A5089348821- Photonic and Optical Devices
- Terahertz technology and applications
- 2D Materials and Applications
- Graphene research and applications
- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Advanced Photocatalysis Techniques
- Metamaterials and Metasurfaces Applications
- Advanced Fiber Laser Technologies
- Perovskite Materials and Applications
- Speech Recognition and Synthesis
- Topic Modeling
- Semiconductor Lasers and Optical Devices
- Natural Language Processing Techniques
- Optical Network Technologies
- Advancements in Battery Materials
- Topological Materials and Phenomena
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
- Quantum Dots Synthesis And Properties
- Advanced Photonic Communication Systems
- Nonlinear Optical Materials Studies
- Speech and dialogue systems
- Chalcogenide Semiconductor Thin Films
- Photorefractive and Nonlinear Optics
University of California, Los Angeles
2010-2025
UCLA Health
2024-2025
Fielding Graduate University
2024-2025
Institute of Coal Chemistry
2025
Chinese Academy of Sciences
2023-2025
Tsinghua University
2014-2025
Northwest University
2015-2024
Nanjing Normal University
2023-2024
Institute of Oceanology
2024
University of Chinese Academy of Sciences
2023-2024
We present a systematic investigation of the microscopic mechanism interface interaction, charge transfer and separation, as well their influence on photocatalytic activity heterojunctions by combination theoretical calculations experimental techniques for g-C3N4–ZnWO4 composite. HRTEM results DFT mutually validate each other to indicate reasonable existence g-C3N4 (001)–ZnWO4 (010) (011) interfaces. The show higher degradation MB than pure ZnWO4 under visible-light irradiation. Moreover,...
Nonlinear optics has undergone dramatic developments in the past 60 years, which revolutionized photonic and optoelectronic fields with many essential applications such as electro-optic switching, frequency mixing, optical parametric oscillation, phase conjugation, so forth. As one of new promising candidates for both next-generation photovoltaic devices, halide perovskite semiconductors have attracted extensive research attention because their excellent electrical properties demonstrated...
With the motivation of realizing an all graphene-based circuit for low power, we present a reliable nonvolatile graphene memory device, single-layer (SLG) ferroelectric field-effect transistor (FFET). We demonstrate that exfoliated can be optically visible on lead-zirconate-titanate (PZT) substrate and observe large window is nearly equivalent to hysteresis PZT at operating voltages in FFET. In comparison graphene, FFETs fabricated with chemical vapor deposited (CVD) exhibit enhanced...
Acetylene (C2H2) and copper foil have been chosen as carbon precursor catalyst, respectively, for the synthesis of graphene by atmospheric pressure chemical vapor deposition. The effects hydrogen (H2) concentration on growth studied Raman spectroscopy transmission electron microscopy. Different to methane a precursor, high-quality bilayer films can be grown rapidly with ratio H2 argon (Ar) flow rates (H2/Ar) range from 0.010 0.111. However, further increase (H2/Ar = 0.250 H2/Ar 0.429),...
The band gaps and work functions of monolayer IVB-VIA 2D TMTs MX<sub>3</sub> VIIB-VIA TMDs MX<sub>2</sub> are calculated their alignments the relevant physical origins investigated.
We examined the potential of stacked multilayer graphene as broadband terahertz (THz) antireflection coating based on impedance matching effect in experiment and theory. The reflected pulses from quartz silicon substrates were observed to change with layer number doping concentration coating. Remarkable was achieved due optimized THz conductivity. Theoretical analysis Drude model thin film Fresnel coefficients have been used explain experimental phenomena, which indicated shift Fermi level...
Terahertz (THz) time-domain emission spectroscopy in both transmission and reflection configurations has been employed to understand the THz radiation property surface properties of tungsten disulfide ($\mathrm{W}{\mathrm{S}}_{2}$). We observed only one polarization under different pump beam a saturation effect with increasing power. The results are from that $\mathrm{Mo}{\mathrm{S}}_{2}$ based on optical rectification spite similar physical optoelectronic them. nonlinear coefficient...
We propose a switchable broadband and wide-angular terahertz asymmetric transmission based on spiral metasurface composed of metal VO2 hybrid structures. Results show that reaching up to 15% can be switched or off for circularly polarized waves when the phase transits from insulting state conducting reversely. Strikingly, we find relatively high above 10% maintained over broad bandwidth 2.6-4.0 THz also large incident angular range 0°-45°. further discover as angle increases, dominant...
Van der Waals heterostructures have great potential for the emerging self-powered photoelectrochemical photodetectors due to their outstanding photoelectric conversion capability and efficient interfacial carrier transportation. By considering band alignment, structural design, growth optimization, of vertically oriented SnS2 with different densities on MoS2 nanosheets are designed fabricated using a two-step epitaxial method. Compared SnS2, MoS2, low density-vertical SnS2/MoS2...
The demand for ultrafast and multifunctional all-optical modulators based on two-dimensional nonlinear optical materials is continuously growing in the era of big data artificial intelligence. Herein, we report experimental realization first, to best our knowledge, bipolar modulator that pump intensity-dependent absorption Ti 3 C 2 T x MXene. This tunable with a conversion threshold approximately 65 GW/cm characterized analyzed by Z-scan technology, MXene shows stronger coefficient 10 cm/GW...
Limited evidence exists on stroke incidence and its impact dementia risk in Asian American older adults, a population with lower than other racial ethnic groups. We aimed to estimate the cumulative of assess effect over 10 years among Chinese, Filipino, Japanese, South Asian, non-Latino White adults Northern California. This cohort study included Kaiser Permanente California members who participated surveys between 2002 2009 linked electronic health record data through 2020. participants...
Seagrass meadows play a crucial ecological role, with Nanozostera japonica being the most widely distributed seagrass species in China. However, it faces severe degradation. In Yellow River Delta, Shandong, China, largest N. meadow once existed. Invasive Spartina alterniflora has encroached upon habitats. UAV (unmanned aerial vehicle) tracking from 2015 to 2019 revealed 516-fold increase distribution area of S. within study region. Between April and July 2019, advanced 14 meters into areas,...