Yaozong Li - IEEE Xplore Author Profile

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We report the fabrication of the integrated deformable resonators with strong optomechanical interactions in the double-layer crystalline silicon platforms along with the experimental observation of the sustainable optomechanical oscillations (up to 75 MHz). This enables novel on-chip RF-photonics applications and wide-band high-speed integrated optical switches.Show More
We integrate hexagonal boron nitride (h-BN)-encapsulated graphene on top of a compact silicon microdisk resonator for modulation applications. We demonstrate reduced graphene resistance through h-BN encapsulation and showed active tuning of the optical mode through voltage-gated graphene.Show More
We report for the first time the fabrication of high-Q SiC resonators on a 3C SiC-on-insulator platform (with no undercutting) formed using direct wafer bonding. We demonstrate Q of 42, 000 for a 20 μm radius microdonut resonator with a great potential for higher Qs by chemical-mechanical polishing.Show More
We demonstrate a hybrid double-layer-crystalline-silicon on silicon nitride platform formed by a two-step of bonding process. We report high Q of 400, 000 for a 40 μm radius microresonator in the platform using evanescent coupling between different layers.Show More
We present a simple device architecture enabled by an effective fabrication process to realize high-Q, ultra-compact microresonators with large free spectral ranges on silicon nitride at visible wavelengths. We demonstrate Qs >60 K for microdisks with radii as small as 2.5 μm.Show More
We present a hybrid resonant linear frequency comb generator and a modulator for pulse formation and fast electro-optic modulation. Integrated in a hybrid silicon-on-silicon nitride platform, such devices utilize the high-speed plasma dispersion in Si and high-Q resonance in SiN.Show More
Strong enhancement of Raman signal upon integration of trilayer MoS2 with Fabry-Perot (FP) optical cavities is reported. We also discuss prospective application of enhanced light matter interaction in 2D materials for energy harvesting purposes.Show More
We demonstrate a hybrid material platform, in which a layer of crystalline silicon is placed on top of a silicon nitride on a silicon dioxide die. We also report an efficient interlayer coupling structure with 0.02 dB insertion loss. Using this hybrid platform, high-Q resonators are demonstrated.Show More
We investigate polarization cross-coupling between modes of microring resonators and waveguides due to structural asymmetries. We experimentally demonstrate the coupling between a double-layer SOI waveguide fundamental TM mode and microring higher-order radial TE modes.Show More
Monolayer graphene sheet has been integrated on top of small disk optical resonator in SOI platform. Electro-optic interaction between graphene and whispering gallery mode of the cavity has been demonstrated and studied for modulation application.Show More
We report a high optical-quality double-layer silicon (Si) material platform with a thin interface oxide using a low-temperature wafer bonding technique. To assess the quality of the platform, resonators with different radii are fabricated, and their quality factors (Q) are measured. Q's of 25 k and 350 k are demonstrated in 2-μm- and 20-μm-radius microring resonators, respectively. The former is ...Show More
We report the development of a high quality bi-layer silicon material platform using wafer bonding. We have experimentally demonstrated high quality-factor resonators (>200,000) in this material platform for both TE and TM polarizations.Show More
We report microresonators with the highest Q on a double-layer SOI material platform developed using wafer bonding. We also demonstrate 2 μm radius resonators with Q's>20k which are the most compact resonators on such platforms.Show More