A5101690008- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Mechanical and Optical Resonators
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Laser-Matter Interactions and Applications
- Diamond and Carbon-based Materials Research
- Silicon Nanostructures and Photoluminescence
- Adsorption and biosorption for pollutant removal
- GaN-based semiconductor devices and materials
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
- Mechanical Behavior of Composites
- Geotechnical Engineering and Underground Structures
- Extraction and Separation Processes
- Molecular Sensors and Ion Detection
- Heat Transfer and Optimization
- Solar-Powered Water Purification Methods
- Semiconductor Lasers and Optical Devices
- Luminescence and Fluorescent Materials
- Railway Engineering and Dynamics
- Nanoplatforms for cancer theranostics
- Fault Detection and Control Systems
- Nonlinear Optical Materials Research
Singapore University of Technology and Design
2020-2023
Xi'an Aeronautical University
2023
Nanjing Tech University
2022
University of Glasgow
2022
State Key Laboratory of Medicinal Chemical Biology
2019
Nankai University
2019
Zhejiang Gongshang University
2017
State Key Laboratory on Integrated Optoelectronics
2012-2014
Chinese Academy of Sciences
2012-2014
Institute of Semiconductors
2012-2014
Mitochondria are crucial in the process of oxidative metabolism and apoptosis. Their morphology is greatly associated with development certain diseases. For specific long-term imaging mitochondrial morphology, we synthesized a new mitochondria-targeted near-infrared (NIR) fluorescent probe (TPE–Xan–In) by incorporating TPE NIR merocyanine skeleton (Xan–In). TPE–Xan–In displayed both absorption (660 nm) emission peaks (743 region. Moreover, it showed aggregation-induced properties at neutral...
Optical bistability (BI) and self-pulsation (SP) in high-$Q$ silicon microring resonators (MRRs) induced by thermo-optical (TO) effect other nonlinear effects are theoretically studied with coupled mode theory linear stability analysis method. It is found that the boundaries for both BI SP mainly restricted two counteracting effects: free carrier dispersion TO effect. If refractive index changes of a MRR caused these on same order magnitude, output power will exhibit much more complicated...
Spectral tunability methods used in optical communications and signal processing leveraging optical, electrical, acousto-optic effects typically involve spectral truncation that results energy loss. Here we demonstrate temperature tunable broadening using a nonlinear ultra-silicon-rich nitride device consisting of 3-mm-long cladding-modulated Bragg grating 7-mm-long channel waveguide. By operating at frequencies close to the band edge, an apodized grating, access strong grating-induced...
Optical bistability and self-pulsation (SP) in silicon microring resonators (MRRs) are experimentally observed. The waveforms frequencies of SP can be controlled by changing input light power its wavelength, the region modulated readily applying a reverse voltage on PN junction embedded MRR. These phenomena theoretically studied adopting coupled-mode theory linear stability analysis method for differential equations, with theoretical results fitting well experimental ones.
Nonlinear integrated optics leveraging platforms with high nonlinear figure of merit offer energy efficient optical signal processing capabilities. Over the last five years, CMOS-compatible ultra-silico-rich nitride (USRN) has emerged as a promising platform on which to implement various functions. Bandgap engineered maximize Kerr nonlinearity while maintaining two-photon absorption free behavior at telecommunications wavelengths, USRN possesses refractive index that is 100× larger than in...
Abstract Supercontinuum generation is demonstrated in a 3-mm-long ultra-silicon-rich nitride (USRN) waveguide by launching 500 fs pulses centered at 1555 nm with pulse energy of 17 pJ. The generated supercontinuum experimentally characterized to possess high spectral coherence, an average | g 12 exceeding 0.90 across the wavelength range coherence measurement (1260 1700 nm). Numerical simulations further indicate over full spectrum. measured agrees well theoretical based on generalized...
An ultracompact polarization splitter-rotator based on an asymmetric directional coupler has been designed and analyzed. The device consists of one channel waveguide vertical slot waveguide, which couple to each other form the coupler. coupling length is only 17.4 μm, extinction ratio, with its largest value 18 dB, more than 15 dB in operating wavelength range from 1515 1560 nm. TM-to-TE conversion efficiency can reach up 95% (0.02 dB) at 1550 nm wavelength.
We have developed a silicon depletion-mode modulator featuring novel U-type PN junction that enables substantial improvement in electro-optical modulation efficiency. Through electrical, optical, and manufacturing process simulations, an ultralow VπL of 0.63 V·cm is exhibited with 3 V reverse bias. The high efficiency extinction ratio (ER) >17 dB only 1 mm phase shifter when the excess loss at "on" state 2 dB. ER can maintain >12 ∼28 GHz operation peak-to-peak voltage due to small...
