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Phase locking of a semiconductor double-quantum-dot single-atom maser

Author(s): Liu, Y-Y; Hartke, TR; Stehlik, J; Petta, Jason R

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Abstract: We experimentally study the phase stabilization of a semiconductor double-quantum-dot (DQD) single-atom maser by injection locking. A voltage-biased DQD serves as an electrically tunable microwave frequency gain medium. The statistics of the maser output field demonstrate that the maser can be phase locked to an external cavity drive, with a resulting phase noise L = -99 dBc/Hz at a frequency offset of 1.3 MHz. The injection locking range, and the phase of the maser output relative to the injection locking input tone are in good agreement with Adler’s theory. Furthermore, the electrically tunable DQD energy level structure allows us to rapidly switch the gain medium on and off, resulting in an emission spectrum that resembles a frequency comb. The free running frequency comb linewidth is approximate to 8 kHz and can be improved to less than 1 Hz by operating the comb in the injection locked regime.
Publication Date: Nov-2017
Electronic Publication Date: 8-Nov-2017
Citation: Liu, Y-Y, Hartke, TR, Stehlik, J, Petta, JR. (2017). Phase locking of a semiconductor double-quantum-dot single-atom maser. PHYSICAL REVIEW A, 96 (10.1103/PhysRevA.96.053816
DOI: doi:10.1103/PhysRevA.96.053816
ISSN: 2469-9926
EISSN: 2469-9934
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW A
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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