Materials question

I was wondering if any normally transparent materials have displayed light polarity manipulable changes under electric-potential/magnetic-induction fields.

I'm looking to build the most bad-ass skylight ever and want some place in the doc/spec/logically-consistent-research-body-of-the-human-race to expand my understanding in the area.

Don't /sci/ much, background is lacking in mat. sci, but decent in electronic control/logic systems (arduino, circuits 1+2 etc.). Materials stuff only, no control.

tl;dr: want apply potential make transparent opaque w/o color spectrum loss. know sirkut, want stuff

http://en.wikipedia.org/wiki/Smart_glass

I'm pretty sure Faraday did an experiment like this, which sadly doesn't fit any of the "skylight" criteria, but he did show that it's possible to change the transmitted angle of polarized light.

Maybe with like, that kinda setup over some polarizing lenses you could change how much voltage you're putting in so that at daytime it's darker, and night time it's completely clear.

Of course, I would expect this to be ridiculously expensive and also power consuming.

you will be my next bitch, bitch.