- #1

anandr

- 6

- 2

Does anybody have an idea how to treat diffraction on a grating when incident light comes from arbitrary direction ( gamma ≠ 0 and i ≠ 0 , right case on the image below )?

**k**in two components:

**k**and

_{x}**k**.

_{yz}First part (

**k**) should diffract same way as in case of normal incidence (diffracted maxima will be symmetrically placed around the

_{x}**k**across the grating stripes with diffraction angles Θ defined by d*sin(Θ)=n*λ ).

Second part (

**k**) seems to be the case presented in left part of the image (these maxima are also symmetrically placed around the

_{yz}**k**but this time incident angle

*i*is taken into account so d*(sin(Θ)+sin(i))=n*λ ). After that I just added the resulting diffracted wave vectors for each n to get the final diffracted wave vectors. Is this approach correct?