Fig. 2: Optical performance characterization.
From: Scalable photonic-phonoinc integrated circuitry for reconfigurable signal processing
a False-color scanning electron microscope (SEM) image of an optical ring resonator (red) and a thermo-optic heater (yellow). b Through-port transmission with three optical ring resonators with resonances labeled in blue, red, and, purple respectively. Corresponding free-spectral ranges are labeled for each optical ring resonator. c Resonant wavelength shifts of the three optical ring resonators under thermo-optic tuning. d Drop-port transmission of the three optical ring resonators with resonances tuned at 1553.7 nm (λ1), 1554.0 nm (λ2), and 1554.3 nm (λ3), respectively.
