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Type: Artigo de periódico
Title: Raman, Hyper-raman, Hyper-rayleigh, Two-photon Luminescence And Morphology-dependent Resonance Modes In A Single Optical Tweezers System.
Author: Fontes, A
Ajito, K
Neves, A A R
Moreira, W L
de Thomaz, A A
Barbosa, L C
de Paula, A M
Cesar, C L
Abstract: We present a setup of optical tweezers combined with linear and nonlinear microspectroscopies that enhances the capabilities of capture and analysis of both techniques. We can use either a continuous-wave (cw) Ti:sapphire laser for Raman measurements or a pulsed femtosecond Ti:sapphire laser that permitted the observation of nonlinear results such as hyper-Raman, hyper-Rayleigh, and two-photon luminescence. Only the high peak intensity of the femtosecond laser allows the observation of all these nonlinear spectroscopies. The sensitivity of our system also permitted the observation of morphology-dependent resonance (MDR) modes of a single stained trapped microsphere of 6 microm. The possibility of performing spectroscopy in a living microorganism optically trapped in any desired neighborhood would mean that one can dynamically observe the chemical reactions and/or mechanical properties changing in real time.
Citation: Physical Review. E, Statistical, Nonlinear, And Soft Matter Physics. v. 72, n. 1 Pt 1, p. 012903, 2005-Jul.
Rights: aberto
Identifier DOI: 
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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