| Title | Optically manipulated nanomechanics of semiconductor nanowires |
| Other Titles | Optically manipulated nanomechanics of semiconductor nanowires |
| Authors | 宋晨之 杨是赜 李晓敏 李晓 冯济 潘安练 王文龙 许智 白雪冬 |
| Affiliation | Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences International Center for Quantum Materials and School of Physics, Peking University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, and State Key Laboratory of Chemo/Biosensing and Chemometrics,Hunan University Songshan Lake Materials Laboratory School of Physical Sciences, University of Chinese Academy of Sciences |
| Keywords | opto–electromechanical coupling nano-electromechanical systems(NEMS) in-situ transmission electron microscopy(TEM) semiconductor nanowires |
| Issue Date | 2019 |
| Publisher | Chinese Physics B |
| Abstract | Opto–electromechanical coupling at the nanoscale is an important topic in new scientific studies and technical applications. In this work, the optically manipulated electromechanical behaviors of individual cadmium sulfide(CdS) nanowires are investigated by a customer-built optical holder inside transmission electron microscope, wherein in situ electromechanical resonance took place in conjunction with photo excitation. It is found that the natural resonance frequency of the nanowire under illumination becomes considerably lower than that under darkness. This redshift effect is closely related to the wavelength of the applied light and the diameter of the nanowires. Density functional theory(DFT) calculation shows that the photoexcitation leads to the softening of CdS nanowires and thus the redshift of natural frequency, which is in agreement with the experimental results. Opto–electromechanical coupling at the nanoscale is an important topic in new scientific studies and technical applications. In this work, the optically manipulated electromechanical behaviors of individual cadmium sulfide(CdS) nanowires are investigated by a customer-built optical holder inside transmission electron microscope, wherein in situ electromechanical resonance took place in conjunction with photo excitation. It is found that the natural resonance frequency of the nanowire under illumination becomes considerably lower than that under darkness. This redshift effect is closely related to the wavelength of the applied light and the diameter of the nanowires. Density functional theory(DFT) calculation shows that the photoexcitation leads to the softening of CdS nanowires and thus the redshift of natural frequency, which is in agreement with the experimental results. |
| URI | http://hdl.handle.net/20.500.11897/562116 |
| ISSN | 1674-1056 |
| Appears in Collections: | 物理学院 |
