Finding resources on the thermo-optical effect

[Lee]

Basically, I have a project involving thermally tunable photonic crystals and part of the essay in the run up to the experiment work I want to write a bit on the thermo optical effect, but I have searched in vain for a resource for this. Can anyone suggest a textbook or something online?

Thanks.

 

[Gokul43201]

Some of these (or references within) might be helpful:

http://www.aegislightwave.com/technology_publications.html

 

[Lee]

Thanks for the references, however I need something more basic, more textbook.