Register to reply

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

Share this thread:
phil02
#1
Oct31-06, 07:02 AM
P: 1
Hello!
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
Phys.Org News Partner Physics news on Phys.org
Step lightly: All-optical transistor triggered by single photon promises advances in quantum applications
The unifying framework of symmetry reveals properties of a broad range of physical systems
What time is it in the universe?

Register to reply

Related Discussions
Width of Slit...HeLP on setup Please Introductory Physics Homework 2
Spectrometer slit width Advanced Physics Homework 0
Reflection grating Introductory Physics Homework 4
How to determine number of dark fringes by a single slit with only lamba and width Introductory Physics Homework 1
Specular Reflection from a Reflection Diffraction Grating General Physics 1