Dynamics of all the Raman-active coherent phonons in Sb2Te3 revealed via transient reflectivity

Katsura Norimatsu; Masaki Hada; Shuhei Yamamoto; Takao Sasagawa; Masahiro Kitajima; Yosuke Kayanuma; Kazutaka G. Nakamura

doi:10.1063/1.4917384

Dynamics of all the Raman-active coherent phonons in Sb₂Te₃ revealed via transient reflectivity

Katsura Norimatsu, Masaki Hada, Shuhei Yamamoto, Takao Sasagawa, Masahiro Kitajima, Yosuke Kayanuma, Kazutaka G. Nakamura

大学院自然科学研究科

研究成果 › 査読

24 被引用数 (Scopus)

抄録

The phonon dynamics in Sb₂Te₃ is investigated using femtosecond time-resolved reflection measurements. Time evolution of the reflectivity shows the dynamics of all of the Raman-active optical phonons of Sb₂Te₃ (A_1g¹, A_1g², E_g¹, and E_g²). The amplitude of these coherent phonons strongly depends on the polarization of the excitation pulse, which can be explained by the analysis based on the Raman tensors. Fine tuning of the polarization enables the observation of even E_g¹ phonons with small amplitude (Δ R / R ≈ 10^-7) and short decay time (<1 ps).

本文言語	English
論文番号	143102
ジャーナル	Journal of Applied Physics
巻	117
号	14
DOI	https://doi.org/10.1063/1.4917384
出版ステータス	Published - 4月 14 2015

ASJC Scopus subject areas

物理学および天文学（全般）

文献へのアクセス

10.1063/1.4917384

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引用スタイル

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abstract = "The phonon dynamics in Sb2Te3 is investigated using femtosecond time-resolved reflection measurements. Time evolution of the reflectivity shows the dynamics of all of the Raman-active optical phonons of Sb2Te3 (A1g1, A1g2, Eg1, and Eg2). The amplitude of these coherent phonons strongly depends on the polarization of the excitation pulse, which can be explained by the analysis based on the Raman tensors. Fine tuning of the polarization enables the observation of even Eg1 phonons with small amplitude (Δ R / R ≈ 10-7) and short decay time (<1 ps).",

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AU - Kitajima, Masahiro

AU - Kayanuma, Yosuke

AU - Nakamura, Kazutaka G.

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