A5007639472- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
- Neural Networks and Reservoir Computing
- Mechanical and Optical Resonators
- Advanced Photonic Communication Systems
- Advanced MEMS and NEMS Technologies
- Analytical chemistry methods development
- Integrated Circuits and Semiconductor Failure Analysis
- Plasmonic and Surface Plasmon Research
- Adaptive optics and wavefront sensing
- Advancements in PLL and VCO Technologies
- Analytical Chemistry and Sensors
- Oral microbiology and periodontitis research
- Optical Systems and Laser Technology
- Optical Coatings and Gratings
- Marine Biology and Environmental Chemistry
- Advanced Machining and Optimization Techniques
- Optical Wireless Communication Technologies
- Optical Polarization and Ellipsometry
- Advanced MIMO Systems Optimization
- Quantum optics and atomic interactions
University of California, San Diego
2019-2025
Soochow University
2024
Northeastern University
2024
Institute of Semiconductors
2024
Chinese Academy of Sciences
2023-2024
Nanjing University of Aeronautics and Astronautics
2019-2024
Southeast University
2024
Dalian University of Technology
2018-2023
Dalian University
2023
Shanghai Institute of Microsystem and Information Technology
2023
We present a programmable silicon photonic integrated circuit (PIC) that can be configured to show nonlinear nonreciprocal transmission at high optical input power. Nonreciprocal in PICs is of fundamental importance various fields. Despite diverse approaches generate transmission, the research on efficient control this effect still scarce. The PIC presented here has linear and behavior using phase shifters. In regime (high power), device either reciprocal or between opposite propagation...
Abstract Reconstructive spectrometers, which leverage the compressive sensing technique and computational algorithm, are promising solutions for high‐performance integrated spectrometers. Among various options realizing reconstructive stratified waveguide filters (SWFs) have emerged as a particularly attractive choice due to their ultra‐compact size high performance. However, previous demonstrations of SWFs on silicon substrates suffered from suboptimal non‐reproducible spectrometer...
Quantitative optical phase information provides an alternative method to observe biomedical properties, where conventional imaging fails. Phase retrieval typically requires multiple intensity measurements and iterative computations ensure uniqueness robustness against detection noise. To increase the measurement speed, we propose a single-shot quantitative with metasurface optics that can be conveniently integrated into systems minimal modification. The improvement of speed is simultaneously...
We comprehensively simulate and experimentally demonstrate a novel approach to generate tunable electromagnetically induced transparency (EIT) in fully integrated silicon photonics circuit. It can also fast slow light. The circuit is single ring resonator with two reflectors inside, which form an embedded Fabry-Perot (FP) cavity inside the cavity. mode of FP be controlled by tuning reflections using thermo-optic tuners. Under correct conditions, interaction resonance will Fano EIT response....
Abstract Silicon optical ring resonators are potentially valuable for many applications. Due to the limited design freedom (coupling coefficient and roundtrip length), functionality performance cannot always be fully explored optimized. In addition, high‐contrast silicon suffer from parasitic coupling between their clockwise counterclockwise modes as well input both circulating modes, which degrades or even distorts response. Herein, an overview is given harness these effects additional...
Abstract An ultra‐high resolution Fourier transform spectrometer (FTS) realized in silicon photonic platform that can operate with broad band, narrow band as well a combination of and signals is reported. The the achieved by exploiting multiple techniques: Michelson interferometer (MI) structure to increase optical path delay (OPD), hybrid waveguide design reduce insertion loss, an optimized heater air trenches achieve higher thermal efficiency. Moreover, further OPD its resolution, novel...
In miniature ion trap mass spectrometry, achieving a balance between isolation resolution and efficiency is formidable challenge. The presence of absorption curves causes target ions to inadvertently absorb energy from AC signal components near their resonant frequencies. To mitigate this issue, SAM–SFM waveforms introduce parameter known as the decreasing factor. Unlike SWIFT waveforms, SAM–SFM's spectral profile intentionally departs rectangular window, adopting an arch-shaped excitation...
We demonstrate the use of stochastic collocation to assess performance photonic devices under effect uncertainty.This approach combines high accuracy and efficiency in analyzing device variability with ease implementation sampling-based methods.Its flexibility makes it suitable be applied a large range devices.We compare method Monte Carlo technique on numerical analysis silicon directional couplers.
This document provides detailed information on the status of Advanced and Novel Accelerators techniques describes steps that need to be envisaged for their implementation in future accelerators, particular high energy physics applications. It complements overview prepared update European Strategy particle physics, a description field. The scientific priorities community are described each technique acceleration able achieve accelerating gradient GeV~range or above. ALEGRO working group...
We present chirped anti-symmetric multimode nanobeams (CAMNs) based on silicon-on-insulator platforms, and describe their applications as broadband, compact, reflection-less, fabrication-tolerant TM-pass polarizers polarization beam splitters (PBSs). The structural perturbations of a CAMN ensure that only contradirectional coupling between symmetric modes is possible, which can be exploited to block the unwanted back reflection device. new possibility introducing large chirp an ultra-short...
