Those who know me know I'm not usually one for hard science; I can still remember all the experiments I irredeemably screwed up in highschool physics class. But, a dork at heart, I was still fascinated by this article on directed energy weapons and their applications.
The article is a little out of date, but it is nonetheless an excellent primer on the subject of weaponized lasers and microwaves--a must for any writers of science fiction or space fantasy out there. My personal favourite "realistical" deathray is the electrolaser!
Andrew Gudgel, one of the authors, has a great new story called "Tags" up at Flash Fiction Online. Check it out! And then gives thanks to the Internet for the blessing of linking.