I carried out Raman measurements of a doped semiconductor. I know what are the peaks of undoped one. I also know, that usually doped semiconductor has at least few peaks in similar positions to the undoped version.

However, today one of the samples gave signal that looks like this: enter image description here

When I zoom it a lot, I can find no reasonable peak. To sum up:

  • What does this shape of spectrum mean, and why?
  • What are the causes for lack of peaks?
  • $\begingroup$ If in the unfolded case you would see peaks, then likely this is experimental error. $\endgroup$ – Jon Custer Jun 12 '17 at 16:06
  • $\begingroup$ @JonCuster Can you tell me please what is "unfolded case"? $\endgroup$ – user46147 Jun 13 '17 at 13:05
  • $\begingroup$ Hmmmm.... Looks like auto-correct went wild. 'Undoped' must not be in the dictionary on my phone. Sigh. $\endgroup$ – Jon Custer Jun 13 '17 at 13:06

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