Quantum optics is a branch of atomic, molecular, and optical physics dealing with how individual quanta of light, known as photons, interact with atoms and molecules. It includes the study of the particle-like properties of photons. Photons have been used to test many of the counter-intuitive predictions of quantum mechanics, such as entanglement and teleportation, and are a useful resource for quantum information processing.
http://nobelprize.org/physics/laureates/2005/index.html
Glauber, Hall and Haensch.
Glauber for his quantum optics,
the two others for their contribution to spectroscopy.