A novel high efficiency broadband polarization converter based on an adiabatic tapered vertical slot waveguide is proposed and analyzed. Unlike previously reported converters, this device converts the first-order TM/TE mode into TE/TM mode. The structure utilizes a waveguide, which only needs one-mask etching process. bandwidth ultrawide, ~100 nm (1500-1600 nm) with conversion of > 98%. total length 116 μm, its minimum fabrication tolerance acceptable for modern nanofabrication technology.
Supercontinuum generation (SCG) through soliton fission provides high‐brightness, spectrally‐rich light needed for hyperspectral imaging, broadband spectroscopy, and fluorescence microscopy. The prospect of miniaturization has led to many demonstrations this phenomenon in integrated platforms. However, due the moderate dispersion nonlinearity generally available channel waveguides, femtosecond pulses have typically been required date, as use picosecond would require unpractically long...
Ultra-silicon-rich nitride with refractive indices ~ 3 possesses high nonlinear index-100× higher than stoichiometric silicon and presents absence of two-photon absorption, making it attractive to be used in integrated optics at telecommunications wavelengths. Despite its excellent properties, ultra-silicon-rich photonics devices reported so far still have fairly low quality factors [Formula: see text], which could mainly attributed by the material absorption bonds. Here, we report...
Abstract Chemical vapor deposition-based growth techniques allow flexible design of complementary metal-oxide semiconductor (CMOS) compatible materials. Here, we report the deuterated silicon-rich nitride films grown using plasma-enhanced chemical deposition. The linear and nonlinear properties are characterized, experimentally confirm that with SiD 4 eliminates Si–H N–H related absorption. performance identical waveguides for SiH compared demonstrating a 2 dB/cm improvement in line observed...
This paper develops a finite element (FE) model of the single fibre fragmentation test designed for direct comparison with experimental results on an E-glass/epoxy system by McCarthy et al. (2015). Interface behaviour is modelled via cohesive surface, and stochastic Weibull strengths (determined independent experiments) assigned at random to elements along fibre. Predictions from agree experiment range outputs: The evolution number breaks strain similar occur locations as required. also...
With an efficient methodology, a novel chloromethylated polystyrene-g-2-mercapto-1,3,4-thiadiazole chelating resin (MTR resin) was prepared via one-step reaction. The structure of MTR characterized by elements analysis, Fourier transform infrared spectroscopy, thermogravimetric and scanning electron microscopy. Meanwhile, the adsorption properties for Hg(II) were investigated batch column experiments. results showed that possessed much better capability than other metal ions. statically...
Bragg-soliton dynamics in a 2-stage ultra-silicon-rich-nitride (USRN) chip-based device, consisting of cladding-apodized modulated Bragg grating (CMBG) stage and USRN channel waveguide stage, is studied optimized for enhanced supercontinuum generation. We observe that the enhancement strongly dependent on effect temporal compression developing CMBG which linked to both device input pulse parameters. With optimal parameter combination, spanning 610 nm at −30 dB level experimentally...
Dispersion compensation is demonstrated using on-chip Silicon Nitride Bragg Gratings. Impaired 30GBaud/s NRZ and PAM4 eye diagrams are restored a power penalty improvement of 1.3dB at Bit Error Rate 10 −12 achieved.
The CMOS-compatible AlN photonics platforms developed within Institute of Microelectronics (IME) are presented, and nonlinear index the is reported. devices demonstrated reviewed, future prospective provided.
We present an improved CMOS-compatible USRN material prepared using DCS-based chemistry deposited at a low temperature of ~300°C. Morphology and composition these films are characterized SEM, TEM, EDS AFM. Surface profilometer is also used to estimate the film stress over 8-inch wafer. TEM shows that amorphous AFM measures roughness RMS ~0.4 nm scan window 3 μm x μm. Optical properties studied variable-angle spectroscopic ellipsometry FTIR spectroscopy. A prism coupler propagation...
Nonlinear optical characterization of Silicon-Rich Nitride waveguides fabricated using deuterated silane are presented. Fourier Transform Infrared Spectroscopy reveals the absence Si-H and N-H related bonds known to cause absorption close a wavelength 1550nm.
Temperature tuning of spectral broadening induced by a nonlinear grating is experimentally demonstrated. The bandwidth observed to decrease as temperature increases, corresponding red-shift in the high dispersion region Bragg grating.
The horizontal drop film evaporator is a key component of the mechanical vapor recompression crystallization system, which can be used to evaporate effluent and recycle secondary energy. However, properties heat transfer flow salty sprayed external evaporation tube are obviously different from that ordinary water. We established 3D model for in water sodium sulfate mixture were manufactured reproduce real effluent. By applying VOF (volume fluid) model, liquid-gas interface spray formed on...