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Vibrational modes of GaAs hexagonal nanopillar arrays studied with ultrashort optical pulses

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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
Type: article
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)

Submitter: 松田 理

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