TY - JOUR
T1 - Dynamics of all the Raman-active coherent phonons in Sb2Te3 revealed via transient reflectivity
AU - Norimatsu, Katsura
AU - Hada, Masaki
AU - Yamamoto, Shuhei
AU - Sasagawa, Takao
AU - Kitajima, Masahiro
AU - Kayanuma, Yosuke
AU - Nakamura, Kazutaka G.
N1 - Publisher Copyright:
© 2015 AIP Publishing LLC.
PY - 2015/4/14
Y1 - 2015/4/14
N2 - 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).
AB - 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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U2 - 10.1063/1.4917384
DO - 10.1063/1.4917384
M3 - Article
AN - SCOPUS:84928390460
SN - 0021-8979
VL - 117
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 14
M1 - 143102
ER -