anti-Stokes lines
physics
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contrast with Stokes lines
- In Stokes lines
Anti-Stokes lines are found in fluorescence and in Raman spectra when the atoms or molecules of the material are already in an excited state (as when at high temperature). In this case the emitted photon takes the molecule back to the ground state, and thus…
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production in molecular spectroscopy
- In spectroscopy: Coherent anti-Stokes Raman spectroscopy (CARS)
… = 2ν1 − ν2 (anti-Stokes) and νS = 2ν2 − ν1 (Stokes) are produced by wave mixing due to the nonlinear polarization of the medium. While either output signal may be detected, the anti-Stokes frequency is well above ν1 and has the advantage of being readily separated by optical…
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