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Proceedings Paper

Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells
Author(s): K. Uchida; H. Hirori; T. Aoki; C. Wolpert; K. Tanaka; T. Mochizuki; C. Kim; M. Yoshita; H. Akiyama; L. N. Pfeiffer; K. W. West
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Paper Abstract

By means of THz pump and optical probe spectroscopy, we observed that the incident THz pulse induces a strong spectral modulation of the 1s heavy-hole exciton peak of GaAs quantum wells due to Rabi splitting. Our precise measurements in the time domain show that the Rabi splitting follows the instantaneous THz electric pulse at extremely strong fields but persists up to a negative delay time of ~1 ps at weak fields. This field dependent dynamics of the Rabi splitting indicates that the excitonic field ionization governs a nonperturbative nonlinear dynamics of excitons by causing a reduction of the dephasing time

Paper Details

Date Published: 14 March 2015
PDF: 6 pages
Proc. SPIE 9361, Ultrafast Phenomena and Nanophotonics XIX, 93611G (14 March 2015); doi: 10.1117/12.2078419
Show Author Affiliations
K. Uchida, Kyoto Univ. (Japan)
H. Hirori, Kyoto Univ. (Japan)
Japan Science and Technology Agency (Japan)
T. Aoki, Japanese and Technology Agency (Japan)
Waseda Univ. (Japan)
C. Wolpert, Kyoto Univ. (Japan)
Japan Science and Technology Agency (Japan)
K. Tanaka, Kyoto Univ. (Japan)
Japan Science and Technology Agency (Japan)
T. Mochizuki, The Univ. of Tokyo (Japan)
JST-CREST (Japan)
C. Kim, The Univ. of Tokyo (Japan)
JST-CREST (Japan)
M. Yoshita, The Univ. of Tokyo (Japan)
JST-CREST (Japan)
H. Akiyama, The Univ. of Tokyo (Japan)
JST-CREST (Japan)
L. N. Pfeiffer, Princeton Univ. (United States)
K. W. West, Princeton Univ. (United States)


Published in SPIE Proceedings Vol. 9361:
Ultrafast Phenomena and Nanophotonics XIX
Markus Betz; Abdulhakem Y. Elezzabi; Kong-Thon Tsen, Editor(s)

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