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Vibrational modes of GaAs hexagonal nanopillar arrays studied with ultrashort optical pulses
| Title: | Vibrational modes of GaAs hexagonal nanopillar arrays studied with ultrashort optical pulses |
| Authors: | Sakuma, Hirotaka Browse this author | | Tomoda, Motonobu Browse this author →KAKEN DB | | Otsuka, Paul H. Browse this author | | Matsuda, Osamu Browse this author →KAKEN DB | | Wright, Oliver B. Browse this author →KAKEN DB | | Fukui, Takashi Browse this author →KAKEN DB | | Tomioka, Katsuhiro Browse this author →KAKEN DB | | Veres, Istvan A. Browse this author |
| Issue Date: | 26-Mar-2012 |
| Publisher: | American Institute of Physics |
| Journal Title: | Applied Physics Letters |
| Volume: | 100 |
| Issue: | 13 |
| Start Page: | 131902 |
| Publisher DOI: | 10.1063/1.3696380 |
| Abstract: | We investigate the vibrational modes of a triangular array of anisotropic, hexagonal GaAs nanopillars on a GaAs substrate through ultrafast changes in optical reflectivity. By comparison with simulations, we identify GHz resonances, mode shapes, and damping. In addition, by varying the pillar diameter, height, and pitch, we distinguish collective and localized modes. A proper understanding of substrate-attached nanostructure dynamics will lead to better characterization of nanosensors based on perturbations to vibrational resonances. |
| Rights: | Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 100, 131902 (2012) and may be found at https://dx.doi.org/10.1063/1.3696380 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/49118 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 松田 理
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