Measurement of the refractive index of a special sample

[Silicon]

I want to measure the refractive index of a thin cantilever ; however the sample is too small (about tens of microns). on the other hand, the cantilever maybe not flat at all and it is curly. how can I do it?

 

[dlgoff]

I don't know if http://fourier.mech.virginia.edu/~microhx/ncframerightbottom.html" will help.

 

[Silicon]

My sample is too small and curly so that I don't think the normal method to measure the refractive index is useful.