Re: measuring phase,polarization and amplitude of diffraction orders

I want to illuminate a 10 micron x 10 micron, periodic transmission
grating with coherent, polarized light and measure the phase,
polarization and amplitude of the diffraction orders created.

There was a guy in Switzerland some years ago -- worked in Bern? -- back
in the days when all kinds of scanning acoustic microscopes, tunneling
microscopes, force microscopes, etc, were emerging, who had a scanning
optical microscope with a tiny pinhole on the end of a (tapered?) fiber,
which he could scan across a sample in the same fashion. He could probe
the evanescent fields above a TIR spot with it, and also the fields
above diffraction gratings -- gave a very interesting talk about it.

Sorry, no chance I'll remember who this was, but maybe you can track him
down. (Maybe it was Neuchatel instead of Bern.)
.