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Stimulated Raman spectroscopy information


Stimulated Raman spectroscopy, also referred to as stimulated Raman scattering (SRS), is a form of spectroscopy employed in physics, chemistry, biology, and other fields. The basic mechanism resembles that of spontaneous Raman spectroscopy: a pump photon, of the angular frequency , which is scattered by a molecule has some small probability of inducing some vibrational (or rotational) transition, as opposed to inducing a simple Rayleigh transition. This makes the molecule emit a photon at a shifted frequency. However, SRS, as opposed to spontaneous Raman spectroscopy, is a third-order non-linear phenomenon involving a second photon—the Stokes photon of angular frequency —which stimulates a specific transition. When the difference in frequency between both photons () resembles that of a specific vibrational (or rotational) transition () the occurrence of this transition is resonantly enhanced. In SRS, the signal is equivalent to changes in the intensity of the pump and Stokes beams. The signals are typically rather low, of the order of a part in 10^5, thus calling for modulation-transfer techniques: one beam is modulated in amplitude, and the signal is detected on the other beam via a lock-in amplifier. Employing a pump laser beam of a constant frequency and a Stokes laser beam of a scanned frequency (or vice versa) allows for unraveling the molecule's spectral fingerprint. This spectral fingerprint differs from those obtained by other spectroscopy methods, such as Rayleigh scattering, as the Raman transitions confer different exclusion rules than those that apply to Rayleigh transitions.

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Stimulated Raman spectroscopy

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Stimulated Raman spectroscopy, also referred to as stimulated Raman scattering (SRS), is a form of spectroscopy employed in physics, chemistry, biology...

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for stimulated Raman spectroscopy (SRS) and hyperspectral microscopy. In SRS, the energy difference between two lasers is used to excite a Raman scattering...

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; Owyoung, A. (1983). "High-resolution stimulated Raman spectroscopy of O2". Journal of Molecular Spectroscopy. 100 (1): 119–133. Bibcode:1983JMoSp.100...

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predict and describe experimental results in many areas including Raman spectroscopy, non-linear optics generally, various types of photochemistry, and...

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Wang Hongfei

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nonlinear spectroscopic techniques, such as the Femtosecond Stimulated Raman Spectroscopy (FSRS). Wang was selected to the Hundred Talent Program, Chinese...

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