Ultrafast Giant Photostriction of Epitaxial Strontium Iridate Film with Superior Endurance
| Autor: | Yao Wen Chang, Jan Chi Yang, Heng Jui Liu, Yi De Liou, Zaoli Zhang, Chun-Gang Duan, Ping-Hua Xiang, Yi-Chun Chen, Wen Yen Tzeng, Ying-Hao Chu, Chih-Wei Luo |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Complex oxide chemistry.chemical_element Bioengineering 02 engineering and technology Epitaxy 01 natural sciences symbols.namesake 0103 physical sciences General Materials Science 010306 general physics Strontium business.industry Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Reflectivity chemistry Picosecond symbols Optoelectronics Inorganic materials 0210 nano-technology business Ultrashort pulse Raman scattering |
| Zdroj: | Nano letters. 18(12) |
| ISSN: | 1530-6992 |
| Popis: | 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 (SrIrO3) 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 SrIrO3 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 107 cyclic on/off operations. The observation of giant photostriction in SrIrO3 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. |
| Databáze: | OpenAIRE |
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