Fig. 3: Acoustic performance characterization.
From: Scalable photonic-phonoinc integrated circuitry for reconfigurable signal processing
a False-color scanning electron microscope (SEM) image of an acoustic ring resonator. b Transmission spectrum of acoustic ring resonators measured with optical detection. Corresponding free-spectral ranges are labeled for each acoustic ring resonator. c One resonance of the third acoustic ring resonator with Lorentz fitting, showing a quality factor over 12 × 103.
