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Phase change materials combined with silicon photonics are emerging as a promising platform to realize miniature photonic devices. We study the basic optical properties of a subwavelength-dimension silicon ridge waveguide with a 20-nm-thick Ge2Sb2Te5 (GST) top-clad layer. Numerical simulations show that the effective index of the Si-GST hybrid waveguide varies significantly when the GST changes from...
We report a microring optical filter using Vernier effect. Tuning is enabled by a p-i-p resistor-based micro-heater integrated inside the resonators. Experiments show the filter wavelength can be tuned by 47 nm.
We present a reflective-type delay line using side-coupled integrated spaced sequence of resonators (SCISSOR) terminated with a Sagnac loop reflector. With 13 microrings, group delay of ∼150 ps is achieved with 170 GHz bandwidth.
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