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Homework Help: Ellipsometry problem help

  1. May 15, 2010 #1
    Here is my situation:
    According to ellipsometry theory the complex reflectance ratio can be expressed as
    [PLAIN]http://img255.imageshack.us/img255/2657/68578079.png [Broken]
    where tan([tex]\Psi[/tex]) is the amplitude ratio upon reflection and [tex]\Delta[/tex] is a phase shift.
    On the other hand, as far as I now, phase shift upon reflection is [tex]\pi[/tex] or 0, depending on materials.
    the question: is the [tex]\Psi[/tex] only variable that is being changed in wide range while [tex]\Delta[/tex] is either [tex]\pi[/tex] or 0 in all cases.

    Sorry for not following subforum format, I just could not fit my question in it.
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. May 15, 2010 #2
    Re: Ellipsometry

    Phase shifts of pi and 0 occur at normal incidence for s or p polarized light. Ellipsometry uses oblique angles of reflections and compares the phase shifts after reflection of the two states of polarized light. See the below link for a brief tutorial of ellipsometry.

  4. May 15, 2010 #3
    Re: Ellipsometry

    So it turnes out that s and p polarized lights are phase shifted differently upon reflection.
    but why? :uhh:
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