Journal
SCIENCE
Volume 347, Issue 6219, Pages 285-287Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaa2501
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Funding
- Packard Foundation
- National Science Foundation [DMR-1409556, DMR-1420541]
- Defense Advanced Research Projects Agency QuEST [HR0011-09-1-0007]
- Army Research Office [W911NF-08-1-0189]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1409556] Funding Source: National Science Foundation
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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.
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