News Physics Low-energy laser makes leap toward practicality Semiconductor-based device runs on electricity Share this:FacebookTwitterPocketRedditPrintEmail By Andrew Grant May 15, 2013 at 3:38 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe