Stimulated Raman scattering of light beams under saturation conditions

Betin, A. A.; Pasmanik, G. A.; Piskunova, L. V.

doi:10.1070/qe1975v005n11abeh012117

Cited by 7 publications

(3 citation statements)

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“…Moreover, the saturated pump–probe technique gives access to higher spatial information beyond the diffraction limit and can be applied to any samples showing a saturable absorption transition. In principle, this approach can also be extended to coherent Raman imaging of cellular components, exploiting the saturation properties of the stimulated Raman scattering process …”

Section: Discussionmentioning

confidence: 99%

“…In principle, this approach can also be extended to coherent Raman imaging of cellular components, exploiting the saturation properties of the stimulated Raman scattering process. 41 With the implementation of NIR illumination, saturated pump−probe microscopy allows imaging in scattering media and tissues, and it can be integrated into a multimodal nonlinear microscopy platform, together with 2PEF, SHG, and SRS label-free techniques in order to broaden its use in biology and material sciences.…”

Section: Discussionmentioning

confidence: 99%

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Label-Free Optical Nanoscopy of Single-Layer Graphene

et al. 2019

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The application of ultrafast pulsed laser sources and spectroscopic techniques enables label-free, deep-tissue optical microscopy. However, circumvention of the diffraction limit in this field is still an open challenge. Among such approaches, pump–probe microscopy is of increasing interest thanks to its highly specific nonfluorescent-based contrast mechanisms for the imaging of material and life science samples. In this paper, a custom femtosecond-pulsed near-infrared pump–probe microscope, which exploits transient absorption and stimulated Raman scattering interactions, is presented. The conventional pump–probe configuration is combined with a spatially shaped saturation pump beam, which allows for the reduction of the effective focal volume exploiting transient absorption saturation. By optimizing the acquisition parameters, such as power and temporal overlap of the saturation beam, we can image single-layer graphene deposited on a glass surface at the nanoscale and with increased layer sensitivity. These results suggest that saturation pump–probe nanoscopy is a promising tool for label-free high-resolution imaging.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Label-Free Optical Nanoscopy of Single-Layer Graphene

et al. 2019

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“…(see for instance [2][3][4]). Attention has mostly been paid to the reproduction and phase conjugation of light beams, formed at Raman scattering, and only relatively small amount of effort has been devoted to the consideration of the spatial dynamics of the amplitude-phase characteristics of Raman waves [5][6][7][8][9]. The characteristics of Stokes components at Raman scattering have been mostly analyzed both theoretically and experimentally in gases at relatively small distances of interaction [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of spatial modes of the Raman scattering stokes component radiation excited in an extensive multimode waveguide

Kitsak

2007

SPIE Proceedings

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We conduct a theoretical analysis of the Stokes component mode structure of the Raman scattering. The Raman scattering is excited in a multimode waveguide with pump radiation having statistics corresponding to the model of the narrow-band Gaussian noise. We obtain an analytical relation connecting the number of spatially coherent modes of the Stokes component, characteristics of the waveguide and conditions of the Raman scattering excitation. It follows from the obtained relation that the Raman scattering spatial coherency degree at the waveguide's exit is determined by the number of the spatial modes of pump radiation and the amplification of the Stokes radiation throughout the waveguide's length. There exists a threshold in the amplification corresponding to the unlimited increase of the number of the spatially coherent modes of the Raman scattering and therefore to a zero of spatial coherency. Conducted estimations show that at the Raman scattering threshold value of the radiation intensity the number of the spatially coherent modes of the Raman scattering Stokes component should be comparable to that of the thermal source. Experimentally, measured dispersion of the spatial intensity fluctuations of the Stokes component isolated with an interference filter (spectral bandwidth ~ 1nm, λ = 620nm) is three time smaller than that of the luminescent lamp radiation

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Optical nonlinearities with ultrashort pulses

Laubereau¹

1988

Topics in Applied Physics

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Stimulated Raman scattering of light beams under saturation conditions

Cited by 7 publications

References 0 publications

Label-Free Optical Nanoscopy of Single-Layer Graphene

Label-Free Optical Nanoscopy of Single-Layer Graphene

Analysis of spatial modes of the Raman scattering stokes component radiation excited in an extensive multimode waveguide

Optical nonlinearities with ultrashort pulses

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