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 E-Mail IMAGE: Schematic of the optical microcavity with 2D semiconductor. The nonlinear optical response arises from the larger Bohr radii Rydberg excitons allowing to push the limit to few photon nonlinear limit. view more  Credit: Image credit: Rezlind Bushati The ability to turn on and off a physical process with just one photon is a fundamental building block for quantum photonic technologies. Realizing this in a chip-scale architecture is important for scalability, which amplifies a breakthrough by City College of New York researchers led by physicist Vinod Menon. They ve demonstrated for the first time the use of Rydberg states in solid state materials (previously shown in cold atom gases) to enhance nonlinear optical interactions to unprecedented levels in solid state systems. This feat is a first step towards realizing chip-scale scalable single photon switches.

New yorkUnited statesJie guMichael gerholdVinod menonNature communicationsCity college division of scienceCity college of new yorkArmy research laboratoryArmy research officeUs army combat capabilities developmentCity collegeMontreal polytechnicProfessor menonCombat capabilities development commandArmy research