Resonators

University of Wisconsin-Madison engineers claim to have constructed a nanoscale device that can emit light as powerfully as an object 10,000 times its size. It could find use in applications such as high-efficiency solar cells.

A new micro-ring resonator has been developed that is claimed to produce copious numbers of entangled photons using miniscule amounts of energy and can fit onto an ordinary silicon chip. This advance promises to bring quantum computing, communication, and cryptography closer to a practical reality.