A5075794765- Force Microscopy Techniques and Applications
- Antenna Design and Analysis
- Electronic and Structural Properties of Oxides
- Metamaterials and Metasurfaces Applications
- Semiconductor materials and devices
- Advanced Antenna and Metasurface Technologies
- Mechanical and Optical Resonators
- Analytical Chemistry and Sensors
- Photonic and Optical Devices
- Metal Extraction and Bioleaching
- Ferroelectric and Piezoelectric Materials
- Mine drainage and remediation techniques
- Surface and Thin Film Phenomena
- Near-Field Optical Microscopy
- Neural Networks and Reservoir Computing
- Ferroelectric and Negative Capacitance Devices
- Optical Network Technologies
- Carbon Nanotubes in Composites
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Full-Duplex Wireless Communications
- Domain Adaptation and Few-Shot Learning
- Adversarial Robustness in Machine Learning
- Anomaly Detection Techniques and Applications
- Molecular Junctions and Nanostructures
China Mobile (China)
2016-2025
National University of Singapore
2021-2024
Southeast University
2019-2024
Nantong University
2024
Inner Mongolia University
2021-2023
Shandong University of Science and Technology
2022-2023
China Electronics Technology Group Corporation
2022
Nanjing Normal University
2019-2022
State Key Laboratory of Millimeter Waves
2021-2022
Anhui Normal University
2022
Metasurfaces are artificially engineered ultrathin structures that can finely tailor and control electromagnetic wavefronts. There is currently a strong interest in exploring their capability to lift some fundamental limitations dictated by Lorentz reciprocity, which have implications communication, heat management, energy harvesting. Time-varying approaches emerged as attractive alternatives conventional schemes relying on magnetic or nonlinear materials, but experimental evidence limited...
Abstract Photoemission electron microscopy (PEEM) excited by X‐ray and UV sources is used to investigate epitaxial anatase thin films with embedded rutile nanocrystals, a model system for the study of heterocatalysis on mixed‐phase TiO 2 . Both excitation show distinct contrast between two phases; however, reversed. Rutile nanocrystals appear darker than film in PEEM images but brighter UV‐PEEM images. We observe that topography‐induced dominant imaging, whereas work function...
Recently, digital coding metasurfaces have attracted significant attention due to their capability dynamically control electromagnetic waves in programmable ways. When the bit of a metasurface is higher, its controlling will be stronger. However, it extremely difficult realize 3-bit and higher since an <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$n$ </tex-math></inline-formula> -bit element require many...
Conventional wireless communication schemes indiscriminately transmit information into the whole space and pose inherent security risks. Recently, directional modulation (DIM) has attracted enormous attention as a promising technology. DIM generates correct constellation symbols in desired directions distorts them undesired directions, thus ensuring of transmitted information. Although several have been reported, they suffer from defects bulkiness, energy consumption, high cost, inability to...
A current detection scanning probe technique is developed that quantifies frequency-dependent local transport properties. The approach, referred to as nanoimpedance microscopy/spectroscopy (NIM), based on impedance spectroscopy with a conductive atomic force microscopy (AFM) tip. NIM applied study the quality of tip/surface contact and behavior individual grains grain boundaries in polycrystalline ZnO. Impedance spectra were measured frequency range 40 Hz 110 MHz, boundary properties are...
A novel approach to fabricating multicomponent nanostructures is demonstrated. Atomic polarization in ferroelectric perovskites manipulated control electronic structure and local chemical reactivity (see Figure). Several paradigms for domain patterning are presented. Complex structures consisting of semiconductors, metals, functional organic/biological molecules produced.
We report a series of new surface reconstructions on ${\mathrm{BaTiO}}_{3}(001)$ as function environmental conditions, determined via scanning tunneling microscopy and low energy electron diffraction. Using density functional theory calculations thermodynamic modeling, we construct phase diagram determine the atomic structures thermodynamically stable phases. Excellent agreement is found between predicted experiment. The results enable prediction properties under entire range accessible conditions.
One of the pressing issues for optical neural networks (ONNs) is performance degradation introduced by parameter uncertainties in practical components. Hereby, we propose a novel two-step ex situ training scheme to configure phase shifts Mach–Zehnder-interferometer-based feedforward ONN, where stochastic gradient descent algorithm followed genetic considering four types imprecisions employed. By doing so, learning process features fast convergence and high computational efficiency, trained...
Development of an efficient detection method to monitor residual mycotoxins in food is very important ensure safety, but the complex matrix seriously affects sensitivity and accuracy. Here, using a three-dimensional ordered macroporous magnetic inverse photonic crystal microsphere (MPCM) as supporting material, molecularly imprinted polymer (MIP) that can selectively recognize aflatoxin B1 (AFB1) was synthesized through dummy template imprinting strategy. The MPCM@MIP prepared by employing...
Acid mine drainage (AMD) environments are one of the most extreme ecosystems on earth, and their biogeochemical cycling has been widely studied. However, carbon underlying microbial interactions with dissolved organic matter (DOM) is poorly understood in these environments. Here, we evaluated relationships between populations DOM pools an AMD lake by combining high-throughput chemical compositional analyses. The results demonstrated that microalgae were predominant primary producers system...
In the last two decades, scanning probe microscopies (SPMs) have become primary tool for addressing structure and electronic, mechanical, optical, transport phenomena on nanometer atomic scales. Here, we summarize basic principles of SPM as applied oxide materials characterization present recent advances in high‐resolution imaging local property measurements. The use advanced techniques solutions material related problems is illustrated examples grain boundary polycrystalline oxides...
We present a low-cost and high-performance 5-bit programmable phased array antenna at Ku-band, which consists of 1-bit reconfigurable radiation structures, digital phase shifters, coplanar waveguide feeding network.The structure utilizes symmetric geometries PIN diodes to form stable 180 • difference.The shifter provides 168.75 difference together with the 348.75 coverage.The operates between 14.4 15.4 GHz, overall contains 24 × 2 elements each them being individually addressable.By changing...
We report the back-end-of-line (BEOL)-compatible 3-D oxide semiconductor (OS) fin-gate ferroelectric field-effect transistors (Fe-FETs) featuring atomic layer deposition (ALD)-grown zinc (ZnO) channel and Zr-doped HfO2 (HZO) dielectric. Both ZnO HZO are able to conformally cover fin-shaped tungsten (W) metal gate with uniform thickness on all surfaces. With optimization of ALD for growth film extensive gate-stack engineering, our Fe-FETs show excellent electrical characteristics, including...
Abstract We present a novel X-band 1-bit reconfigurable transmitarray with excellent polarization conversion. The basic element consists of two layers metal patterns connected by through-hole and feed structures. top layer is used to realize phase response controlling the states PIN diodes; bottom composed rectangular patch U-slot conversion from linear cross polarization. agreement between simulation measurement results indicates that when diode are switched in turn, this unit achieves...
In 5G/B5G communication systems, network slicing is utilized to tackle the problem of allocation resources for diverse services with changing demands. We proposed an algorithm that prioritizes characteristic requirements two different and tackles scheduling in hybrid system eMBB URLLC. Firstly, resource are modeled, subject rate delay constraints both services. Secondly, purpose adopting a dueling deep Q (Dueling DQN) approach formulated non-convex optimization innovatively, which mechanism...
The surface potential of a multidomain BaTiO3 (001) was imaged in the presence and absence ultraviolet (UV) illumination. UV radiation induces decrease contrast between c+ c− domains with time constant few seconds due to redistribution photocarriers screening. A slower process recovery observed after In addition, scanning conducting atomic force microscopy tip contact under illumination destabilizes some ferroelectric domains.