A5001572397- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- 2D Materials and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanowire Synthesis and Applications
- Graphene research and applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Advanced Antenna and Metasurface Technologies
- ZnO doping and properties
- Advanced Sensor and Energy Harvesting Materials
- Antenna Design and Analysis
- Advanced Semiconductor Detectors and Materials
- Conducting polymers and applications
- Optical Coatings and Gratings
- Organic Electronics and Photovoltaics
- Force Microscopy Techniques and Applications
- Nanomaterials and Printing Technologies
- Thermal Radiation and Cooling Technologies
- Gas Sensing Nanomaterials and Sensors
- Chalcogenide Semiconductor Thin Films
- Advanced Optical Sensing Technologies
- Advanced optical system design
Chongqing Institute of Green and Intelligent Technology
2016-2025
University of Chinese Academy of Sciences
2017-2025
Chongqing University of Posts and Telecommunications
2025
Chinese Academy of Sciences
2007-2021
Chongqing University
2018-2021
The University of Melbourne
2012-2019
Institute of Optics and Electronics, Chinese Academy of Sciences
2008-2010
Metasurfaces with actively tunable features are highly demanded for advanced applications in electronic and electromagnetic systems. However, realizing independent dual-tunability remains challenging requires more efforts. In this paper, we present an active metasurface where the magnitude frequency of resonant absorption can be continuously independently tuned through application voltage biases. Such a is accomplished at microwave frequencies by combining varactor-loaded high-impedance...
The spring constant of an atomic force microscope cantilever is often needed for quantitative measurements. calibration method Sader et al. [Rev. Sci. Instrum. 70, 3967 (1999)]10.1063/1.1150021 a rectangular requires measurement the resonant frequency and quality factor in fluid (typically air), knowledge its plan view dimensions. This intrinsically uses hydrodynamic function geometry. Here, we present functions series irregular non-rectangular cantilevers that are commonly used practice....
The lifetime and power conversion efficiency are the key issues for commercialization of perovskite solar cells (PSCs). In this paper, development 2D/3D hybrids (CA2PbI4/MAPbIxCl3-x) was firstly demonstrated to be a reliable method combine their advantages, provided new concept achieving both stable efficient PSCs through hybridization perovskites. afforded significantly-improved moisture stability films devices without encapsulation in high humidity 63 ± 5%, as compared with 3D...
A simple heterovalent metal halide surface treatment enables formation of n/n<sup>+</sup> perovskite homojunction, which enlarged built-in electric field and accelerated charge extraction at the perovskite/C<sub>60</sub> interface, achieving a high efficiency 22.2%.
The photogating effect in hybrid structures has manifested itself as a reliable and promising approach for photodetectors with ultrahigh responsivity. A crucial factor of the is built-in potential at interface, which controls separation harvesting photogenerated carriers. So far, primary efforts designing rely on discovering different materials developing multilayer structures, may raise problems compatibility standard semiconductor production line. Here, we report an enhanced monolayer...
Abstract High quantum efficiency and wide-band detection capability are the major thrusts of infrared sensing technology. However, bulk materials with high have consistently encountered challenges in integration operational complexity. Meanwhile, two-dimensional (2D) semimetal unique zero-bandgap structures constrained by bottleneck intrinsic efficiency. Here, we report a near-mid ultra-miniaturized graphene photodetector configurable 2D potential well. The well constructed dielectric can...
Serving as the "eyes" and "ears" of Internet Things, optical acoustic sensors are fundamental components in hardware systems. Nowadays, mainstream systems, often comprising numerous discrete sensors, conversion modules, processing units, tend to result complex architectures that less efficient compared human sensory pathways. Here, a visual-audio photodetector inspired by perception system is proposed enable all-in-one visual signal detection with computing capability. This device not only...
Fabrication of nanostructured graphene (Gr) for gas sensing applications has become increasingly attractive. For the first time, 3D flowers (GF) cluster patterns are grown directly on an Ni foam substrate by inexpensive homebuilt microwave plasma‐enhanced chemical vapor deposition (MPCVD) using mixture H 2 /C 4 O @Ar as a precursor. The interim morphologies synthesized GF investigated and growth mechanism film is proposed. decomposed to few‐layer Gr sheets ultrasonication in ethanol....
Abstract The recent development of metasurfaces offers a unique technique for the arbitrary control electromagnetic waves by spatially manipulating their amplitudes and phases. However, real time in typically depends solely on dynamical phase modulation, but lacks amplitude modulation. In this paper, modulation is tried to combine with coding metasurface, manipulation scattering at microwave frequencies. Such an active metasurface achieved placing patterned graphene layer binary metallic...
