Polarized Raman Spectroscopy

  • Thread starter Smerdiis
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  • #1
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Dear friends
I have a question regarding to polarized Raman spectroscopy. When we are talking about parallel and perpendicular electric field of the laser, is the magic angle 90° or 54.7°?
I'd be grateful if you could answer me as soon as possible.
Best wishes
Kasra
 

Answers and Replies

  • #2
DrDu
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Maybe you can explain this in more detail. I know the term "magic angle" from nuclear resonance, but not from Raman spectroscopy. However, it may be easy to figure out what is meant in that context.
 
  • #3
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Dear DrDu

The magic-angle in Raman spectroscopy or Linear Dicroism is the difference in the electric field of two different incident light polarizations.

Thanks
 
  • #4
DrDu
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A difference of electric fields hardly has the unit of an angle?
 
  • #5
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oh actually it has
when you linearly polarise the light, you are rotating and adjusting its electric field to a specific angle
This is the base of techniques such as linear dichroism, circular dicroism, polarised Raman spectroscopy and polarised IR spectroscopy.
 
  • #6
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I've heard the term "magic angle" for NMR, and is around 54°. For Raman a perpendicular angle would be 90°.
 
  • #7
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I guess so
Thank you very much
 
  • #8
Claude Bile
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Dear DrDu

The magic-angle in Raman spectroscopy or Linear Dicroism is the difference in the electric field of two different incident light polarizations.

Thanks
I think Smerdiis meant to say phase difference which would indeed have angular units.

Claude.
 

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