A5101471133- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Photonic Crystals and Applications
- Advanced Battery Materials and Technologies
- Perovskite Materials and Applications
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Conducting polymers and applications
- Optical Network Technologies
- Soil Mechanics and Vehicle Dynamics
- Optical Coatings and Gratings
- Chalcogenide Semiconductor Thin Films
- Agricultural Engineering and Mechanization
- Advanced Optical Sensing Technologies
- Quantum Dots Synthesis And Properties
- Heat Transfer and Optimization
- Refrigeration and Air Conditioning Technologies
- Advanced Surface Polishing Techniques
- Optical Coherence Tomography Applications
- Polymer Surface Interaction Studies
- Diamond and Carbon-based Materials Research
- Advanced MEMS and NEMS Technologies
Harbin Institute of Technology
2023-2024
Northwest A&F University
2023-2024
Northwest Institute of Mechanical and Electrical Engineering
2023-2024
China University of Geosciences (Beijing)
2022-2023
China Institute of Atomic Energy
2023
Tianjin University of Technology
2022
Hebei University of Technology
2022
Sichuan University
2022
University of California, Davis
2015-2021
Xi'an Jiaotong University
2020
In this letter, a wideband 1 bit 12 × reconfigurable beam-scanning reflectarray is designed, fabricated, and measured. The element realized by soldering PIN diode into slotted metallic square patch. To enhance the bandwidth of reflectarray, we choose central frequency at 5.0 GHz whose phase shift 200° where maximum occurs. Phase difference within 180° ± 20° from 4.7 to 5.3 GHz. Utilizing element, antenna fabricated A control board that can display distributions in real time designed regulate...
We design, fabricate, and demonstrate a silicon nitride (Si(3)N(4)) multilayer platform optimized for low-loss compact photonic integrated circuits. The designed platform, with 200 nm thick waveguide core 700 interlayer gap, is compatible active thermal tuning applicable to realizing devices such as arrayed gratings (AWGs). achieve ultra-low loss vertical couplers 0.01 dB coupling loss, crossing of 0.167 at 90° angle, 50 μm bending radius, 100 × 2 μm(2) footprint, lateral misalignment...
High-Ni Li-rich layered oxides (HNLOs) derived from Mn-based (LRMLOs) can effectively mitigate the voltage decay of LRMLOs but normally suffered decreased capacity and cycling stability. Herein, an effective, simple, up-scalable co-doping strategy trace Fe F ions via a facile expanded graphite template-sacrificed approach was proposed for improving performance HNLOs. The far more improve both its rate capability stability in synergistic manner compared to introduction individual cations...
This paper reports design, fabrication, and experimental demonstration of a silicon nitride photonic integrated circuit (PIC). The PIC is capable conducting one-dimensional interferometric imaging with twelve baselines near λ = 1100-1600 nm. consists waveguide pairs, each leading to multi-mode interferometer (MMI) that forms broadband interference fringes or corresponding pair the waveguides. Then an 18 channel arrayed grating (AWG) separates combined signal into signals different...
Electron‐transport layer (ETL) is integral in conventional perovskite solar cells (PSCs), serving as an essential role both the growth of and extraction charge carriers. This dual functionality poses a challenge, especially context ETL all‐air‐processed PSCs. Herein, multifunctional modification strategy proposed, where trisodium citrate (TC) incorporated into SnO 2 precursor. The introduction TC can efficiently inhibit agglomeration nanoparticle also eliminates oxygen vacancy defects...
We report on uniform emission intensity profile, propagation constant silicon gratings for beam steering application with ultra-sharp instantaneous field-of-view (IFOV). To achieve across relatively long length, we designed a custom grating varying Si3N4 width and duty cycle while maintaining narrow divergence pattern. fabricated the Si3N4/Si width/duty together reference 50:50 cycle. The demonstrated angle value of 6.6° by sweeping wavelength between 1530 nm 1575 length over 1 mm. measured...
While compact and low-loss optical coupling to ultrahigh-quality-factor (Q) crystalline resonators is important for a wide range of applications, the major challenge achieving this stems from relatively low refractive index resonator host material compared those standard waveguide materials. We report first demonstration single-mode structure (prism-waveguide coupler) integrated on silicon nitride platform resulting in efficient magnesium fluoride by phase-matched mode-matched evanescent...
Commercialized lithium cobalt oxide (LCO) only shows a relatively low capacity of ≈175 mAh g-1 despite high theoretical ≈274 . As an effective and direct strategy, increasing its charge cutoff voltage can, in principle, escalate the capacity, which is however precluded by irreversible phase transition, oxygen loss, severe side reactions with electrolytes normally. Herein, situ sulfur-assisted solid-state approach proposed for one-pot synthesis long-term highly stable high-voltage LCO novel...
Low-cost Mn- and Li-rich layered oxides suffer from rapid voltage decay, which can be improved by increasing the nickel content to derive high (HNLO) but is normally accompanied reduced capacity inferior cycling stability. Herein, Na or K ions are successfully doped into lattice of Li1.2-xMxNi0.32Mn0.48O2 (M = Na, K) via a facile expanded graphite template-sacrificed approach. Both Na- K-doped samples exhibit excellent rate capability stability compared with un-doped one. The Na-doped sample...
