A5043148325- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Laser Material Processing Techniques
- Nonlinear Optical Materials Studies
- Solid State Laser Technologies
- Photoacoustic and Ultrasonic Imaging
- Optical Coherence Tomography Applications
- Luminescence Properties of Advanced Materials
- Mass Spectrometry Techniques and Applications
- Advanced Fluorescence Microscopy Techniques
- Spectroscopy and Quantum Chemical Studies
- Laser-induced spectroscopy and plasma
- Spectroscopy Techniques in Biomedical and Chemical Research
- Random lasers and scattering media
- Glass properties and applications
- Retinal Diseases and Treatments
- Advanced Chemical Physics Studies
- Quantum optics and atomic interactions
- Terahertz technology and applications
- Glaucoma and retinal disorders
- Ocular and Laser Science Research
- Digital Holography and Microscopy
- Gold and Silver Nanoparticles Synthesis and Applications
- Photonic Crystals and Applications
East China Normal University
2016-2025
Shandong Normal University
2020-2025
Shanxi University
2016-2025
Zhejiang Provincial People's Hospital
2022-2025
Chinese University of Hong Kong
2022-2025
Hangzhou Medical College
2022-2025
Zhejiang Lab
2025
Chinese Academy of Geological Sciences
2024
Shanxi University of Traditional Chinese Medicine
2022-2024
Prince of Wales Hospital
2023
Femtosecond laser-induced periodic surface structures (LIPSS) have been extensively studied over the past few decades. In particular, period and groove width of high-spatial-frequency LIPSS (HSFL) is much smaller than diffraction limit, making it a useful method for efficient nanomanufacturing. However, compared with low-spatial-frequency (LSFL), structure size HSFL smaller, more easily submerged. Therefore, formation mechanism complex has always research hotspot in this field. study,...
All the optical properties of materials are derived from dielectric function. In spectral region where permittivity approaches zero, known as epsilon-near-zero (ENZ) region, propagating light within material attains a very high phase velocity, and meanwhile exhibits strong nonlinearity. The interplay between linear nonlinear response in these thus offers unprecedented pathways for all-optical control device design. Here authors demonstrate ultrafast modulation based on typical ENZ indium tin...
Field effect relies on the nonlinear current-voltage relation in semiconductors; analogously, materials that respond nonlinearly to an optical field can be utilized for modulation. For instance, (NLO) bearing a saturable absorption (SA) feature on-off switching behavior at critical pumping power, thus enabling ultrafast laser pulse generation with high peak power. SA has been observed diverse preferably its nanoscale form, including both gaped semiconductor nanostructures and gapless like...
Over the past two decades, femtosecond laser-induced periodic structures (femtosecond-LIPSs) have become ubiquitous in a variety of materials, including metals, semiconductors, dielectrics, and polymers. Femtosecond-LIPSs useful laser processing method, with broad prospects adjusting material properties such as structural color, data storage, light absorption, luminescence. This review discusses formation mechanism LIPSs, specifically LIPS processes based on pump-probe imaging method. The...
Femtosecond laser-induced periodic surface structures (LIPSS) have several applications in structuring and functionalization. Three major challenges exist the fabrication of regular uniform LIPSS: enhancing energy deposition, reducing residual heat, avoiding deposited debris. Herein, we fabricate an extremely low-spatial-frequency LIPSS (LSFL) on a silicon by temporally shaped femtosecond laser. Based <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1">...
The globally prevalent rotator cuff tear has a high re-rupture rate, attributing to the failure reproduce interfacial fibrocartilaginous enthesis. Herein, hierarchically organized membrane is developed that mimics heterogeneous anatomy and properties of natural enthesis finely facilitates reconstruction tendon-bone interface. A biphasic consisting microporous layer mineralized fibrous constructed through non-solvent induced phase separation (NIPS) strategy followed by co-axial...
In this paper, we report the formation of long-periodic (LP) ripples with a period 530–600 nm and short-periodic (SP) 260–320 on stainless steel irradiated by 800 femtosecond laser pulses. The split LP plays decisive role in SP ripples. We further conduct pump-probe experiments numerical simulations to study ultrafast dynamics surface periodic
Exciton binding energies of six polythiophene-derived polymers were studied through using a nonempirical, optimally tuned range-separated (RS) functional combining with the polarizable continuum model (PCM). We demonstrate that this approach predicts ionization (IE), electron affinities (EA), transport gaps, optical and exciton different polymer chains in both vacuum solid (dielectric medium) accuracy comparable to many-body perturbation theory within GW approximation Bethe–Salpeter equation...
Femtosecond laser fabrication outperforms the traditional techniques with high precision, efficiency, low collateral damage and wide applicability, which has shown to be a powerful tool in precision machining. Imaging ultrafast dynamics of femtosecond is necessary for understanding processing mechanism establishing corresponding physical models. Up now, measurement based on pump–probe strategy are most used methods. However, they limited by energy stability materials surface uniformity, have...
Bone grafting is frequently conducted to treat bone defects caused by trauma and tumor removal, yet with significant medical socioeconomic burdens. Space-occupying substitutes remain challenging in the control of osteointegration, meanwhile activation endogenous periosteal cells using non-space-occupying implants promote new formation becomes another therapeutic strategy. Here, we fabricated a magnesium-based artificial bandage optimal micropatterns for activating periosteum-associated...
