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Title: Surface plasmon resonance tuning of Ag nanoisland films using a CO₂ laser
Authors: Faniayeu, Ihar
Ishimatsu, Yuki
Nakajima, Takashi
Author's alias: 中嶋, 隆
Issue Date: Jul-2019
Publisher: Institute of Physics Publishing
Journal title: Journal of Physics D: Applied Physics
Volume: 52
Issue: 29
Thesis number: 295103
Abstract: We demonstrate that the surface plasmon resonance of Ag nanoislands (NIs) can be conveniently tuned through the laser power and irradiation time. For instance, the resonance wavelength of Ag NIs can be tuned from 548 nm to 452 nm under the 3 W laser power simply by varying the irradiation time from 5 s to 2 min. Interestingly, the position-dependent optical absorption spectra and SEM analysis reveals that the Ag NIs gradually disappear from the irradiation center even at 3 W if the irradiation time is longer. This means that the macroscopic diffusion of Ag atoms on the substrate takes place during the CO₂ laser irradiation, and its driving force would be the temperature gradient along the radial direction with respect to the irradiation center due to the spatial beam profile of the laser.
Rights: This is the Accepted Manuscript version of an article accepted for publication in Journal of Physics D: Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1361-6463/ab1b7b.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/259208
DOI(Published Version): 10.1088/1361-6463/ab1b7b
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