title: Semiconductor double quantum dot micromaser.
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 terahertz sources to quantum communication. Here we demonstrate a maser that is driven by single-electron tunneling events. Semiconductor double quantum dots (DQDs) serve as a gain medium and are placed inside a high-quality factor microwave cavity. We verify maser action by comparing the statistics of the emitted microwave field above and below the maser threshold.
authors.affiliation: Department of Physics, Princeton University, Princeton, NJ 08544, USA.
authors.forename: Y-Y
authors.initials: YY
authors.lastname: Liu
authors.affiliation: Department of Physics, Princeton University, Princeton, NJ 08544, USA.
authors.forename: J
authors.initials: J
authors.lastname: Stehlik
authors.affiliation: Department of Physics, Princeton University, Princeton, NJ 08544, USA.
authors.forename: C
authors.initials: C
authors.lastname: Eichler
authors.affiliation: Joint Quantum Institute, University of Maryland-National Institute of Standards and Technology, College Park, MD 20742, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Gullans
authors.affiliation: Joint Quantum Institute, University of Maryland-National Institute of Standards and Technology, College Park, MD 20742, USA. Joint Center for Quantum Information and Computer Science, University of Maryland and NIST, College Park, MD 20742, USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Taylor
authors.affiliation: Department of Physics, Princeton University, Princeton, NJ 08544, USA. Department of Physics, University of California, Santa Barbara, CA 93106, USA. petta@princeton.edu.
authors.forename: J R
authors.initials: JR
authors.lastname: Petta