For years, researchers have been routinely slowing light to just a few meters per second, and have recently even stopped it dead in its tracks so that it can be stored for future use. Their motivation is to realize the full potential of slow light in optical storage and quantum memory for single photons. In all of these applications, slow light can be delayed by a controllable amount. Slow light is now also being exploited in applications such as quantum computing, quantum cryptography and tests of fundamental physics. Far from stopping, advances in slight light are beginning to take off.
