Bottle Microresonator

http://www.sciencedaily.com/releases/2009/07/090729074527.htm

*It's a kind of "battery" for storing photons, and a nifty ultracheap component

that would promise all kinds of odd applications. But, being a science fiction writer,

I immediately thought "slow glass." Bob Shaw's slow glass. This guy got an

amazing amount of fictional mileage out of a very simple conceit.

http://www.technovelgy.com/ct/content.asp?Bnum=692

*You just fill a windowpane with bottle microresonators, set the stretch-capa