Standoff detection of trace amounts of solids by nonlinear Raman spectroscopy using shaped femtosecond pulses

O. Katz, A. Natan, Y. Silberberg, S. Rosenwaks

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

We demonstrate a single-beam, standoff (>10 m) detection and identification of various materials including minute amounts of explosives under ambient light conditions. This is obtained by multiplex coherent anti-Stokes Raman scattering spectroscopy (CARS) using a single femtosecond phase-shaped laser pulse. We exploit the strong nonresonant background for amplification of the backscattered resonant CARS signals by employing a homodyne detection scheme. The simple and highly sensitive spectroscopic technique has a potential for hazardous materials standoff detection applications.

Original languageEnglish
Article number171116
JournalApplied Physics Letters
Volume92
Issue number17
DOIs
StatePublished - 9 May 2008

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