Ultrafast Giant Photostriction of Epitaxial Strontium Iridate Film with Superior Endurance

Jan Chi Yang, Yi De Liou, Wen Yen Tzeng, Heng Jui Liu, Yao Wen Chang, Ping Hua Xiang, Zaoli Zhang, Chun Gang Duan, Chih-Wei Luo, Yi Chun Chen, Ying-hao Chu*


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21 引文 斯高帕斯(Scopus)


Photostriction, optical stimulus driven mechanical deformation in materials, provides a solution toward next-generation technology. Here, the giant photostriction (∼2% change of lattice) of epitaxial strontium iridate (SrIrO 3 ) films under illumination at room temperature is revealed via power-dependent Raman scattering, which is significantly larger as compared to conventional inorganic materials. The time scale and mechanism of this giant photostriction in SrIrO 3 are further studied through time-resolved transient reflectivity measurements. The main mechanism is determined to be the electron-phonon coupling. In addition, we find that such an exotic behavior happens within few picoseconds and remains up to 10 7 cyclic on/off operations. The observation of giant photostriction in SrIrO 3 films with superior endurance promises the advance of shape responsive solids that are sensitive to environmental stimuli, which could be widely utilized for multifunctional optoelectronics and optomechanical devices.

頁(從 - 到)7742-7748
期刊Nano Letters
出版狀態Published - 12 12月 2018


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