The two-step deposited method with the advantages of high reproducibility and controllability is widely used in fabricating highly efficient perovskite solar cells (PSCs). However, it still a challenge to fabricate air-processed PSCs through this due existing techniques glove box circumstance that are not well extended ambient air-condition fabrication process. Here, hexamethylphosphoramide (HMPA) as solvent additive incorporated into first-step PbI2 precursor solution, which can effectively...
The present study was designed to investigate the in vivo drug release and antibacterial properties of a novel mesoporous hydroxyapatite/chitosan (mesoHA-CS) composite loaded with vancomycin (VCM). VCM-mesoHA/CS prepared via freeze-drying method. successful loading VCM scaffold verified by FT IR analyses. SEM observation revealed structure pore size 50–100 µm. Medicated composites were then implanted into muscular pockets extremity rabbits. results demonstrated that local concentration...
We designed and demonstrated a tri-layer Si3N4/SiO2 photonic integrated circuit capable of vertical interlayer coupling with arbitrary splitting ratios. Based on this multilayer platform each layer thicknesses 150 nm, 50 we simulated the Y-junctions 3D couplers power ratios between 1:10 10:1 negligible(< -50 dB) reflection. design, fabricated 1:1 3:2 excess optical losses 0.230 dB. Further, 1 × 3 ratio 1:1:4 for symmetric structures variable asymmetric structures.
The diagram of the chemical structure BMIMPF 6 and device in this work.
The application method of granular fertilizers and wheat seeds depends on the colter design parameters. In this research, a new double disc is studied to apply horizontal band 12 cm in width deeper 2 than seed level precisely middle band. Applying at different levels increases fertilizer dose without harm seeds. Furthermore, applying high doses decreases competition between suppresses weeds. Therefore, preparing plain seedbed after distributing was research objective. comparison experiments...
NASA is working with US industry and academia to develop Photonic Integrated Circuits (PICs) for: (1) Sensors (2) Analog RF applications (3) Computing free space communications. The PICs provide reduced size, weight, power that critical for space-based systems. We describe recent breakthrough 3D monolithic integration of photonic structures, particularly high-speed graphene-silicon devices on CMOS electronics create CMOS-compatible highbandwidth transceivers ultra-low Terabit-scale optical...
Chemical mechanical polishing (CMP) is a key step in semiconductor technology because it crucial to produce defect-free and flat enough surface for further processing of microelectronic devices. Silicon (Si) wafer widely used integrated circuit (IC) devices, high-density information storage other advanced applications. In this paper, the effect different pH three ethanolamines, such as monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), on removal rate Si was studied. The...
This paper demonstrates rapidly reconfigurable, high-fidelity optical arbitrary waveform generation (OAWG) in a heterogeneous photonic integrated circuit (PIC). The PIC combines advantages of high-speed indium phosphide (InP) modulators and low-loss, high-contrast silicon nitride (Si3N4) arrayed waveguide gratings (AWGs) so that syntheses with rapid updates are possible. generated waveforms spanned 160 GHz spectral bandwidth starting from an frequency comb consisting eight lines separated by...
The Lockheed Martin Advanced Technology Center and the University of California at Davis (UC Davis) has developed an interferometric imaging system based on photonic integrated circuits (PICs). This approach could enable a new hardware architecture with 10× to 100× reduction in size weight compared traditional systems, particularly targeted for space applications. current PIC design consists three-layer waveguides, arrayed waveguide gratings (AWGs) multi-mode interferometers (MMIs) that link...
In northern China, many thermal power plants use absorption heat pump to recover low-grade from turbine exhaust steam due the irreplaceable advantages of in waste recovery. process designing a recovery system, few researchers have considered relationship between design and actual heating load network. Based on characteristics, this paper puts forward idea which uses an for supply. The operation mode system different powers was stated. An economic analysis model proposed, optimal could be...
To achieve future commercialization of perovskite solar cells (PSCs), balancing the efficiency, stability, and manufacturing cost is required. In this study, we develop an air processing strategy for efficient stable PSCs based on 2D/3D heterostructures. The organic halide salt phenethylammonium iodide adopted to in situ construct a heterostructure, which 2,2,2-trifluoroethanol as precursor solvent introduced recrystallize 3D form intermixed phase. This simultaneously passivates defects,...
We design and demonstrate a thin-film z-cut Lithium Niobate photonic platform. report experimental transmission measurement of different passive building blocks at 1.55 μm central wavelength including AWG MMI splitter.
The metering device is the central part of seeder discharging granular fertilizers or seeds from hopper to colter passing through tube. Depending on design, batches particles are discharged evenly. This research analyzes existing devices, and a new pin-roller recommended discharge evenly high doses wheat at low rotation speeds. objective was adapt precision agriculture so that little electric motor containing gearbox drives every device. Therefore, parameters were investigated apply optimal...
We demonstrate hybrid integration of modified uni-traveling carrier photodiodes on a multi-layer silicon nitride platform using total reflection mirrors etched by focused ion beam. The photodetectors show external responsivity 0.15 A/W and bandwidth 3.5 GHz for devices with diameter 80 µm. insertion loss the waveguide is 3 dB coupling efficiency mirror -3 dB. highest RF output power -0.5 dBm measured at 9 mA photocurrent -9 V bias.