Standoff explosives trace detection and imaging by selective stimulated Raman scattering

被引：35

作者：

Bremer, Marshall T. ^{[1
]}

Dantus, Marcos ^{[1
,2
]}

机构：

[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[2] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 06期

关键词：

LASER-PULSES; SPECTROSCOPY; MICROSCOPY; SENSITIVITY; INTERFERENCE;

D O I：

10.1063/1.4817248

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We introduce a sensitive method for laser based standoff detection of chemicals based on stimulated Raman scattering. Selective excitation of a particular Raman transition is detected by measuring the diffusely reflected laser light from a distant surface. The method simultaneously measures stimulated Raman loss and gain within a single laser shot and is insensitive to the optical properties (reflectivity/absorptivity) of the substrate. We demonstrate the specificity and sensitivity by detecting and imaging nanogram analyte micro-crystals on paper, fabric, and plastic substrates at 1 to 10 m standoff distance using only 10 mW of laser power from a single femtosecond laser. (C) 2013 AIP Publishing LLC.

引用

页数：5

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