A5087584600- Photonic and Optical Devices
- Neural Networks and Reservoir Computing
- Optical Network Technologies
- Mechanical and Optical Resonators
- Nanofabrication and Lithography Techniques
- Nanowire Synthesis and Applications
- Advanced Fiber Optic Sensors
- Optical Coatings and Gratings
- Photonic Crystals and Applications
- Silicon Nanostructures and Photoluminescence
- Plasmonic and Surface Plasmon Research
- Semiconductor Lasers and Optical Devices
- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Advanced Fluorescence Microscopy Techniques
- Experimental Learning in Engineering
- Advanced Memory and Neural Computing
- Advanced Photonic Communication Systems
- Supercapacitor Materials and Fabrication
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Advancements in Photolithography Techniques
- Space Satellite Systems and Control
- Inertial Sensor and Navigation
- Advanced Biosensing Techniques and Applications
Huawei Technologies (Canada)
2021-2023
University of British Columbia
2017-2022
Harbin Institute of Technology
2015-2016
Microbial fuel cells (MFCs) are able to directly convert about 50 90% of energy from oxidation organic matters in waste electricity and have great potential application broad fields such as wastewater treatment. Unfortunately, the power density MFCs at present is significantly lower than theoretical value because technical limitations including low bacteria loading capacity difficult electron transfer between electrode. We reported a three-dimensional (3D) graphene aerogel (GA) decorated...
In this paper, a novel silicon photonic waveguide for high sensitivity label-free sensor is presented. We use silicon-on-insulator subwavelength waveguides that consist of five rows periodic squares with 60 nm gap distances between each square (multibox structure) to construct microring resonators achieve higher bulk and surface sensitivities than the using conventional strip waveguides. Due contact area low optical confinement proposed multibox waveguides, resonator can be significantly...
A successful design, fabrication and test of silicon photonic circuits requires design tools, process kits (PDKs), foundries for fabrication, facilities. This paper describes the complete flow using rapid-prototyping multiproject wafer foundry processes available in SiEPIC program. The focus this is on rapid prototyping based electron beam lithography as an alternative complementary to what via deep-UV lithography-based foundries. We describe detail PDK use open-source commercial tools...
Thanks to advanced semiconductor microfabrication technology, chip-scale integration and miniaturization of lab-on-a-chip components, silicon-based optical biosensors have made significant progress for the purpose point-of-care diagnosis. In this review, we provide an overview state-of-the-art in evanescent field biosensing technologies including interferometer, microcavity, photonic crystal, Bragg grating waveguide-based sensors. Their sensing mechanisms sensor performances, as well real...
Sub-wavelength grating (SWG) metamaterials have been considered to provide promising solutions in the development of next-generation photonic integrated circuits.In recent years, increasied interest has paid silicon planar biosensors based on SWG geometries for performance enhancement.In this work, we demonstrate a highly sensitive label-free phase-shifted Bragg (PSBG) sensing configuration, which consists sub-wavelength block arrays both propagation and transverse directions.By introducing...
Abstract We propose a photonic processing unit for high-density analog computation using intensity-modulation-based microring modulators (IM-MRMs). The output signal at the fixed resonance wavelength is directly intensity modulated by changing extinction ratio (ER) of IM-MRM . Thanks to intensity-modulated approach, proposed less sensitive inter-channel crosstalk. Simulation results reveal that design offers maximum 17-fold increase in channel density compared its wavelength-modulated...
We demonstrate a method to predict the photolithography effects of 193 nm deep ultraviolet (DUV) process, and we build lithography model using physical measurements on fabricated test pattern. Our accurately predicts proximity smoothing that are characteristic DUV lithography. verify accuracy by visually inspecting patterns comparing them predicted ones. Additionally, shapes, compare experimental benchmark device (the contra-directional coupler) against those our predicted, computed...
Thanks to advanced semiconductor microfabrication technology, chip-scale integration and miniaturization of lab-on-a-chip components, silicon-based optical biosensors have made significant progress for the purpose point-of-care diagnosis. In this review, we provide an overview state-of-the-art in evanescent field biosensing technologies including interferometer, microcavity, photonic crystal, Bragg grating waveguide-based sensors. Their sensing mechanisms sensor performances, as well real...
Massive multiple-input multiple-output (MIMO) systems are considered as one of the leading technologies employed in next generations wireless communication networks (5G), which promise to provide higher spectral efficiency, lower latency, and more reliability. Due massive number devices served by base stations (BS) equipped with large antenna arrays, massive-MIMO need perform high-dimensional signal processing a considerably short amount time. The computational complexity such data...
