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Text File  |  1992-12-24  |  820 b   |  22 lines
  1. Newsgroups: sci.materials
  2. Path: sparky!uunet!munnari.oz.au!yoyo.aarnet.edu.au!news.adelaide.edu.au!augean.eleceng.adelaide.edu.AU!dabbott
  3. From: dabbott@augean.eleceng.adelaide.edu.AU (Derek Abbott)
  4. Subject: Absorption Length in materials
  5. Message-ID: <1992Dec18.060454.8821@augean.eleceng.adelaide.edu.AU>
  6. Organization: Electrical and Electronic Eng., University of Adelaide
  7. Date: Fri, 18 Dec 1992 06:04:54 GMT
  8. Lines: 12
  9.  
  10.  
  11. Does anyone know why the curve of Absorption Length of light in silicon versus
  12. the light wavelength has two dips in it between 200 and 400nm wavelenghths?
  13.  
  14. The curve for gallium arsenide also has two dips, somewhere between 200 & 500nm.
  15. Do other materials exhibit this behaviour?
  16.  
  17. My guess is that the dips have something to do with surface states
  18. -- but why *two* distinct dips?
  19.  
  20.  
  21. Any references?
  22.