Island size effects in nanoparticle-enhanced photodetectors

被引：430

作者：

Stuart, HR ^{[1
]}

Hall, DG ^{[1
]}

机构：

[1] Univ Rochester, Inst Opt, Rochester, NY 14627 USA

来源：

APPLIED PHYSICS LETTERS | 1998年 / 73卷 / 26期

关键词：

D O I：

10.1063/1.122903

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the effect of metal-island size variation in nanoparticle-enhanced photodetectors. Nanoparticle size was controlled by varying the deposition and annealing conditions used to produce the metal-island films. Increasing the size of silver-island particles fabricated onto 165 nm thick silicon-on-insulator (SOI) photodetectors resulted in a dramatic increase in the observed photocurrent. A nearly factor-of-20 photocurrent enhancement was observed for light of wavelength 800 nm, a significant improvement over previously reported results. The improvement is linked to two physical effects: the increased scattering efficiency of the larger nanoparticles and a qualitative change in the resonance characteristics of the metal-island film due to radiative coupling to the SOI waveguide modes. (C) 1998 American Institute of Physics. [S0003-6951(98)03952-7].

引用

页码：3815 / 3817

页数：3

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