Evidence for a strong surface-plasmon resonance on ErAs nanoparticles in GaAs

被引：45

作者：

Brown, ER ^{[1
]}

Bacher, A

Driscoll, D

Hanson, M

Kadow, C

Gossard, AC

机构：

[1] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[2] Univ Calif Santa Barbara, Santa Barbara, CA 91109 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.90.077403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Room-temperature attenuation measurements are made between lambda=0.8 and 10.0 mum on three GaAs epitaxial samples containing layers of ErAs nanoparticles. An asymmetric attenuation peak is observed around 2.5 mum that increases in strength with ErAs density, and is modeled well by a Maxwell-Garnett formulation and semiclassical transport theory. The nanoparticles are assigned a distribution function of oblate spheroids having a minimum volume corresponding to a 1.0-nm sphere. This is consistent with the self-organizing tendency of ErAs in GaAs, and explains the sharp attenuation peak as a spherical-particle surface-plasmon (i.e., Frohlich) resonance.

引用

页数：4

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