Raman is a non invasive study to get information about 2D materials. But its really sensitive to the substrate interaction as well as polarization. So, How to distinguish between both factors?
Polarized Raman scattering allows you to distinguish among various materials and understand the effect of substrate on the 2D materials grown on the substrate. Therefore, you should think of polarized Raman as a tool to understand the substrate (and not how to distinguished between the two). For an example on how polarized Raman spectra can provide information about the materials being analyzed you may review the following article:
Uma Ramabadran, and Bahram Roughani, “Intensity Analysis of Polarized Raman Spectra for off Axis Single Crystal Silicon”, Mat. Sci. and Eng. B, 230, pp 31–42 (April 2018). https://doi.org/10.1016/j.mseb.2017.12.040
(also, a featured review about this paper entitle; “Shining light on the off-axis single crystalline Si properties” appeared at Advances in Engineering (https://advanceseng.com/).
Are you talking about polarization of the material or of the incoming and scattered waves?
I am intereted to know if material is polarization sensitive and shows variation in Raman peak intensity with the change in polarization and subsequently the substrate is also polarization sensitive so how will we differentiate between both? For example:- Gold patterned substrate will confine light around itself with TM polarized light and lead to different kind of changes in the MoS2 Raman spectra while MoS2 layer itself is polarization sensitive itself and the ratio of the in- plane vibration peak and out of plane vibration peak with differ with the change in the polarization. So, How will one distinguish the both the effects and their interdependence on each other ?
Ok, if you talk about plasmonics and Raman spectroscopy, you must have knowledge about symmetry analysis and the symmetry of the molecule/unit cell you are investigating, i.e. MoS2 in its bulk form. Additionally you have to take into account that for metals the E-field components tangential are (close to) zero. See e.g. Article Surface selection rules for surface-enhanced Raman spectrosc...
Thanks a lot ... This is a big help for me. I will look into the paper you have sent more carefully. :)
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