Femtosecond laser ablation (FLA) has been playing a prominent role in precision fabrication of material because its circumvention thermal effect and extremely high spatial resolution. Molecular dynamics modeling, as powerful tool to study the mechanism femtosecond ablation, still lacks connection between simulation results experimental observations at present. Here we combine single-shot chirped spectral mapping ultrafast photography (CSMUP) technique experiment three-dimensional...
Abstract The knowledge of osteoarthritis (OA) has nowadays been extended from a focalized cartilage disorder to multifactorial disease. Although recent investigations have reported that infrapatellar fat pad (IPFP) can trigger inflammation in the knee joint, mechanisms behind role IPFP on OA progression remain be defined. Here, dysregulated osteopontin (OPN) and integrin β 3 signaling are found specimens both human mice. It is further demonstrated IPFP‐derived OPN participates progression,...
The ultrafast dynamics of periodic ripples are studied during their formation on the surface a gold film with prefabricated nanogroove. These transient induced by single 800-nm, 50-fs laser pulse and observed collinear pump-probe imaging method. When polarization is parallel to nanogroove, begin appearing after an elapsed time 25--80 ps, become clear regular at 400--600 ps. ripple period increases from 685 770 nm as fluence $F$ 0.73...
The spatial, temporal, and spectral information in optical imaging play a crucial role exploring the unknown world unencrypting natural mysteries. However, existing techniques can only acquire spatiotemporal or spatiospectral of object with single-shot method. Here, we develop hyperspectrally compressed ultrafast photography (HCUP) that simultaneously record object. In our HCUP, spatial resolution is $1.26\text{ }\text{ }\mathrm{lp}/\mathrm{mm}$ horizontal direction $1.41\text{ vertical...
In order to alleviate the shortage of multi-domain data and capture discourse phenomena for task-oriented dialogue modeling, we propose RiSAWOZ, a large-scale Chinese Wizard-of-Oz dataset with Rich Semantic Annotations. RiSAWOZ contains 11.2K human-to-human (H2H) multi-turn semantically annotated dialogues, more than 150K utterances spanning over 12 domains, which is larger all previous H2H conversational datasets. Both single- dialogues are constructed, accounting 65% 35%, respectively....
Ultrafast imaging can capture the dynamic scenes with a nanosecond and even femtosecond temporal resolution. Complementarily, phase provide morphology, refractive index, or thickness information that intensity cannot represent. Therefore, it is important to realize simultaneous ultrafast for achieving as much possible in detection of scenes. Here, we report single-shot intensity- phase-sensitive compressive sensing-based coherent modulation technique, shortened CS-CMUI, which integrates...
The fundamental processes of upconversion (UC) emissions from trivalent lanthanide ions are essential for designing and improving the performance UC materials. However, mechanisms involve multiple in one system because abundant energy states, which make it a challenge to exclusively verify quantitatively evaluate dominant process. In this paper, green red Er(3+) doped NaYF4-glass ceramics under 800 nm continuous wave laser excitation studied via power-dependence, polarization-dependence,...
This paper reports the ultrafast imaging on formation of periodic surface ripples induced by a single 800 nm, 50 fs laser pulse. The evolution process is observed Si with prefabricated nanogroove. emerge very quickly, only 3 ps after pulse fluence 0.18 J/cm2 irradiating surface, and last for several hundreds picoseconds. dynamics laser-matter interaction, such as free carrier excitation, lattice heating, plasmon polariton (SPP) etc, are studied theoretically. theoretical experimental results...
Inhomogeneity and low efficiency are two important factors that limit the application of laser-induced periodic surface structures (LIPSSs), especially on glass surfaces. In this study, two-beam interference (TBI) femtosecond lasers was used to produce large-area straight LIPSSs fused silica using cylindrical lenses. Compared with those produced a single circular or lens, by TBI much straighter more regular. Depending laser fluence scanning velocity, grating-like spaced surface. Their...
Guided bone regeneration (GBR) technique using a barrier membrane holds great potential to allow the single-stage reconstruction of critical-sized defects. Here, bioactive nanoneedle-like magnesium oxychloride ceramics (MOCs) are synthesized and recruited as an osteoinductive factor within polycaprolactone-gelatin A (PCL-GelA) membranous matrix generate periosteum-mimicking biphasic GBR (PCL-GelA/MOC) accelerate calvarial defect repair. The PCL-GelA/MOC acts shield for areas reservoir...
This paper reports the fabrication of regular large-area laser-induced periodic surface structures (LIPSSs) in indium tin oxide (ITO) films via femtosecond laser direct writing focused by a cylindrical lens. The LIPSSs exhibited good properties as nanowires, with resistivity almost equal to that initial ITO film. By changing fluence, nanowire resistances could be tuned from 15 73 kΩ/mm consistency ±10%. Furthermore, average transmittance range 1200–2000 nm was improved 21% 60%. LIPSS is...
Abstract Bioceramics provide promising tactics for wound healing, yet the on‐shelf products are still unmet, especially skin appendages regeneration. Herein, inorganic magnesium silicate sprays (MSS) as mineral factors to overcome existing challenges is proposed. Results indicate MSS can be synthesized by a green method without organic solvents, templates, calcination, and harmful by‐products. With amorphous phase, nanoscale, high specific surface area, reveal an improved pH‐responsive...