A5003321212- Laser Material Processing Techniques
- Nonlinear Optical Materials Studies
- Optical Coatings and Gratings
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Advanced Surface Polishing Techniques
- Photonic Crystals and Applications
- Optical Coherence Tomography Applications
- Surface Modification and Superhydrophobicity
- Advanced Sensor and Energy Harvesting Materials
- Near-Field Optical Microscopy
- Microfluidic and Bio-sensing Technologies
- Laser-induced spectroscopy and plasma
- Nanofabrication and Lithography Techniques
- Electrohydrodynamics and Fluid Dynamics
- Ocular and Laser Science Research
- Orbital Angular Momentum in Optics
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Surface Roughness and Optical Measurements
- Adhesion, Friction, and Surface Interactions
- Conducting polymers and applications
- Digital Holography and Microscopy
- Cultural Heritage Materials Analysis
- Micro and Nano Robotics
Jilin University
2015-2024
State Key Laboratory on Integrated Optoelectronics
2014-2024
University of Southampton
2019-2024
University of Science and Technology of China
2024
Hefei National Center for Physical Sciences at Nanoscale
2024
Jilin Medical University
2012-2021
Jilin Province Science and Technology Department
2018
Nankai University
2003
Polarization and geometric phase shaping via a space-variant anisotropy has attracted considerable interest for fabrication of flat optical elements generation vector beams with applications in various areas science technology. Among the methods patterning, imprinting self-assembled nanograting structures silica glass by femtosecond laser writing is promising birefringent optics high thermal chemical durability damage threshold. However, drawback loss due to light scattering structures,...
Abstract Nanoscale surface texturing, drilling, cutting, and spatial sculpturing, which are essential for applications, including thin-film solar cells, photonic chips, antireflection, wettability, friction drag reduction, require not only high accuracy in material processing, but also the capability of manufacturing an atmospheric environment. Widely used focused ion beam (FIB) technology offers nanoscale precision, is limited by vacuum-working conditions; therefore, it applicable to...
Abstract The demand for energy efficient data storage technologies with high capacity and long life span is increasingly growing due to the explosion of digital information in modern society. Here, a 5D optical ultralong lifetime realized by femtosecond‐laser‐induced anisotropic nanopore structures (type X modification) silica glass. ultrahigh transmission this birefringent modification, >99% visible range, allows recording retrieving thousands layers multibit practically. Type formation...
Abstract Flexible smart surfaces with tunable wettability are promising for emerging wearable uses. However, currently, superhydrophobic dynamic wetting behaviors rarely reported. Here, a skin‐like elastomer surface switchable lotus leaf and rose petal states is Direct laser writing technique employed one‐step, programmable, large‐scale fabrication of monolithic hierarchical micro‐nanostructures on elastomer, leading to strong water repellence. The topography can be finely regulated in rapid...
Abstract Femtosecond laser machining has been widely used for fabricating arbitrary 2.5 dimensional (2.5D) structures. However, it suffers from the problems of low fabrication efficiency and high surface roughness when processing hard materials. To solve these problems, we propose a dry‐etching‐assisted femtosecond (DE‐FsLM) approach in this paper. The could be significantly improved formation complicated 2.5D structures, as power required modification materials is lower than that ablation....
Abstract Photosensitivity in nature is commonly associated with stronger light absorption. It also believed that artificial optical anisotropy to be the strongest when created by linear polarization. Contrary intuition, ultrafast laser direct writing elliptical polarization silica glass, while nonlinear absorption about 2.5 times weaker, results form birefringence twice of linearly polarized light. Moreover, a larger concentration anisotropic nanopores elliptically pulses observed. The...
It is challenging to store the exponentially increasing amount of data in information age. The multiplexed optical storage with merits high density (hundreds terabytes/disk), low energy consumption, and long lifetime could open a new era technology. recent progress five-dimensional (5D) based on anisotropic nanostructures written by femtosecond (fs) laser pulses transparent materials reveals its potential for real-world applications, but writing speed remain major challenge. Here, we propose...
Herein, we report a facile approach for the maskless production of subwavelength-structured antireflective surfaces on sapphire with high and broadband transmittance in mid-IR: femtosecond laser direct writing assist wet etching. With this method, inverted pyramid cone arrays pitch about 2 μm total height near 900 nm were produced. The resulting subwavelength structures greatly suppress specular reflection at normal incidence. transmission measurements between 3 5 are agreement simulations...
