NEAR-FIELD AND PARTICLE SIZE EFFECTS IN COHERENT RAMAN SCATTERING
نویسندگان
چکیده
منابع مشابه
Spatial coherence in near-field Raman scattering.
Inelastic light scattering in crystals has historically been treated as a spatially incoherent process, giving rise to incoherent optical radiation. Here we demonstrate that Raman scattering can be spatially coherent, in which case it depends on the dimensionality and symmetry of the scatterer. Using near-field spectroscopy, we measure a correlation length of ∼30 nm for the optical phonons in ...
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We employ the finite-difference time-domain (FDTD) technique as a numerical approach to studying the effects of polarization, scatterers' sizes and orientations on near-field coherent anti-Stokes Raman scattering (CARS) microscopy imaging. The results show that to acquire better image contrast and larger near-field CARS signals, the scatterers with diameters of less than three-eighths of the pu...
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Luiz Gustavo Cançado, Ryan Beams, Ado Jorio, and Lukas Novotny Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 30123-970, Brazil Institute of Optics, University of Rochester, Rochester, New York 14627, USA Photonics Laboratory, ETH Zürich, 8093 Zürich, Switzerland (Received 28 March 2014; revised manuscript received 2 June 2014; published 26 September ...
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Coherent anti-Stokes Raman scattering (CARS) microscopy with high sensitivity, and high three dimensional resolution, has been developed for vibrational imaging of chemical species [1]. Due to the coherent nature of the CARS emission, it has been reported that the Epi-CARS (E-CARS) and Forward-CARS (F-CARS) signals detection depends on the size and shape of the sample [2,3]. In this paper, we i...
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Coherent anti-Stokes Raman scattering (CARS) microscopy with high sensitivity and high three- dimensional resolution has been developed for the vibrational imaging of chemical species. Due to the coherent nature of the CARS emission, it has been reported that the detection of epi-CARS and forward-CARS (F-CARS) signals depends on the size and shape of the sample. We investigate theoretically and...
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ژورنال
عنوان ژورنال: Progress In Electromagnetics Research
سال: 2011
ISSN: 1559-8985
DOI: 10.2528/pier11051206