1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Interference using a reflection grating: how to determine the slit width?

  1. Oct 31, 2006 #1
    I'm working on a surface analysis of a silicon-microstrip-detector.
    That is basically a silicon wafer with p- and n- doped strips on it. They are periodically produced on the crystal. Therefore I can use it as a diffraction grating for visible light to do my surface analysis.
    My light source is a common laser pointer.

    What I measure is:
    - the Intensity of the Light (I) at many different angles (alpha)

    What I have to know and want to calculate is:
    1. the slit distance (-> the grating constant) [no problem here]
    2. the slit width [big problems here]

    Now my question is:
    concerning 2.: Can I calculate the slit width using the interference pattern?
    I'm not sure if I could do this using some kind of Fraunhofer diffraction?
    I wasn't able to find any formula relating the slit width of a grating to the interference pattern it creates.

    Maybe you can help me with that. Many Thanks, phil
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted