A5046047825- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Plasmonic and Surface Plasmon Research
- Laser Material Processing Techniques
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Laser-induced spectroscopy and plasma
- Gold and Silver Nanoparticles Synthesis and Applications
- Orbital Angular Momentum in Optics
- Terahertz technology and applications
- Optical Coatings and Gratings
- Laser-Plasma Interactions and Diagnostics
- Metamaterials and Metasurfaces Applications
- Atomic and Molecular Physics
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Traumatic Brain Injury and Neurovascular Disturbances
- Laser and Thermal Forming Techniques
- Mechanical and Optical Resonators
- Traumatic Brain Injury Research
- Silicon Nanostructures and Photoluminescence
- Strong Light-Matter Interactions
- Nanofabrication and Lithography Techniques
- Photorefractive and Nonlinear Optics
Xidian University
2023-2025
Kunming University of Science and Technology
2023-2024
Yunnan Yingmao Biotechnology (China)
2024
Hunan University of Traditional Chinese Medicine
2024
Xuzhou University of Technology
2024
Gannan Medical University
2024
Westlake University
2021-2023
Wuhan National Laboratory for Optoelectronics
2022-2023
Huazhong University of Science and Technology
2018-2023
Kunming University
2023
It is a formidable challenge to simultaneously achieve wide-gamut, high-resolution, high-speed while low-cost manufacturability, long-term stability, and viewing-angle independence in structural colors for practical applications. The conventional nanofabrication techniques fail match the requirement low-cost, large-scale flexible manufacturing. Processing by pulsed lasers can high throughput suffering from narrow gamut of ~15% sRGB or angle-dependent colors. Here, we demonstrate an...
It is always a great challenge to bridge the nano- and macro-worlds in nanoscience, for instance, manufacturing uniform nanogratings on whole wafer seconds instead of hours even days. Here, we demonstrate single-step while extremely high-throughput femtosecond laser scanning technique obtain wafer-scale, highly regular semiconductor-on-metal thin films. Our takes advantage long-range surface plasmons-laser interference, which regulated by self-initiated seed. By controlling speed, two types...
The application of femtosecond laser-induced periodic surface texturing has significant potential in medicine, optics, tribology, and biology, among other areas. However, when irradiated by a large intense laser spot, the structures usually exhibit an uncontrollable regularity, forming bifurcated patterns, thus limiting their widespread application. Irregularity originates from numerous independent branching seeds. usual solution to this problem is utilize quasi-direct writing technique,...
Efficient nonlinear Bragg diffraction was observed as an intense infrared femtosecond pulse focused on a plasma grating induced by interference between two ultraviolet laser pulses in air. The preformed electrons inside the were accelerated subsequent pulses, inducing further collisional ionization and significantly enhancing local electron density.
Abstract The enhancement and control of non-linear phenomena at a nanometer scale has wide range applications in science industry. Among these phenomena, high-harmonic generation solids is recent focus research to realize next petahertz optoelectronic devices or compact all solid state EUV sources. Here, we report on the realization first nanoscale high harmonic source. strong field regime reached by confining electric from few nanojoules femtosecond laser single 3D semiconductor waveguide....
Using the two-photon polymerization (TPP) lithography, here we propose and experimentally demonstrate a fiber-tipped Fabry-Perot interferometer (FPI) for liquid refractive index (RI) measurement. To fit aqueous environment, FPI is designed as an open-cell microstructure consisting of well-crafted surfaces together with supporting rods, where major spectral interference occurs between waveguide's facet printed surface. Subsequently, sensing performances fiber are comprehensively studied under...
Abstract Surface plasmon polaritons (SPPs), being localized at nanoscale and coherent with driving field, are attractive for large‐scale surface nanopatterning. Under femtosecond laser irradiation, the interference between incident light excited SPPs is efficient to produce periodic nanostructures. However, it generally relies on self‐initiated seeds, which random uncontrollable, leading irregular patterns. Here, controllable plasmonic nanopatterning experimentally illustrated in terms of...
Abstract We design, fabricate, optically and mechanically characterize wearable ultrathin coatings on various substrates, including sapphire, glass silicon wafer. Extremely hard ceramic materials titanium nitride (TiN), aluminium (AlN), (TiAlN) are employed as reflective, isolated absorptive coating layer, respectively. Two types of have been demonstrated. First, we deposit TiAlN after TiN substrates (TiAlN-TiN, total thicknesses <100 nm), achieving vivid viewing-angle independent surface...
Optical vortices, which carry orbital angular momentum, offer special capabilities in a host of applications. A single-laser source with dual-beam-mode output may open up new research fields nonlinear optics and quantum optics. We demonstrate dual-channel scheme to generate femtosecond, dual-wavelength, tunable signals the near infrared wavelength range. Dual-wavelength operation is derived by stimulating two adjacent periods periodically poled lithium niobate crystal. Pumped an Yb-doped...
