TY - JOUR
T1 - Element Selectivity in Second-Harmonic Generation of GaFeO3 by a Soft-X-Ray Free-Electron Laser
AU - Yamamoto, Sh
AU - Omi, T.
AU - Akai, H.
AU - Kubota, Y.
AU - Takahashi, Y.
AU - Suzuki, Y.
AU - Hirata, Y.
AU - Yamamoto, K.
AU - Yukawa, R.
AU - Horiba, K.
AU - Yumoto, H.
AU - Koyama, T.
AU - Ohashi, H.
AU - Owada, S.
AU - Tono, K.
AU - Yabashi, M.
AU - Shigemasa, E.
AU - Yamamoto, S.
AU - Kotsugi, M.
AU - Wadati, H.
AU - Kumigashira, H.
AU - Arima, T.
AU - Shin, S.
AU - Matsuda, I.
N1 - Funding Information:
This work was partly supported by the MEXT program “X-Ray Free Electron Laser Priority Strategy Program” and by the Hyogo Science and Technology Association. We thank Masami Fujisawa, Takashi Tokushima, Mihoko Araki, and Yuka Kosegawa for their technical support. The measurement system was tested using facilities of the Synchrotron Radiation Research Organization, The University of Tokyo. We thank Goro Mizutani, Kenji Tamasaku, Yoshihiro Miyauchi, and Takanori Suzuki for valuable discussion about SHG. The XFEL experiments were performed at the BL1 of SACLA with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2016B8078). The XPS measurement was conducted at the BL-2A of Photon Factory (Proposal No. 2016G602). Sh. Y. was supported by the Grant-in-Aid for JSPS Fellows and the Program for Leading Graduate Schools (MERIT).
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/6/1
Y1 - 2018/6/1
N2 - Nonlinear optical frequency conversion has been challenged to move down to the extreme ultraviolet and x-ray region. However, the extremely low signals have allowed researchers to only perform transmission experiments of the gas phase or ultrathin films. Here, we report second harmonic generation (SHG) of the reflected beam of a soft x-ray free-electron laser from a solid, which is enhanced by the resonant effect. The observation revealed that the double resonance condition can be met by absorption edges for transition metal oxides in the soft x-ray range, and this suggests that the resonant SHG technique can be applicable to a wide range of materials. We discuss the possibility of element-selective SHG spectroscopy measurements in the soft x-ray range.
AB - Nonlinear optical frequency conversion has been challenged to move down to the extreme ultraviolet and x-ray region. However, the extremely low signals have allowed researchers to only perform transmission experiments of the gas phase or ultrathin films. Here, we report second harmonic generation (SHG) of the reflected beam of a soft x-ray free-electron laser from a solid, which is enhanced by the resonant effect. The observation revealed that the double resonance condition can be met by absorption edges for transition metal oxides in the soft x-ray range, and this suggests that the resonant SHG technique can be applicable to a wide range of materials. We discuss the possibility of element-selective SHG spectroscopy measurements in the soft x-ray range.
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U2 - 10.1103/PhysRevLett.120.223902
DO - 10.1103/PhysRevLett.120.223902
M3 - Article
C2 - 29906133
AN - SCOPUS:85048231633
SN - 0031-9007
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
M1 - 223902
ER -