarshi, Physikalisch-Technische Bundesanstalt (Germany)
Klaus Pierz, Physikalisch-Technische Bundesanstalt (Germany)
Mark Bieler, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 8623:
Ultrafast Phenomena and Nanophotonics XVII
Markus Betz; Abdulhakem Y. Elezzabi; Jin-Joo Song; Kong-Thon Tsen, Editor(s)

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