Carrier Dynamics of a Bismuth Thin Film Accelerated via Intense Terahertz Field

Yasuo Minami; Kotaro Araki; Thang Duy Dao; Thang Duy Dao; Tadaaki Nagao; Tadaaki Nagao; Jun Takeda; Masahiro Kitajima; Masahiro Kitajima; Masahiro Kitajima; Masahiro Kitajima; Ikufumi Katayama

doi:10.1364/CLEO_AT.2014.JW2A.62

CLEO: 2014
OSA Technical Digest (online) (Optica Publishing Group, 2014),
paper JW2A.62
•https://doi.org/10.1364/CLEO_AT.2014.JW2A.62

Carrier Dynamics of a Bismuth Thin Film Accelerated via Intense Terahertz Field

Yasuo Minami, Kotaro Araki, Thang Duy Dao, Tadaaki Nagao, Jun Takeda, Masahiro Kitajima, and Ikufumi Katayama

CLEO: QELS_Fundamental Science 2014

San Jose, California United States
8–13 June 2014
ISBN: 978-1-55752-999-2

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Poster Session 2 (JW2A)

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Y. Minami, K. Araki, T. D. Dao, T. Nagao, J. Takeda, M. Kitajima, and I. Katayama, "Carrier Dynamics of a Bismuth Thin Film Accelerated via Intense Terahertz Field," in CLEO: 2014, OSA Technical Digest (online) (Optica Publishing Group, 2014), paper JW2A.62.

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Abstract

We observed terahertz transmittances to study carrier dynamics in bismuth (Bi) thin film with optical pump-terahertz probe spectroscopy and terahertz pump-terahertz probe spectroscopy. Under the intense terahertz wave illumination, the transmittance of Bi thin film increases, indicating that the effective mass of the carriers becomes heavier due to the carrier acceleration by the intense field. Then, after the terahertz wave illumination, the transmittance decreases due to the carrier increase. With optical illumination, on the other hand, the transmittance does not increase.

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