Photostrictive characteristics in Perovskite Strontium Iridate Thin Films

ORAL

Abstract

Photostrictive effect depicts a direct light-matter interaction that exhibits a reversible mechanical deformation in a material under light illumination. In this work, we investigate the giant visible-light-induced deformation of orthorhombic perovskite SrIrO3 (SIO), taking advantages of its sizable crystal field and high absorption across the visible spectrum at room temperature. By using highly structural sensitive in-situ Raman spectroscopy, the red-shift behaviors of all the optical phonons of SIO were observed as the increase of light intensities. The corresponding local strain states were analyzed by means of the phonon deformation potential theory, which unveils the giant photostrictive behavior in SIO thin films. The fast response time is also discovered by ultra-fast pump probe spectroscopy. We found that SIO shows significant photostriction properties compared to conventional semiconductors, polymers and perovskite oxides. The strong photostrictive effect, fast response time and superior stability of SIO at room temperature pave a promising route towards new applications and multifunctionalities of photon-driven devices.

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Presenters

  • Yi-De Liou

    • Physics, National Cheng Chung University
    • Physics, National Cheng Kung University
    • National Cheng Kung University, Tainan 70101, Taiwan
    • Department of Physics, National Cheng Kung University

Authors

  • Yi-De Liou

    • Physics, National Cheng Chung University
    • Physics, National Cheng Kung University
    • National Cheng Kung University, Tainan 70101, Taiwan
    • Department of Physics, National Cheng Kung University

  • Wen-Yen Tzeng

    • Electrophysics, National Chiao Tung University

  • Heng-Jui Liu

    • National Chung Hsing University
    • Materials Science and Engineering, National Chung Hsing University

  • Chih Wei Luo

    • Electrophysics, National Chiao Tung University

  • Yi-Chun Chen

    • Physics, National Cheng Chung University
    • Physics, National Cheng Kung University
    • National Cheng Kung University, Tainan 70101, Taiwan
    • Department of Physics, National Cheng Kung University

  • Ying-Hao Chu

    • Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan; and Institute of Physics, Academia Sinica, Taipei, Taiwan
    • Department of Materials Science and Engineering, National Chiao Tung University
    • National Chiao Tung University
    • Materials Science and Engineering, National Chiao Tung University
    • National Chiao Tung University, Hsinchu 30010, Taiwan

  • Jan-Chi Yang

    • Physics, National Cheng Chung University
    • Physics, National Cheng Kung University
    • Department of Physics, National Cheng Kung University