2017/07/24 by Y. -Y. Liu, Y.-Y. Liu, Thomas R. Hartke +3 · 11 citations
Physics and Astronomy · #Atom (system on chip) #Atomic physics #Injection locking #Laser #Laser linewidth #Maser #Mechanical and Optical Resonators #Microwave #Nanosecond #Optics #Optoelectronics #Phase (matter) #Phase noise #Physics #Quantum mechanics #Quantum optics and atomic interactions #Semiconductor #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #dBc #quant-ph
paper · pdf · doi:10.1103/physreva.96.053816
published in Physical Review A 96(5) (American Physical Society)
arxiv created 2017/07/24 · openalex publication_date 2017/11/08 · arxiv updated 2017/11/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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=\ensuremath-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 \ensuremath≈8 kHz and can be improved to less than 1 Hz by operating the comb in the injection locked regime.