Resonant Rayleigh scattering spectroscopy

Dark-field resonant Rayleigh scattering spectroscopy and imaging One... 

Dark-field spectroscopy (DFS) Dark-field spectroscopy, also known as resonant Rayleigh scattering spectroscopy (RRSS), is a technique that correlates the LSPR of single nanoparticles to enhancements in fluorescence and Raman scattering. 

Fig. 1 Representation of the processes that occur (from left to right) in non-resonant Rayleigh scattering, Stokes and anti-Stokes Raman and resonance Raman spectroscopy.

Fig. 12.6. Raman spectroscopy—radiation emission, (a) The normal Raman effect. R represents Rayleigh scattering (b) The resonance Raman effect.

Important for the detectability of a resonant microwave transition is the signal-to-noise ratio S/N. It is well known, that Rayleigh scattering is the limiting noise factor in single-molecule spectroscopy [16]. Both depend on the laser intensity. The S/N ratio can be approximated by... 

Figure 14.24 Schematic illustration of the concept of Raman excitation, (a) Conventional Raman spectroscopy excitation to a virtual state leads to reemission of a photon of the same frequency as the excitation source, Rayleigh scattering, or inelastic scattering where the reemitted photon has greater (Anti-Stokes) or less energy (Stokes) than the incident photon, (h) Resonance Raman conditions the frequency of the incident photon matches or is close to the energy of an optical absorbance, resulting in scatter which originates from an excited electronic state.

See also ATR and Reflectance IR Spectroscopy, Applications IR Spectral Group Frequencies of Organic Compounds Nuclear Quadrupole Resonance, Instrumentation Photoacoustic Spectroscopy, Applications Rayleigh Scattering and Raman Spectroscopy, Theory. 

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