A5100326643- Near-Field Optical Microscopy
- Advanced Fluorescence Microscopy Techniques
- Advanced Optical Sensing Technologies
- Photoacoustic and Ultrasonic Imaging
- Digital Holography and Microscopy
- Image Processing Techniques and Applications
- Optical measurement and interference techniques
- Advanced Image Processing Techniques
- Laser Material Processing Techniques
- Metamaterials and Metasurfaces Applications
- Advanced Image and Video Retrieval Techniques
- Optical Coherence Tomography Applications
- Advanced Steganography and Watermarking Techniques
- Image and Video Stabilization
- Video Surveillance and Tracking Methods
- Image Enhancement Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Microstructure and mechanical properties
- Orbital Angular Momentum in Optics
- Force Microscopy Techniques and Applications
- Advanced Vision and Imaging
- Image Retrieval and Classification Techniques
- Optical Systems and Laser Technology
- Thermal Radiation and Cooling Technologies
- Advanced Antenna and Metasurface Technologies
Harbin Institute of Technology
2013-2024
Shenyang Ligong University
2023-2024
Tsinghua University
2021-2024
Nanyang Technological University
2024
Southeast University
2023
Queen Mary University of London
2023
China University of Petroleum, East China
2022-2023
Southwest Jiaotong University
2023
Iowa State University
2008-2022
Zhengzhou Fruit Research Institute
2022
Abstract Computational meta-optics brings a twist on the accelerating hardware with benefits of ultrafast speed, ultra-low power consumption, and parallel information processing in versatile applications. Recent advent metasurfaces have enabled full manipulation electromagnetic waves within subwavelength scales, promising multifunctional, high-throughput, compact flat optical processors. In this trend, nonlocality or multi-layer structures are proposed to perform analog computations based...
Differential interference contrast (DIC) microscopy allows high-contrast, low-phototoxicity, and label-free imaging of transparent biological objects, has been applied in the field cellular morphology, cell segmentation, particle tracking, optical measurement others. Commercial DIC based on Nomarski or Wollaston prism resorts to two polarized waves with a lateral differential offset (shear) axial phase shift (bias). However, shear generated by these prisms is limited rectilinear direction,...
Rigorously designed sub-micrometer structure arrays are widely used in metasurfaces for light modulation. One of the glaring restrictions is unavailability easily accessible fabrication methods to efficiently produce large-area and freely with nanoscale resolution. We develop a patterned pulse laser lithography (PPLL) approach create sub-wavelength feature resolution periods from less than 1 μm over 15 on thin films substrates under ambient conditions. Separated ultrafast pulses wavefront by...
In fluorescence microscopy, computational algorithms have been developed to suppress noise, enhance contrast, and even enable super-resolution (SR). However, the local quality of images may vary on multiple scales, these differences can lead misconceptions. Current mapping methods fail finely estimate quality, challenging associate SR scale content. Here, we develop a rolling Fourier ring correlation (rFRC) method evaluate reconstruction uncertainties down scale. To visually pinpoint regions...
The aim of this study is to acquire information for future breeding efforts aimed at improving fruit quality via effects on aroma by comparing the diversity Chinese local peach cultivars across 10 samples three varieties (honey peach, yellow and flat peach). volatile components fruits were analyzed identified gas chromatography-ion mobility spectrometry (GC-IMS) combined with chromatography-mass (GC-MS), main flavor determined relative odor activity value (ROAV) principal component analysis...
Three-dimensional (3D) imaging enables high-precision and high-resolution axial positioning, which is crucial for biological imaging, semiconductor defect monitoring, other applications. Conventional implementations rely on bulky optical elements or scanning mechanisms, resulting in low speed complicated setups. Here, we generate the double-helix (DH) point spread function with an all-dielectric metasurface thus innovate 3D microscope (hence dubbed meta-microscope), both 4f 2f systems. The...
