Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells

K. Uchida; H. Hirori; Takao Aoki; C. Wolpert; K. Tanaka; T. Mochizuki; C. Kim; M. Yoshita; H. Akiyama; L. N. Pfeiffer; K. W. West

doi:10.1117/12.2078419

Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells

K. Uchida, H. Hirori, Takao Aoki, C. Wolpert, K. Tanaka, T. Mochizuki, C. Kim, M. Yoshita, H. Akiyama, L. N. Pfeiffer, K. W. West

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	Ultrafast Phenomena and Nanophotonics XIX
Publisher	SPIE
Volume	9361
ISBN (Print)	9781628414516
DOIs	https://doi.org/10.1117/12.2078419
Publication status	Published - 2015
Event	Ultrafast Phenomena and Nanophotonics XIX - San Francisco, United States Duration: 2015 Feb 8 → 2015 Feb 11

Other

Other	Ultrafast Phenomena and Nanophotonics XIX
Country	United States
City	San Francisco
Period	15/2/8 → 15/2/11

Keywords

Exciton
Nonlinear optics
Quantum well
THz spectroscopy
Ultrafast phenomena

ASJC Scopus subject areas

Applied Mathematics
Computer Science Applications
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Uchida, K., Hirori, H., Aoki, T., Wolpert, C., Tanaka, K., Mochizuki, T., Kim, C., Yoshita, M., Akiyama, H., Pfeiffer, L. N., & West, K. W. (2015). Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells. In Ultrafast Phenomena and Nanophotonics XIX (Vol. 9361). [93611L] SPIE. https://doi.org/10.1117/12.2078419

Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells. / Uchida, K.; Hirori, H.; Aoki, Takao; Wolpert, C.; Tanaka, K.; Mochizuki, T.; Kim, C.; Yoshita, M.; Akiyama, H.; Pfeiffer, L. N.; West, K. W.

Ultrafast Phenomena and Nanophotonics XIX. Vol. 9361 SPIE, 2015. 93611L.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Uchida, K, Hirori, H, Aoki, T, Wolpert, C, Tanaka, K, Mochizuki, T, Kim, C, Yoshita, M, Akiyama, H, Pfeiffer, LN & West, KW 2015, Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells. in Ultrafast Phenomena and Nanophotonics XIX. vol. 9361, 93611L, SPIE, Ultrafast Phenomena and Nanophotonics XIX, San Francisco, United States, 15/2/8. https://doi.org/10.1117/12.2078419

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keywords = "Exciton, Nonlinear optics, Quantum well, THz spectroscopy, Ultrafast phenomena",

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AU - Hirori, H.

AU - Aoki, Takao

AU - Wolpert, C.

AU - Tanaka, K.

AU - Mochizuki, T.

AU - Kim, C.

AU - Yoshita, M.

AU - Akiyama, H.

AU - Pfeiffer, L. N.

AU - West, K. W.

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AB - 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.

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KW - Nonlinear optics

KW - Quantum well

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