A solid-state SAW resonator with an internal DC-biased InGaAs amplifier self-oscillates into a coherent phonon laser at 1 GHz, with a resolution-limited linewidth below 77 Hz and -6.1 dBm acoustic output.
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An Electrically Injected and Solid State Surface Acoustic Wave Phonon Laser
A solid-state SAW resonator with an internal DC-biased InGaAs amplifier self-oscillates into a coherent phonon laser at 1 GHz, with a resolution-limited linewidth below 77 Hz and -6.1 dBm acoustic output.