Switching of localized surface plasmon resonance of gold nanoparticles on a GeSbTe film mediated by nanoscale phase change and modification of surface morphology

T. Hira, T. Homma, T. Uchiyama, K. Kuwamura, Toshiharu Saiki

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

As a platform for active nanophotonics, localized surface plasmon resonance (LSPR) switching via interaction with a chalcogenide phase change material (GeSbTe) was investigated. We performed single-particle spectroscopy of gold nanoparticles placed on a GeSbTe thin film. By irradiation with a femtosecond pulsed laser for amorphization and a continuous wave laser for crystallization, significant switching behavior of the LSPR band due to the interaction of GeSbTe was observed. The switching mechanism was explained in terms of both a change in the refractive index and a modification of surface morphology accompanying volume expansion and reduction of GeSbTe.

Original languageEnglish
Article number241101
JournalApplied Physics Letters
Volume103
Issue number24
DOIs
Publication statusPublished - 2013 Dec 9

Fingerprint

surface plasmon resonance
gold
nanoparticles
phase change materials
continuous wave lasers
pulsed lasers
platforms
interactions
crystallization
refractivity
irradiation
expansion
thin films
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Switching of localized surface plasmon resonance of gold nanoparticles on a GeSbTe film mediated by nanoscale phase change and modification of surface morphology. / Hira, T.; Homma, T.; Uchiyama, T.; Kuwamura, K.; Saiki, Toshiharu.

In: Applied Physics Letters, Vol. 103, No. 24, 241101, 09.12.2013.

Research output: Contribution to journalArticle

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