The wavelength distribution of monochromatic laser source implies the quality of the source. As an example, for the power source, the narrow wavelength distribution is more sophisticated than the broaden wavelength distribution.
I need to know which one is more appropriate (either narrow distribution or broaden distribution) for the SERS sensing application.
In Raman Scattering, the shift in the wavelength characterizes the molecule.
Thank you so much Mr Ankit Arora. But I am thinking about the band width. Because the enhancement on the metal surface is relatively high at certain wavelength. Therefore Robust SERS signal can obtain that particular wavelength.
I need to know what will happen when the source bandwidth is broaden.
As far as I know, if you are using some metal nanoparticles for SERS, it's the LSPR wavelength that matters. This wavelength decides the enhanced field at that wavelength.
The Raman enhancement factor is the product of gain at excitation and scattering frequency. Please have a look to this: http://aip.scitation.org/doi/10.1063/1.1571979
The maximum enhancement should be observed when fields at both the wavelengths, excitation (kexc) and Raman shifted wavelength (kR), are enhanced.
J. Phys. Chem. B 110, 17444–17451 (2006); J. Phys. Chem. C 117, 2554–2558 (2013)
Thank you so much.
I am working on simulation of PCF structures. I feel that the bandwidth of monochromatic light source will effect to the measurement of Raman shift.
If someone experience that kind of thing, please let me know. I am finding such a research issue.
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