Ultrafast dynamics of the interlayer shearing mode in Au graphite nanostructures

Author

Avila-Ortega, M.F. ; Katayama, Ikufumi ; Minami, Yasuo ; Takeda, Jun ; Kitajima, Masahiro

Author_Institution

Dept. of Phys., Yokohama Nat. Univ., Yokohama, Japan

fYear

2013

fDate

June 30 2013-July 4 2013

Firstpage

1

Lastpage

2

Abstract

The main objective of this research is to study the effect on gold nanostructures (~10 nm diameter size) deposited in highly ordered pyrolytic graphite (HOPG), by measuring coherent phonon spectroscopy with ultrashort (7.5 fs) laser pulses. The gold average thickness d was varied from 2 to 40 Å. We focused on the influence of gold nanoparticles in the interlayer shearing mode E_2g, whose energy is about 1.3 THz. We found a destructive interference of the phonon oscillations to decrease the intensity spectral peak which was critical for d=1.8 nm.

Keywords

gold; graphite; nanoparticles; nanophotonics; phonon spectra; time resolved spectra; Au; C; HOPG; coherent phonon spectroscopy; destructive interference; gold average thickness; gold nanostructures; highly ordered pyrolytic graphite; intensity spectral peak; interlayer shearing mode; phonon oscillations; size 2 A to 40 A; ultrafast dynamics; Gold; Graphite; Nanoparticles; Oscillators; Phonons; Reflectivity; Shearing;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2013 Conference on

Conference_Location

Kyoto

Type

conf

DOI

10.1109/CLEOPR.2013.6600515

Filename

6600515