Counterfeit identity (ID) documents pose a serious threat to personal credit and national security. As promising candidate, optical physical unclonable functions (PUFs) offer robust defense mechanism against counterfeits. Despite the innovations in chemically synthesized PUFs, challenges persist, including harmful chemical treatments, low yields, incompatibility of reaction conditions with ID document materials. More notably, surface relief nanostructures for such as wrinkles, are still at...
Laser-induced self-organization of periodic nanostructures on highly absorbing materials is widely understood to be due interference between laser and surface plasmon polaritons (SPPs) that are excited by initial roughness. The structure order naturally emerges from the propagation phase SPPs. Here, we reveal an unexplored mechanism predominantly induced quasicylindrical waves (QCWs) with negligible contributions This features a new principle emergence in growth through short-range...
Achieving laser-induced periodic surface structures with both excellent regularity and high tunability is a challenging task. In this study, we address challenge by utilizing hybrid film structure, comprising an amorphous silicon coating on copper film, to create through photochemical reaction induced laser-plasmon interference. Our experiments, corroborated numerical simulations, demonstrate significant decrease in structural periodicity from 1020 750 nm increase thickness 15 70 nm. This...
Plasmonic dimer nanoantennas can significantly boost the electric field strength in gap region, allowing for a modification of feed geometry by femtosecond laser illumination.Using resonant bowtie antennas to enhance low-fluence oscillator, here we experimentally demonstrate highly localized reshaping antennas, resulting self-optimization antenna shape.From high-resolution scanning electron micrographs and two-dimensional energy dispersive x-ray maps, analyze near-field enhanced...
We employ a broadband Ti:sapphire femtosecond oscillator to simultaneously launch two localized surface plasmon modes in rectangular plasmonic nanoholes. The resonant frequencies of these match well with our laser spectrum. As result, the nanoholes do not only efficiently boost third harmonic radiation intensity, but also significantly broaden harmonic's bandwidth, producing nanoscale deep-ultraviolet light source range 240 300 nm. Due involvement modes, beam becomes elliptically polarized...
We experimentally investigate the interaction between hybrid-morphology gold optical antennas and a few-cycle Ti:sapphire laser up to ablative intensities, demonstrating rich nonlinear plasmonic effects promising applications in coherent frequency upconversion nanofabrication technology. The two-dimensional array of hybrid consists elliptical apertures combined with bowties its minor axis. resonance is red-shifted respect central thus mainly enhances third harmonic spectrum at long...
Anapole states, accompanied by strong suppression of light scattering, have attracted extensive attention in recent years due to their supreme performance enhancing both linear and nonlinear optical effects. Although low- high-order anapole states are observed the dielectric particles with high refractive index, so far few studies touched on topic plasmonic states. Here we demonstrate theoretically numerically that ideal (strong electric dipole scattering) can be achieved metallic...
Abstract Recently, asymmetric plasmonic nanojunctions have shown promise as on‐chip electronic devices to convert femtosecond optical pulses current bursts, with a bandwidth of multi‐terahertz scale, although yet at low temperatures and pressures. Such nanoscale are great interest for novel ultrafast electronics opto‐electronic applications. Here, the device is operated in air room temperature, revealing mechanisms photoemission from nanojunctions, fundamental limitations on speed...
Femtosecond lasers are capable of fabricating uniform periodic nanostructures with a near-wavelength periodicity; however, it is challenging to produce subwavelength large-scale uniformity. Here, we investigate femtosecond laser-induced self-assembly on Si-on-Pt hybrid ultrathin films via photothermal-induced oxidation. The coexistence scattering light and surface plasmon polaritons the gives rise diversity morphologies. Depending laser power sample scanning velocity, beyond traditional...
Nanoantennas made of high-index semiconductors with a strong nonlinearity and supported optical Mie-type resonances offer promising alternative platform for nonlinear nanophotonics. In this Letter, we employ an array amorphous silicon nanodisks varying diameters to produce broadband deep-ultraviolet third harmonic few-cycle Ti:sapphire oscillator. Ultrashort light pulses efficiently deposit their energy at the center disks where electric field is strongly amplified by anapole states. This...
We experimentally investigated the formation of a wavelength-scale photonic plasma grating induced by interference-assisted coalescence two noncollinear ultraviolet femtosecond laser pulses. The period created decreased with crossing angle interacting For proper small angle, filaments were coalesced and an intense single filament was formed diameter 5 μm which below focused limitation. This may provide way to control filamentation.
We demonstrated efficient generation of intense vacuum ultraviolet pulses at 133 nm directly from a 400-nm filament in argon gas. The conversion efficiency was significantly enhanced by adding coaxial 267-nm pump pulse to dramatically ameliorate the phase matching conditions, as dispersion originated neutral atoms compensated additional free electrons stemmed ionization induced dual-color fields. Such robust all-optical phase-matching control shown be dependent upon intensity and temporal...