Credit: Light: Science & Applications
a, 3D schematic visualization (ball and stick model) of a-c plane in CCPS structure, b, Transmission electron microscopy (TEM) image along with the selected area diffraction pattern (SADP) of CCPS crystal, c, current- time (I-t) characteristics at ± 5 V along with a schematic representation of Cu distribution, d, 3D schematic representation of the Si microring resonator (MRR) design with integrated CCPS, e, the transmission spectra of MRR at a constant voltage of 7 V as the polling time progressed, across all scans, a consistent blue shift in the resonance wavelengths was observed for all fabricated devices. This blue shift implies an electro-optical modulation of the refractive index of the combined Si/CCPS guiding structure, given that thermal heating typically results in a red shift in the Si-MRR resonance wavelength, additionally, the application of a bias across the device does not affect the extinction ratios and the resonance linewidth, f, coverage length and change in effective refractive index of the 15 tested devices.