A5070936468- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Acoustic Wave Phenomena Research
- Metamaterials and Metasurfaces Applications
- Advanced MEMS and NEMS Technologies
- Advanced Photonic Communication Systems
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
- Music Technology and Sound Studies
- Millimeter-Wave Propagation and Modeling
- Optical Network Technologies
- Neural Networks and Reservoir Computing
- Semiconductor Lasers and Optical Devices
- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Hearing Loss and Rehabilitation
Intel (United States)
2024
Georgia Institute of Technology
2014-2022
University of British Columbia
2022
Phononic crystals (PnCs) have been studied extensively for two decades, as an enticing platform ultrahigh-frequency signal processing. However, struggles with geometric scaling and efficient coupling of acoustic energy at the microscale hindered development basic building blocks devices. Through a systematic design approach, this study demonstrates waveguiding in pillar-based PnC slabs operating GHz regime, laying foundation more sophisticated signal-processing systems built PnCs.
An ultra-narrow 40-nm slotted waveguide is fabricated to enable highly efficient, electro-optic polymer modulators. Our measurement results indicate that VπL's below ∼ 1.19 V.mm are possible for the balanced Mach-Zehnder modulators using this on a hybrid silicon-organic platform. simulations suggest can be further reduced 0.35 if appropriate doping utilized. In addition adapting standard recipes, we developed two novel fabrication processes achieve miniaturized devices with high modulation...
In this letter, we demonstrate a new design for integrated phononic crystal (PnC) resonators based on confining acoustic waves in heterogeneous waveguide-based PnC structure. architecture, waveguide that supports single mode at the desired resonance frequencies is terminated by two sections with no propagating those (i.e., have gap). The proposed are designed through combining spatial-domain and spatial-frequency domain k-domain) analysis to achieve smooth envelope. This approach can benefit...
We demonstrate the first quantum dot lasers integrated with 300mm silicon photonics. The measured devices show a linewidth enhancement factor near zero and are resilient to optical feedback up -16dB of back reflection.
The promise of surface phononic crystals (PnCs) for $e.g.$ rf signal processing in wireless communication (like your mobile phone) has not been realized, due to the complexity acoustic wave propagation such structures, plus lack a low-loss, CMOS-compatible platform. authors identify wide, hypersonic band gap pillar-based PnC. significance their platform lies reduced material loss dielectric pillars, and use AlN. This allows dense integration low-loss devices with electronics on same die,...
We study theoretically stimulated Brillouin scattering (SBS) in silicon nitride (SiN) waveguides created as a phononic line defect inside pillar-based phononic-crystal membrane of the same material for efficient confinement generated acoustic phonons to optical waveguides. The is carefully designed confine transversally resonating breathing mode band gap host crystal. These modes are well excited by fundamental By optimizing this structure, we show possibility achieving high SBS gain an...
Here, we report the first observation of stimulated Brillouin scattering (SBS) in Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> waveguides. The waveguides are designed as a line defect membrane phononic crystal (MPnC). observed SBS frequency is at 1.55 GHz within bandgap host MPnC.
We report the fabrication of integrated deformable resonators with strong optomechanical interactions in double-layer crystalline silicon platforms along experimental observation sustainable oscillations (up to 75 MHz). This enables novel on-chip RF-photonics applications and wide-band high-speed optical switches.
We present mechanically-tunable microdisk resonators using electrostatic actuation in double-layer-SOI material platform. The possibility of achieving resonance wavelength shifts as-high-as 5.5 nm/volt and 1.35 nm/nm over a tuning range 35 nm is demonstrated.
This paper presents a new formulation for the fast and accurate three-dimensional vectorial analysis of dielectric whispering-gallery-mode (WGM) resonators using finite element method (FEM). relies on two properties WGM resonators: (1) axial symmetry to reduce number coordinate variables from three (2) use divergence equation magnetic field its express azimuthal component in terms transverse components. As result, our FEM analysis, only part Helmholtz is required, which composed variables....
Effective infiltration and polling of electro-optic polymer (EOP) inside world-record vertical slot 40 nm is demonstrated for a Mach-Zehnder modulator on hybrid Si/SiN/EOP platform with highly-linear high-power handling performance capabilities.
In this paper, we present a new design for waveguide-based phononic crystal (PnC) resonators in pillar-based piezoelectric membranes at the GHz frequency range based on mode-gap waveguide termination. The mode confinement these is achieved by smooth transition from to another that does not support (and therefore reflects) guided modes of first over certain range. These can be utilized applications including wireless communications and sensing [1, 2] where high-Q high-frequency are highly desirable.
We present stimulated Brillouin (SBS) scattering in SiN based on combining optical waveguides with pillar-based phononic crystals. utilize breathing modes inside the crystals that strongly interact modes, enabling low-threshold GHz SBS.
We present highly-sensitive and compact label-free biosensors based on spiral resonators SOI with high-Q TM-polarized resonant modes, which provide high-sensitivity relatively large sensing area. The sensor performance is characterized using avidin-biotin surface chemistries.