We propose and demonstrate a novel elliptical microdisk resonator which enables single-mode operation with high
quality (Q) factor. Such elliptical microdisk resonators with pedestal, which consist of plenty of smoothly changing
bends with modified curvature radii, can easily achieve single-mode operation due to selective losses introduced by
mode transmission mismatches and small curvature radii portion inside the elliptical microdisks. We fabricated the
devices on silicon-on-insulator (SOI) platform. Single-mode resonance with high quality factor (Q) of ~105 was
experimentally realized. Besides, the proposed elliptical microdisk provides larger coupling strength compared to normal
circular microdisk, and hence enables critical coupling with easy-to-fabricate gaps.
SOI (silicon-on-insulator)-based micro-resonator is the key building block of silicon photonics, which is considered as a
promising solution to alleviate the bandwidth bottleneck of on-chip interconnects. Silicon-based sub-micron waveguide,
microring and microdisk devices are investigated in Institute of Semiconductors, Chinese Academy of Sciences. The
main progress in recent years is presented in this talk, such as high Q factor single mode microdisk filters, compact thirdorder
microring filters with the through/drop port extinctions to be ~ 30/40 dB, fast microring electro-optical switches
with the switch time of < 400 ps and crosstalk < -23 dB, and > 10 Gbit/s high speed microring modulators.