All-optical switching of localized surface plasmon resonance in single gold nanosandwich using GeSbTe film as an active medium

被引：34

作者：

Hira, T. ^{[1
]}

Homma, T. ^{[1
]}

Uchiyama, T. ^{[1
]}

Kuwamura, K. ^{[1
]}

Kihara, Y. ^{[1
]}

Saiki, T. ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 03期

基金：

日本学术振兴会;

关键词：

PHASE-TRANSITION;

D O I：

10.1063/1.4906037

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Localized surface plasmon resonance (LSPR) switching was investigated in a Au/GeSbTe/Au nanosandwich as a key active element for plasmonic integrated circuits and devices. Near-infrared single-particle spectroscopy was conducted to examine the interaction of a Au nanorod (AuNR) and Au film, between which a GeSbTe layer was incorporated as an active phase-change media. Numerical calculation revealed that hybridized modes of the AuNR and Au film exhibit a significant change of scattering intensity with the phase change. In particular, the antisymmetric (magnetic resonance) mode can be modulated effectively by the extinction coefficient of GST, as well as its refractive index. Experimental demonstration of the switching operation was performed by alternate irradiation with a picosecond pulsed laser for amorphization and a continuous wave laser for crystallization. Repeatable modulation was obtained by monitoring the scattering light around the LSPR peak at lambda = 1070 nm. (C) 2015 AIP Publishing LLC.

引用

页数：5

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