A5079829569- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Smart Materials for Construction
- Optical Coatings and Gratings
- Metamaterials and Metasurfaces Applications
- Optical Network Technologies
- Advanced optical system design
- Concrete Corrosion and Durability
- Advanced Surface Polishing Techniques
- Graphene research and applications
- Surface Roughness and Optical Measurements
- Carbon Nanotubes in Composites
- Mechanical and Optical Resonators
- Advancements in Photolithography Techniques
- Conducting polymers and applications
- Thermal Radiation and Cooling Technologies
- Advanced MIMO Systems Optimization
- Analytical Chemistry and Sensors
- Advanced Wireless Communication Techniques
- Nonlinear Optical Materials Studies
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Battery Technologies Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Optical Imaging Technologies
Wuhan University
2020-2024
Nanjing Xiaozhuang University
2023-2024
Swansea University
2023
Yangtze University
2022-2023
Massachusetts Institute of Technology
1994-2019
Lam Research (United States)
2019
East China University of Science and Technology
2013-2016
University of Cincinnati
2010-2014
Wuhan Institute of Bioengineering
2013
KTH Royal Institute of Technology
2009-2012
Dynamically reconfigurable metasurfaces open up unprecedented opportunities in applications such as high capacity communications, dynamic beam shaping, hyperspectral imaging, and adaptive optics. The realization of performance metasurface-based devices remains a great challenge due to very limited tuning ranges modulation depths. Here we show that widely tunable metasurface composed optical antennas on graphene can be incorporated into subwavelength-thick cavity create an electrically...
Plasmonic antennas enable the conversion of light from free space into subwavelength volumes and vice versa, which facilitates manipulation at nanoscale. Dynamic control properties is desirable for many applications, including biochemical sensors, reconfigurable meta-surfaces compact optoelectronic devices. The combination metallic structures graphene, has gate-voltage dependent optical properties, emerging as a possible platform electrically controlled plasmonic In this paper, we...
The advent of chemical vapor deposition (CVD) grown graphene has allowed researchers to investigate large area graphene/n-silicon Schottky barrier solar cells. Using chemically doped graphene, efficiencies nearly 10% can be achieved for devices without antireflective coatings. However, many reported in past literature often exhibit a distinctive s-shaped kink the measured I/V curves under illumination resulting poor fill factor. This behavior is especially prevalent with pristine (not doped)...
Graphene is an attractive photoconductive material for optical detection due to its broad absorption spectrum and ultrashort response time. However, it remains a great challenge achieve high responsivity in graphene detectors because of graphene's weak (only 2.3% the monolayer sheet) short photocarrier lifetime (<1 ps). Here we show that metallic antenna structures can be designed simultaneously improve both light collection detectors. The coupled antennas concentrate free space into...
Graphene is emerging as a broadband optical material which can be dynamically tuned by electrostatic doping. However, the direct application of graphene sheets in optoelectronic devices challenging due to graphene's small thickness and resultant weak interaction with light. By combining metal hybrid plasmonic structure, it possible enhance graphene–light thus achieve situ control response. We show that effective mode index bonding metal–insulator–metal (MIM) waveguides particularly sensitive...
Portable electronic devices have become increasingly widespread. Because these cannot always be tethered to a central grid, powering them will require low‐cost energy harvesting technologies. As response this anticipated demand, study demonstrates transparent organic solar cells fabricated on flexible substrates, including plastic and paper, using graphene as both the anode cathode. Optical transmittance of up 69% at 550 nm is achieved by combining highly electrodes with polymers that...
Efficient broadband coupling of light between a dielectric waveguide and hybrid plasmonic is investigated theoretically. A linear taper used as coupler which connects the two types waveguides. Broadband realized by such compact with length only 0.4 microm, achieves efficiency 70% (1.5 dB) at 1.55 microm telecommunication wavelength.
In this work, we leverage graphene's unique tunable Seebeck coefficient for the demonstration of a graphene-based thermal imaging system. By integrating graphene based photothermo-electric detectors with micromachined silicon nitride membranes, are able to achieve room temperature responsivities on order ~7-9 V/W (at λ = 10.6 μm), time constant ~23 ms. The large responsivities, due combination isolation and broadband infrared absorption from underlying SiN membrane, have enabled detection as...
We introduce far-infrared graphene plasmonic crystals. Periodic structural perturbation—in a proof-of-concept form of hexagonal lattice apertures—of continuous medium alters delocalized dynamics, creating bands in manner akin to photonic Fourier transform infrared spectroscopy demonstrates band formation, where irradiation excites unique set selected by phase matching and symmetry-based selection rules. This engineering may lead new class devices.
Extreme ultraviolet lithography (EUVL) has been demonstrated to meet the industrial requirements of new-generation semiconductor fabrication. The development high-power EUV sources is a long-term critical challenge implementation EUVL in high-volume manufacturing (HVM), together with other technologies such as photoresist and mask. Historically, both theoretical studies experiments have clearly indicated that CO2 laser-produced plasma (LPP) system promising solution for source, able realize...
Asymmetric directional coupling between a hybrid plasmonic waveguide with subwavelength field confinement and conventional dielectric is investigated. The proposed coupler features short length, high efficiency, extinction ratio, low insertion loss; it can also be integrated into silicon-based platform. This potentially adopted for signal routing waveguides in photonic circuits. Furthermore, exploited to efficiently excite modes modes.
The Cu-filling process in through-silicon via (TSV-Cu) is a key technology for chip stacking and three-dimensional vertical packaging. During this process, defects resulting from chemical-mechanical planarization (CMP) annealing severely affect the reliability of chips. Traditional methods defect characterization are destructive cumbersome. In study, new inspection method was developed using Mueller matrix spectroscopic ellipsometry. TSV-Cu with 3-μm-diameter 8-μm-deep Cu filling showed...
Experimental demonstration of silicon nanowires based hybrid plasmonic waveguides and couplers with subwavelength mode confinement at the near infrared wavelength λ=980 nm are presented. By measuring radiating light from discontinuities in a nanowire, estimated propagation length waveguide is about 30 μm (corresponding to loss ∼0.14 dB/μm). For coupler, experimental results show that modes can be efficiently coupled between two overlapping only 1.9 long coupling length.
A series of two-dimensional diketopyrrolopyrrole-based low band gap conjugated polymers were synthesized. Replacing thiophene with thieno[3,2-b]thiophene in the side chain and bridge resulted significant changes to optical, electrochemical, morphological properties polymers, as well subsequent performance devices made from these materials. The polymer a instead exhibited an increased absorption coefficient hole mobility, highest power conversion efficiency (5.34%) this polymers. This finding...
Abstract New soluble MoS 2 nanosheets covalently functionalized with poly( N ‐vinylcarbazole) (MoS –PVK) were in situ synthesized for the first time. In contrast to and /PVK blends, both solution of –PVK DMF –PVK/poly(methyl methacrylate) (PMMA) film show superior nonlinear optical limiting responses. The –PVK/PMMA shows largest coefficients ( β eff ) about 917 cm GW −1 at λ =532 nm (cf. 100.69 /PMMA 125.12 /PVK/PMMA) 461 =1064 −48.92 147.56 /PVK/PMMA). A larger effect, thresholds 0.3 −2 0.5...
CoFe alloy nanoparticles (NPs) encapsulated in a three-dimensional (3D) honeycomb-like porous N-doped graphitic carbon (CoFe/N-GC) framework were fabricated by facile polymer thermal treatment method.