WiFi is embedded in our lives today. The term originated about four decades ago (as a marketing ploy, designed to rhyme with the term “Hi-Fi”) and has revolutionized personal communications, internet ...

An LED and a semiconductor laser (or laser LED) work in essentially the same way, that is, light is emitted as electrons and holes combine, with emission wavelength dependent upon the materials used.

Incandescent bulbs have given way to CFL and LEDs, but these lighting technologies may be destined for extinction as well. A team of scientists at Arizona State University have developed a laser that ...