Commercial silicon photonic (SiP) biosensor architectures rely on expensive swept-tunable lasers that limit their use for widespread, point-of-care applications. An alternative is the of fixed wavelength integrated directly a platform. This study investigates design considerations such architectures.
Biosensors based on silicon photonic integrated circuits have attracted a growing interest in recent years. The use of sub-micron waveguides to propagate near-infrared light allows for the drastic reduction optical system size, while increasing its complexity and sensitivity. Using as propagating medium also leverages fabrication capabilities CMOS foundries, which offer low-cost mass production. Researchers deeply investigated sensor devices, such ring resonators, interferometers crystals,...
We propose a strategy to improve sensing performance of sub-wavelength-grating (SWG) waveguide-based sensors by introducing substrate-overetch (SOE) geometry. The proposed SOE-SWG waveguide shows enhanced analyte interaction and reduced group index, which improves the sensitivity resonator-based sensors. SiO2 overetch process was realized in Ar/C4F8/O2 plasma for 40 sec with SiO2/Si selectivity 10:1, obtaining 285-nm anisotropic layer. Sensor architecture is characterized using isopropyl...
We propose and demonstrate a cost-effective, microring-based, silicon photonic sensor that uses doped detectors broadband source. Shifts in the sensing microring resonances are electrically tracked by second microring, which acts as both tracking element photodetector. By power supplied to this ring, ring's resonance shifts, effective refractive index change caused analyte is determined. This design reduces cost of system eliminating high-cost, high-resolution tunable lasers, fully...
We demonstrate a method to emulate the optical performance of silicon photonic devices fabricated using advanced deep-ultraviolet lithography (DUV) processes on rapid-prototyping electron-beam process. The is enabled by computational predictive model generated processing SEM image data DUV experimentally emulation method's accuracy integrated Bragg grating waveguides and grating-based, add-drop filter devices, two that are particularly susceptible effects. allows device system designers...
Novel sub-wavelength silicon photonic waveguides for label-free sensors are demonstrated in this article. We use silicon-on-insulator (SOI) that consist of grating (SWG) structures, where the made small arrays (180 × 180 nm<sup>2</sup> rectangles with 60 nm gaps). They used to form microring and Bragg resonators which measure change refractive index by monitoring resonant wavelength shift. Due high surface contact area low optical confinement proposed waveguide, sensitivity (both bulk...
In the maturing field of silicon photonics, advances continue in both design and process improvements. Waveguide propagation loss is strongly affected by sidewall roughness, so for fabrication using e-beam lithography, influenced writing parameters. Here, authors look specifically at fracturing strategies data preparation find significant reduction waveguide utilizing advanced options. For our evaluation, fabricate optical waveguides a well-characterized, highly stable baseline with hydrogen...
We introduce our accomplishments to improve the sensor performance of SOI-based biosensors by applying sub-wavelength grating configurations. Sensitivities, intrinsic detection limits, and their capability for small molecule are characterized.
Abstract In this paper, a novel 2 × Mach–Zehnder-interferometer (MZI)-based dot-product calculator is proposed and analyzed in the silicon-on-insulator (SOI) platform. To calculate dot product, phase-shifted Bragg grating (PSBG) modulator placed each arm of MZI for phase modulation at resonant wavelength, followed by 3 dB directional coupler (DC) as output to convert difference into intensity distribution across bar cross ports. Moreover, an electro-absorption (EAM) implemented between PSBG...
Integrated photonics, an emerging branch of photonics in micron-scale proximity, has drawn tremendous attention due to its capability for the generation, manipulation and detection optical signals on a single chip. Microring modulators (MRMs) Mach-Zehnder (MZMs) are two frequently used photonic devices modern electro-optic communications that also play important role development computing systems [1] , [2] . However, their modulation technique which is based operational wavelength-peak drift...
An innovative undergraduate level Nanofabrication course with a focus on photonics is proposed. This challenges the definition of what constitutes an class in research-intensive university. Namely, instructor and teaching assistants (TAs) propose moderately challenging graduate-level research project that has not been previously published; challenge Team, consisting students, TAs instructor, to during class, as Team; have Team collaborate writing paper goal submitting it archival journal....
We experimentally demonstrated the suitability of phase-shifted Mach-Zehnder interferometric device to support real-time sensing monitoring using an intensity interrogation scheme. The proposed sensor presents a sensitivity ∼ 810 dB/RIU with broadband light source.