Bayesian spectroscopy on polarization dependent photoluminescence spectra of doubly-split excitons in a Cu2O thin-crystal sandwiched by MgO substrates

Material type: 文書・図像類

Author: Kiridoshi, Arisaほか

Publisher: Wiley

Publication date: 2018-07-19

Material Format: Digital

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Note (General)：: type:プレプリントBy using Bayesian spectroscopy, we studied polarization dependence of photoluminescence (PL) spectra in doubly-split 1S yellow ortho-excito...

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Material Type: 文書・図像類
Title: Bayesian spectroscopy on polarization dependent photoluminescence spectra of doubly-split excitons in a Cu2O thin-crystal sandwiched by MgO substrates
Author/Editor: Kiridoshi, Arisa
Aihara, Shingo
Arishima, Syunshiro
Yamashiro, Tetsuya
Mizumaki, Masaichiro
Iwamitsu, Kazunori
Akai, Ichiro
切通, 愛莉紗
相原, 慎吾
有嶋, 駿士郎
山代, 哲也
岩満, 一功
赤井, 一郎
Author Heading: Kiridoshi, Arisa
Aihara, Shingo
Arishima, Syunshiro
Yamashiro, Tetsuya
Mizumaki, Masaichiro
Iwamitsu, Kazunori
Akai, Ichiro
切通, 愛莉紗
相原, 慎吾
有嶋, 駿士郎
山代, 哲也
岩満, 一功
赤井, 一郎
Publication, Distribution, etc.: Wiley
Publication Date: 2018-07-19
Publication Date (W3CDTF): 2018-07-19
Periodical title: physica status solidi B
No. or year of volume/issue: 255 11
Volume: 255
Issue: 11
Pages: 1800136-1-1800136-9
ISSN (Periodical Title): ISSN : 0370-1972
Text Language Code: eng
Subject Heading: Bayesian spectroscopy
exciton
biaxial stress effect
polarization dependence
Cu2O
425.5
Target Audience: 一般
Note (General): type:プレプリント
By using Bayesian spectroscopy, we studied polarization dependence of photoluminescence (PL) spectra in doubly-split 1S yellow ortho-excitons in a Cu2O thin-crystal recrystallized in a small gap between paired MgO substrates. In these thin-crystals, biaxial stresses are expected to be involved due to a small lattice mismatch between Cu2O and MgO. The ortho-exciton state splits into two states due to symmetry lowering. To elucidate such biaxial stress effect, we measured polarization dependence of the PL spectra. Although resonant weak PL bands of the doubly-split exciton states and their intense phonon sidebands co-exist, we succeeded in decomposing to the respective spectral components by the Bayesian spectroscopy. As a result, it was found that the resonant PL band appearing on higher energy side shows hardly polarization dependence, whereas the resonant PL band at lower energy side is further weak and shows polarization dependence. These results can be explained by the selection rule and polarization dependences on the transition matrix elements of quadrupole transitions of the ortho-exciton states, and it clearly shows that the crystal symmetry degrades to tetragonal one by the isotropic biaxial stress involved in the Cu2O thin-crystals.
identifier:https://onlinelibrary.wiley.com/doi/abs/10.1002/pssb.201800136
Access Restrictions: 限定公開
Related Material (DOI): 10.1002/pssb.201800136
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 熊本大学 : 熊本大学学術リポジトリ