We propose and experimentally demonstrate the operation of an electrically tunable, broadband coherent perfect absorption (CPA) at microwave frequencies by harnessing CPA features a graphene–electrolyte–graphene sandwich structure (GSS). Using both simplified lumped circuit model full-wave numerical simulation, it is found that absorptivity GSS can be tuned dynamically from nearly 50% to 100% changing Fermi level graphene. Strikingly, our agrees very well with model, offering valuable...
Photodetectors based on two-dimensional (2D) materials such as monolayer MoS2 are attractive because they can be directly integrated into the current metal-oxide semiconductor (CMOS) structures. Unfortunately, devices suffer from low responsivity due to absorption by MoS2. Combining with plasmonic nanostructures is an alternative solution for enhancing of 2D semiconductor, and this drastically increase photoresponsivity corresponding photodetector. Herein, a device incorporating...
Abstract Optimization of the back contact interface is crucial for improving performance Cu 2 ZnSnS 4 (CZTS) thin film solar cells. In this paper, self‐depleted CuSCN deployed as an intermediate layer at Mo/CZTS to improve quality contact. This layer, obtained via aqueous solution processing, reduces thickness Mo(S,Se) and eliminates multi‐layer crystallization absorber by suppressing undesirable reaction between Mo Se during selenization process. By regulating selenium infiltration into...
Internal photoemission is a prominent branch of the photoelectric effect and has emerged as viable method for detecting photons with energies below semiconductor bandgap. This breakthrough played significant role in accelerating development infrared imaging one chip state-of-the-art silicon techniques. However, performance these Schottky detectors currently hindered by limit internal photoemission; specifically, low barrier height inevitable detection low-energy photons. Herein, distinct...
Colloidal gold nanorods were aligned end-to-end via dithiol coupling. The scattering properties of the resultant nanostructures investigated at single particle level by combining dark-field microscopy and high resolution scanning electron microscopy. longitudinal surface plasmon resonance coupled Au exhibited a red-shift as number rods in chain increased. polarization-dependent optical properties, due to selective excitation collective bonding anti-bonding modes. peak energy was not strongly...
Schottky heterojunctions based on graphene–silicon structures are promising for high-performance photodetectors. However, existing fabrication processes adopt transferred graphene as electrodes, limiting process compatibility and generating pollution because of the metal catalyst. In this report, photodetectors fabricated using directly grown nanowalls (GNWs) electrodes. Due to metal-free growth process, GNWs–Si with an ultralow measured current noise 3.1 fA Hz−1/2 obtained, as-prepared...
We report the electrodeposition of metallic silver onto gold nanostars adsorbed to ITO electrodes. The electrochemical process was studied at single particle level by correlated in situ dark field spectroscopy and scanning electron microscopy (SEM). Underpotential deposition avoids bulk formation on substrates. SEM proves that occurs all surfaces when polyvinylpyrrolidone (PVP) is stabilizing or preferentially nanostar tips ligand removed. surface plasmon resonance blue-shifts more than 100...
The spin Hall effect of light (SHEL) has been widely studied for manipulating spin-polarized photons. In this Letter, we present a mechanism to tune the shift SHEL electrically at 1550 nm by means introducing graphene layer. is quite sensitive layer near Brewster angle horizontal polarization incidence and can be dynamically tuned varying Fermi energy graphene. We find that position value are decided real imaginary parts conductivity, respectively. addition, two different regions have...
High-performance transparent and flexible triboelectric nanogenerators (TENGs) based on graphene composite electrodes via surface engineering are proposed demonstrated. Through modifying the CVD-grown with conductive polymer poly(3,4-ethylenedioxy-thiophene):polystyrenesulfonate (PEDOT:PSS), excellent optoelectronic performances were fabricated, which exhibited a high transmittance up to 83.5% sheet resistance of 85 Ω/□, decreasing from initial value 725 Ω/□. As consequence, output current...
Two-dimensional molybdenum disulfide (MoS2) is a promising material for ultrasensitive photodetectors owing to its tunable band gap and high absorption coefficient. However, controlled synthesis of high-quality, large-area monolayer still challenge in practical application. In this work, we report gold foil assistant chemical vapor deposition method the large-size (>400 μm) single-crystal MoS2 film on silicon dioxide (SiO2) substrate. The influence Au enlarging size investigated systemically...
A reliable and reproducible method to rapidly charge single gold nanocrystals in a solid-state device is reported. Gold nanorods (Au NRs) were integrated into an ion gel capacitor, enabling them be charged transparent highly capacitive device, ideal for optical transmission. Changes the electron concentration of Au NR observed with dark-field imaging spectroscopy via localized surface plasmon resonance (LSPR) shifts scattering spectrum. time-resolved, laser-illuminated, system was developed...