Detection of single gold nanoparticles using spatial modulation spectroscopy implemented with a galvo-scanning mirror system

被引：19

作者：

Devadas, Mary Sajini ^{[1
]}

Li, Zhongming ^{[1
]}

Major, Todd A. ^{[1
]}

Lo, Shun Shang ^{[1
]}

Havard, Nicolas ^{[1
]}

Yu, Kuai ^{[1
]}

Johns, Paul ^{[1
]}

Hartland, Gregory V. ^{[1
]}

机构：

[1] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA

来源：

APPLIED OPTICS | 2013年 / 52卷 / 32期

基金：

美国国家科学基金会;

关键词：

PHOTOTHERMAL CORRELATION SPECTROSCOPY; OPTICAL-ABSORPTION; ROOM-TEMPERATURE; MICROSCOPY DETECTION; PARTICLE MICROSCOPY; PLASMON RESONANCE; SENSITIVITY; LUMINESCENCE; TRACKING; NANORODS;

D O I：

10.1364/AO.52.007806

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The optical extinction of single nanoparticles can be sensitively detected by spatial modulation spectroscopy (SMS), where the particle is moved in and out of a tightly focused laser beam with a piezo-device. Here we show that high sensitivity can be obtained by modulating the beam with a galvo-mirror system, rather than by moving the sample. This work demonstrates an inexpensive method for making a SMS microscope, and shows how an existing laser scanning microscope can be adapted for SMS measurements. The galvo-mirror technique also allows SMS measurements to be performed in a liquid, which is difficult to do with piezo-modulation. (C) 2013 Optical Society of America

引用

页码：7806 / 7811

页数：6

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