The growth of Sn-rich group-IV semiconductors at the nanoscale can enrich understanding fundamental properties metastable GeSn alloys. Here, we demonstrate effect conditions on morphology and composition Ge/GeSn core/shell nanowires by correlating experimental observations with a theoretical interpretation based multiscale approach. We show that cross-sectional changes from hexagonal to dodecagonal upon increasing supply Sn precursor. This transformation strongly influences distribution as...
A differential-pressure fiber-optic airflow (DPFA) sensor based on Fabry-Perot (FP) interferometry for wind tunnel testing is proposed and demonstrated. The DPFA can be well coupled with a Pitot tube, similar to the operation of differential diaphragm capsule in airspeed indicator aircraft. For pressure sensing between total static airflow, an FP cavity formed fiber end-face, tubule inserted into cavity. According principle derived from Bernoulli’s equation, velocity determined by monitoring...
We present an experimental realization of a pseudo single-mode silicon ring resonator with ultra-wide free spectral range and tuning range. The device is single microring tunable reflector integrated inside. designed to have zero reflection for only one resonance the ring, while all other resonances will suffer strong reflection. Given that inside leads splitting degradation extinction ratio (ER), we obtain where has large ER, others very low ER. ER can be continuously tuned using metal...
We experimentally demonstrate a silicon photonic chip-scale 16-channel wavelength division multiplexer (WDM) operating in the O-band. The chip consists of common-input bus waveguide integrated with sequence 16 spectral add-drop filters implemented by 4-port contra-directional Bragg couplers and resonant cladding modulated perturbations. combination these features reduces bandwidth improves crosstalk. An apodization perturbations between add/drop waveguides is used to optimize strength...
In this paper, we theoretically propose and experimentally demonstrate the manipulation of a novel degree freedom in ring resonators, which is coupling from clockwise input to counterclockwise propagating mode (and vice versa).We name mechanism backcoupling, contrast with normal forward-coupling directional coupler.It well known that internal reflections will cause peak splitting resonator.Our previous research demonstrated asymmetry be strongly influenced by backcoupling.Thus, it worth...
We report an advanced Fourier transform spectrometer (FTS) on silicon with significant improvement compared our previous demonstration in [ Nat. Commun. 9 , 665 ( 2018 ) 2041-1723 ]. retrieve a broadband spectrum (7 THz around 193 THz) 0.11 or sub nm resolution, more than 3 times higher previously demonstrated Moreover, it effectively solves the issue of fabrication variation waveguide width, which is common photonics. The structure balanced Mach–Zehnder interferometer 10 cm long serpentine...
An ultrasensitive method for the determination of tributyltin and inorganic tin has been developed by in situ concentration hydrides on a zirconium coated graphite tube with subsequent detection electrothermal atomic absorption spectrometry (ETAAS). Characteristic mass values 20 14 pg were obtained tin, respectively, where characteristic is defined as that analyte which provides peak absorbance 0.0044 A. The relative standard deviations ten replicate measurements 5.6% 3.4% tin. For...
Silicon photonics (SiPh) has emerged as a promising technology for photonic integrated circuits (PICs). One of the basic components in SiPh is directional coupler (DC), which plays an important role signal monitoring with requirement low wavelength dependence and loss. This paper proposes broadband low-loss DC designed power tapping on 3 μm silicon-on-insulator (SOI) waveguide platform. By utilizing advantages multi-micron waveguides replacing one straight optimized arc-shaped coupling...
A method for the determination of alkylselenides by gas chromatography (GC)–electrothermal atomic absorption spectrometry is proposed. Dimethylselenide, diethylselenide and dimethyldiselenide were separated GC, followed introduction compounds into a graphite furnace sequentially; then adsorbed onto palladium coated wall. Sufficient time was allowed operation programme during interval between each elution peak. The sensitivities expressed as characteristic mass giving 0.0044 absorbance are...
The emerging grave consequences of conventional coolants on health, ecology and product quality, have pushed the scientific research to explore eco-friendly lubrication technique. Electrostatic minimum quantity (EMQL) has been underscored as a burgeoning technology cut-down bete noire impacts in machining. This confers adoption negatively charged cold mist air-castor oil employed turning aluminium-6061T6 material by varying cutting conditions, per experimental designed through response...
Current silicon waveguide Bragg gratings typically introduce perturbation to the optical mode in form of modulation width or cladding. However, since such a approach is limited weak perturbations avoid intolerable scattering loss and higher-order modal coupling, it difficult produce ultra-wide stopbands. In this Letter, we report an ultra-compact grating device with strong by etching nanoholes core enable ultra-large stopband apodization achieved proper location nanoholes. With approach, 15...
The large-area capacitive discharges driven at very high frequencies have been attracting much attention due to their wide applications in material etching and thin film deposition. However, the regime, standing wave effect (SWE) becomes a major limitation for plasma processing uniformity. In this work, fiber Bragg grating sensor was utilized observation of SWE discharge reactor by measuring radial distribution neutral gas temperature Tg. influences RF power working pressure on profiles Tg...