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Proceedings Paper

Nano-surface patterning by femtosecond laser for plasmonic surface optical applications
Author(s): Go Obara; Tomoya Miyanishi; Yuto Tanaka; Mitsuhiro Terakawa; Minoru Obara
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Paper Abstract

For plasmonic surface optical applications, localized optical field distribution properties in the vicinity of gold particles on a silicon substrate by backward and forward irradiation are presented. It is technically difficult to fabricate nanostructure on the surface by conventional forward laser incidence to the substrate because gold nanoparticles easily aggregate to form double-layered particle arrays. We calculated enhanced optical field properties in order to pattern the substrate surface only with a template of the bottom-layered particle arrays in case that the backward irradiation of femtosecond laser is used in the system of aggregated double-layered gold nanoparticle arrays. With the backward irradiation, the optical field intensity in the substrate for the double-layered hexagonal arrays is found to be only 30% lower than the mono-layered system. Moreover, near-field cannot be generated with the forward irradiation. As a result, only the backward irradiation scheme is found to be effective for uniform surface nanopatterning at enhanced plasmonic near-field zones.

Paper Details

Date Published: 16 November 2010
PDF: 10 pages
Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77511Y (16 November 2010); doi: 10.1117/12.881486
Show Author Affiliations
Go Obara, Keio Univ. (Japan)
Tomoya Miyanishi, Keio Univ. (Japan)
Yuto Tanaka, Keio Univ. (Japan)
Mitsuhiro Terakawa, Keio Univ. (Japan)
Minoru Obara, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 7751:
XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Tanja Dreischuh; Petar A. Atanasov; Nikola V. Sabotinov, Editor(s)

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