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

被引：28

作者：

Hira, T. ^{[1
]}

Homma, T. ^{[1
]}

Uchiyama, T. ^{[1
]}

Kuwamura, K. ^{[1
]}

Saiki, T. ^{[1
]}

机构：

[1] Keio Univ, Grad Sch Sci & Technol, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 24期

关键词：

CHANGE METAMATERIAL; PERFECT ABSORBER; OPTICAL-DEVICES; FANO RESONANCES; MANIPULATION;

D O I：

10.1063/1.4841975

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2013 AIP Publishing LLC.

引用

页数：4

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