Photon energy dependence of kerr rotation in chalcogenide superlattices

Takara Suzuki; Richarj Mondal; Yuta Saito; Paul Fons; Alexander V. Kolobov; Junji Tominaga; Hidemi Shigekawa; Muneaki Hase

Photon energy dependence of kerr rotation in chalcogenide superlattices

Takara Suzuki, Richarj Mondal, Yuta Saito, Paul Fons, Alexander V. Kolobov, Junji Tominaga, Hidemi Shigekawa, Muneaki Hase

Department of Electronics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We report on pump-probe based helicity dependent time-resolved Kerr measurements of chalcogenide superlattices, consisting of alternately stacked GeTe and Sb2Te3 layers under infrared excitation. The Kerr rotation signal consists of the specular Inverse Faraday effect (SIFE) and the specular optical Kerr effect (SOKE), both of which are found to monotonically increase with decreasing photon energy over a sub-eV energy range. Although the dependence of the SIFE can be attributed to a response function of direct third-order nonlinear susceptibility, the magnitude of the SOKE reflects cascading second-order nonlinear susceptibility resulting from electronic transitions from bulk valence band to interface-originating Dirac states of the superlattice.

Original language	English
Journal	Unknown Journal
Publication status	Published - 2019 Jul 17

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@article{87496e9271de4f4fbdf659b77e71984f,

title = "Photon energy dependence of kerr rotation in chalcogenide superlattices",

abstract = "We report on pump-probe based helicity dependent time-resolved Kerr measurements of chalcogenide superlattices, consisting of alternately stacked GeTe and Sb2Te3 layers under infrared excitation. The Kerr rotation signal consists of the specular Inverse Faraday effect (SIFE) and the specular optical Kerr effect (SOKE), both of which are found to monotonically increase with decreasing photon energy over a sub-eV energy range. Although the dependence of the SIFE can be attributed to a response function of direct third-order nonlinear susceptibility, the magnitude of the SOKE reflects cascading second-order nonlinear susceptibility resulting from electronic transitions from bulk valence band to interface-originating Dirac states of the superlattice.",

author = "Takara Suzuki and Richarj Mondal and Yuta Saito and Paul Fons and Kolobov, {Alexander V.} and Junji Tominaga and Hidemi Shigekawa and Muneaki Hase",

year = "2019",

month = jul,

day = "17",

language = "English",

journal = "Mathematical Social Sciences",

issn = "0165-4896",

publisher = "Elsevier",

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TY - JOUR

T1 - Photon energy dependence of kerr rotation in chalcogenide superlattices

AU - Suzuki, Takara

AU - Mondal, Richarj

AU - Saito, Yuta

AU - Fons, Paul

AU - Kolobov, Alexander V.

AU - Tominaga, Junji

AU - Shigekawa, Hidemi

AU - Hase, Muneaki

PY - 2019/7/17

Y1 - 2019/7/17

N2 - We report on pump-probe based helicity dependent time-resolved Kerr measurements of chalcogenide superlattices, consisting of alternately stacked GeTe and Sb2Te3 layers under infrared excitation. The Kerr rotation signal consists of the specular Inverse Faraday effect (SIFE) and the specular optical Kerr effect (SOKE), both of which are found to monotonically increase with decreasing photon energy over a sub-eV energy range. Although the dependence of the SIFE can be attributed to a response function of direct third-order nonlinear susceptibility, the magnitude of the SOKE reflects cascading second-order nonlinear susceptibility resulting from electronic transitions from bulk valence band to interface-originating Dirac states of the superlattice.

AB - We report on pump-probe based helicity dependent time-resolved Kerr measurements of chalcogenide superlattices, consisting of alternately stacked GeTe and Sb2Te3 layers under infrared excitation. The Kerr rotation signal consists of the specular Inverse Faraday effect (SIFE) and the specular optical Kerr effect (SOKE), both of which are found to monotonically increase with decreasing photon energy over a sub-eV energy range. Although the dependence of the SIFE can be attributed to a response function of direct third-order nonlinear susceptibility, the magnitude of the SOKE reflects cascading second-order nonlinear susceptibility resulting from electronic transitions from bulk valence band to interface-originating Dirac states of the superlattice.

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AN - SCOPUS:85095213710

JO - Mathematical Social Sciences

JF - Mathematical Social Sciences

SN - 0165-4896

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