Physics Colloquium - Two-Atom Masers

Event Date: 

Tuesday, December 9, 2014 - 4:00pm

Event Location: 

  • Broida 1640

Event Contact: 

Speaker:

Jason Petta, Princeton University

Abstract:

The coherent generation of light, from masers to lasers, relies upon the specific structure of the individual emitters that lead to gain. Devices operating as lasers in the few-emitter limit provide opportunities for understanding quantum coherent phenomena, from THz sources to quantum communication. I will describe a newly discovered maser, which is driven by single electron tunneling events. Semiconductor double quantum dots (DQDs) serve as a gain medium and are placed inside of a high quality factor microwave cavity. Maser action is verified by comparing the statistics of the emitted microwave field above and below the maser threshold.