Integrated tunable silicon photonic devices for optical filter and delay applications

Abstract

We present our recent work on integrated silicon photonic devices for optical filter and delay applications. A microdisk resonator integrated with interleaved p-n junctions is demonstrated. The resonance can be both blue- and red-shifted by applying a forward current or a negative voltage, respectively. A MZI-nested microring resonator is shown capable of coupling tuning, enabled by a p-i-p junction based thermal heater across the waveguide. We also investigate cascaded self-coupled optical waveguide (SCOW) resonators. Electromagnetically-induced transparency (EIT)-like resonances are generated featuring a narrow lineshape and a high group delay. Finally, we present an athermal lattice filter made up of 10 cascaded Mach-Zehnder interferometer (MZI) units and show that the temperature sensitivity can be considerably reduced.