Here, we report a sapphire-based Fresnel zone plate (FZP), which is fabricated by femtosecond laser direct writing assisted with subsequent wet etching. With this method, solved the problem of high surface roughness caused ultrafast processing. We have obtained ~12-nm average smaller than 1/25 optical working wavelength. As-formed sapphire FZP also exhibited well-defined geometry. More importantly, ultraviolet (UV) light focusing and imaging can be easily achieved. Due to material hardness,...
Lithium niobate (LN) crystal plays important roles in future integrated photonics, but it is still a great challenge to efficiently fabricate three-dimensional micro-/nanostructures on it. Here, femtosecond laser direct writing-assisted liquid back-etching technology (FsLDW-LBE) proposed achieve the (3D) microfabrication of lithium with high surface quality (Ra = 0.422 nm). Various 3D structures, such as snowflakes, graphic arrays, criss-cross and helix have been successfully fabricated LN...
Luminescent upconversion (UC) is a promising way to harvest near-infrared (NIR) sunlight and improve the power conversion efficiency (PCE) of solar cells. However, most efficient phosphors (UCPs) are based on 4f–4f transitions rare earth (RE) ions, which have only narrower excitation band matching with sun spectrum. To solve this significant problem, we designed fabricated novel kind UC nanocomposites, Yb2O3/Au, in luminescence (UCL) Yb2O3 was white broad that originated from electron–hole...
We report a novel microlens array with different curvature unit lenses (MLADC) fabricated femtosecond laser direct writing technology. The MLADC consisted of hexagonal hyperboloid microlenses, which have heights and curvatures from others. unique optical performance imaging focusing capability were demonstrated. An object was imaged at positions the by lenses, as ability adjusting image plane for overall MLADC. In addition, experiment had good agreement simulation results, based on analysis...
Abstract Fine-tuning the physical and chemical properties of graphene its derivatives is crucial for developing novel multi-functional graphene-based devices. Natural bio-surfaces with rich micro-nanostructures are inspirational such schemes since they possess unique as superhydrophobicity. In order to effectively acquire these bio-functions, graphene-related materials need be structured into regularly arranged biomimetic structures. Laser-processing techniques, two beam laser interference...
We systematically studied femtosecond laser-inscribed self-organized nanogratings and geometric phase elements such as a polarization diffraction focusing lens Q-plate in sapphire crystal. Besides the void structures observed focus, with periods of 150~300 nm were observed, depending on nanoslit that took role seeding effect by localized light field enhancement. The non-polarized refractive index change birefringence measured values around <mml:math...
The demand for fast optical image acquisition without movable elements (e.g., self-driving car technology) can be met using bioinspired 3D compound eyes.3D laser processing strategies enable designable structuring but suffer from low fabrication efficiency, which significantly limits their applications in producing complex devices.Herein, we demonstrate a versatile yet simple wet-etching-assisted holographic method the development of eyes.Artificial μeyes readily fabricated by programming...
The pH effect and H/D kinetic isotope (KIE) of formic acid oxidation reaction (FAOR) on Pd(111) have been systematically investigated by cyclic voltammetry. In addition, the acetate adsorption is also studied to a deep understanding role adsorbates during FAOR process. results clearly show: (1) solutions with fixed concentration acetic acid, onset potential desorption almost unchanged reversible hydrogen electrode (RHE) scale increase when lower than pKa acid. However, higher shifts...
Abstract The dry mass and the orientation of biomolecules can be imaged without a label by measuring their permittivity tensor (PT), which describes how affect phase polarization light. Three-dimensional (3D) imaging PT has been challenging. We present label-free computational microscopy technique, (PTI), for 3D measurement PT. PTI encodes invisible into images using oblique illumination, polarization-sensitive detection volumetric sampling. is decoded from data with vectorial model...
Biomimetic hierarchical structures are an important branch among bio-inspired materials. These responsible for rich physical and chemical phenomena. In this paper, we briefly reviewed facile methods to fabricate large-area biomimetic via laser processing. One is based on femtosecond direct writing, the other two-beam interference lithography. details, first method ablation ZnS thin films writing combined with a phase mask. The second multi-exposure lithography by photoresist varied exposure...