Deoxynivalenol (DON)and zearalenone (ZEN) pose a serious threat to human health, and have been frequently detected in the aqueous environment. To protect consumers from harm of mycotoxins, nanoenzyme-mediated multiplexed lateral flow immunoassay (LFIA) integrated with smartphone was developed for rapid, highly sensitive simultaneous quantitative detection DON ZEN High catalytic activity nanoenzyme used as signal amplification improve sensitivity detection, while smartphone-based device could...
An extremely focused optical field down to sub-10 nm in an apertureless near-field scanning microscope has been used widely surface nanostructuring and structure characterization. The involved heating not characterized quantitatively due the small region. In this work, we present first noncontact thermal probing of silicon under nanotip laser at a scale. A more than 200 °C temperature rise is observed incident 1.2 × 10(7) W/m(2), while polarization well aligned with tip axis. To explore...
Abstract Designed metasurfaces, composed of a two-dimensional array meta-atoms, provide an alternative approach to achieving efficient electromagnetic wave manipulation. Metasurface holography is emerging and promising imaging technology, with improved image quality spatial resolution compared traditional holography. Many devices are fabricated only by coding specific phase responses the designed metasurfaces. However, modulation both amplitude waves can significantly improve holographic...
Constructing flexible regular-shaped range-intensity profiles by the convolution of illuminator laser pulse and sensor gate is crucial for 3D super-resolution range-gated imaging. However, ns-scale rectangular-shaped with tunable width difficult to be obtained, especially pulsed solid-stated lasers. In this paper we propose a multi-pulse time delay integration (MPTDI) method reshape (RIP) free from above limitation An equivalent temporal shaping model established evaluate optimize MPTDI...
In this work, large-scale molecular dynamics simulations are conducted to explore the thermal and mechanical phenomena in surface nanostructuring with a laser-assisted scanning tunnelling microscope. Employing super parallel computer, more than 200 million atoms modelled provide substantial details about how localized perturbations result nanostructures. Extremely stress accumulation beneath sample leads an explosion of melted/vaporized material, leaving nanoscale hole surface. Normal shear...
A new kind of blue phase (BP) liquid crystal (LC) films which could reflect both right- and left-circularly polarized light photo- thermal switching performance has been demonstrated.
Abstract Large‐scale nanopatterning at low cost and high throughput is crucial to the practical applications of metasurfaces. Phase‐change materials equipped in these metasurfaces as modulation layers or resonators are generally applied achieve a tunable function have attracted significant attention. Here, an efficient method developed by combining ultrafast laser localized modification/ablation subsequent etching fabricate nanostructures on phase‐change material, Ge 2 Sb Te 5 (GST), over...
We report on a systematic study of highly enhanced optical field and its induced thermal transport in nanotips under laser irradiation. The effects electric distribution caused by curvature radius, tip aspect ratio, polarization angle the incident are studied. Our Poynting vectors' clearly shows that when interacts with metal tip, it is bent around concentrated apex, where extremely high enhancement appears. This phenomenon more like liquid flow being forced/squeezed to go through narrow...
Steady-state fluorence imaging and time-resolved fluorescence are two important areas in research. Fluorescence lifetime is an absolute measurement method which independent of excitation laser intensity, fluorophore concentration, photobleaching compared to intensity techniques. Time-gated microscopy (FLIM) can provide high resolution frame during mature FLIM methods. An abstract time-gated model was given, temporal parameters shown as well. Aiming at different applications steady transient...
Micro/nanoparticle induced near-field laser ultra-focusing and heating has been widely used in laser-assisted nanopatterning nanolithography to pattern nanoscale features on a large-area substrate. Knowledge of the temperature stress region is critical for process control optimization. At present, probing temperature, stress, optical fields remains great challenge since area very small (∼100 nm or less) not immediately accessible sensing. In this work, we report first experimental study...
Three-dimensional range-gated imaging is a new 3D sensing technique with higher resolution than flash LIDAR, and has great potential in realizing high-resolution real-time to satisfy land surface remote applications. In this paper, three existing approaches of LIDAR are introduced including their advantages disadvantages. Among them, the two methods gain modulation range-intensity correlation can reconstruct scene from gate images, which enable imaging. We propose superresolution based on...