A5102967594- Terahertz technology and applications
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Laser Material Processing Techniques
- Spectroscopy and Laser Applications
- Laser-induced spectroscopy and plasma
- Spectroscopy and Quantum Chemical Studies
- Photonic and Optical Devices
- Nonlinear Optical Materials Studies
- Metamaterials and Metasurfaces Applications
- Laser-Ablation Synthesis of Nanoparticles
- Applied Advanced Technologies
- Plasmonic and Surface Plasmon Research
- Photonic Crystals and Applications
- Advanced Antenna and Metasurface Technologies
- Orbital Angular Momentum in Optics
- Microwave Engineering and Waveguides
- Advanced Chemical Physics Studies
- Luminescence Properties of Advanced Materials
- Luminescence and Fluorescent Materials
- Nanofabrication and Lithography Techniques
- Gyrotron and Vacuum Electronics Research
- Advanced Data and IoT Technologies
- Advanced Fluorescence Microscopy Techniques
- Telecommunications and Broadcasting Technologies
China Mobile (China)
2024
Tianjin Medical University
2021-2022
Tianjin Medical University Eye Hospital
2021-2022
Nankai University
2017-2021
Southwest Petroleum University
2021
PetroChina Southwest Oil and Gas Field Company (China)
2021
Wuhan College
2014
Superhigh brightness, reliability, and modularization are three key features of state-of-the-art high-brightness solid state lighting, such as high-power white light-emitting diodes (white LEDs) laser LDs). However, these inevitably limited by the organic resin packing material, a crucial component lighting device, because its unstable property at high temperature low thermal conductivity. Here, we report robust light convertor that can simultaneously play roles phosphor an alternative...
Nonuniform azimuthal distribution of N2+ fluorescence emitted from the femtosecond laser filament in air was discovered. The is stronger when detector placed perpendicular or parallel to polarization. experimental results have been confirmed by theoretical calculation that reproduced convolution transition dipole and molecular alignment strong field. would provide new insight into laser-molecule interactions during filamentation, which are important practice for remote sensing using filamentation.
Abstract In this work, multiple filamentation competition of femtosecond pulse in methanol is studied both experimentally and numerically. The visualization has been realized the experiment performing three-photon fluorescence Coumarin 440. random changes stemmed from jitter peak laser intensity ratio initial hot spots are first observed directly visually, which can be well explained by a simplified (2D+1)-dimensional model.
Two-color femtosecond (fs) laser filamentation in the gas medium is an effective way to generate broadband and high intensity terahertz (THz) pulse. The interdigitated photoconductive antenna (iPCA) has advantages of both detection signal-to-noise ratio (SNR), which a very detect THz pulse produced by two-color fs filamentation. signal from comprehensively characterized iPCA, achieves SNR, sensitivity, polarization detection. This work provides new idea for power coherent
Terahertz (THz) radiation induced by the femtosecond laser filament in air can be strongly enhanced through applying an external DC field. In present work, this technique has been extended to two-dimensional biasing; namely, two pairs of electrodes, which are placed perpendicular each other, applied provide crossing fields. The experimental results have demonstrated that amplitudes orthogonal components polarized THz pulse could modulated electric field parallel it, situ and real-time...
This article studies the effect of titling a beta-barium borate (BBO) crystal on efficiency generating terahertz (THz) radiation by dual-color femtosecond laser filamentation. It is found that tilting BBO can compensate for phase difference and reduce spatial walk-off distance between fundamental pulse second harmonic pulse. In increasing intensity THz radiation, method simple complementary to conventional adjusting BBO-to-focus distance.
The breakdown and related bubble dynamics driven by femtosecond laser pulses in liquid are very critical for the optimization of parameters applications medical nano/micro-object manipulation. In this paper, we conduct systematic research on methanol a few successive under 1 kHz repetition rate. It is demonstrated that it more probable two or to induce optical than only single pulse. A physical scenario from generation evolution presented interacting with sample, which also give reasonable...
Abstract The sixth-generation wireless communication will exploit the radio band with frequencies higher than 90 GHz, reaching terahertz (THz) band, to achieve huge signal bandwidths. However, cost-effective fabrication methods of key components in THz which can compromise large scale, high precision, and efficiency, remain great challenges at present. In this work, we have developed a throughput method based on femtosecond laser filament direct writing. ability fabricating large-scale...
When the near-infrared femtosecond Bessel laser beam (fs-BLB) is obliquely incident on silica glass, annular beams (ABs) with bandwidths of several tens nanometers and different peak wavelengths discretely distributed in a visible range are generated simultaneously. It considered that four-wave mixing (FWM) corresponding cascaded parametric processes responsible for generation multi-wavelength ABs. also found broken symmetry optical setup due to oriented glass absorption band sample...
In this paper, we proposed a metamaterial polarization transformer which exhibits linear dichroism and conversion simultaneously. Through simulation experiment studies in the microwave regime, it was found that only cross-polarization transmissions of x-polarized waves co-polarization y-polarized are allowed designed structures. As result, metamaterials can transform any polarizations into y-polarizations with signal-to-noise ratios over 20 dB 0.6.
This publisher’s note corrects a piece of funding information in J. Opt. Soc. Am. B35, 2727 (2018)JOBPDE0740-322410.1364/JOSAB.35.002727.
Drilling and completion practices for Permian volcanic formation in Sichuan Basin show that the is usually featured by complex lithology, strong heterogeneity, uncertainty. Consequently, a huge risk of borehole collapse observed during drilling completion, which seriously affects safety, efficiency, costs natural gas wells. However, classical analysis method wellbore stability cannot effectively evaluate formation. Therefore, view lithology heterogeneity formation, reliability theory...
In this work, the visualization of multiple filamentation competition has been realized in experiment performing three-photon fluorescence Coumarin 440. The random changes stemmed from jitter peak laser intensity ratio initial hot spots are first observed directly and visually, which can be well explained by a simplified (2D+1)-dimensional model.
An ultrabroad terahertz metamaterial filter based on multiplexed metallic bar resonators is designed and fabricated. The bandwidth of can be significantly broadened by the configurations.
A spectrally wide-band terahertz modulator based on monolayer graphene germanium (GOG) is proposed. Utilizing a homemade THz-TDS (Terahertz-time domain spectroscopy) system, we experimentally demonstrated that the THz can be tuned by 1550 nm pump beam in frequency range from 0.2 to 1.5 THz. The average transmittance of decreases 40% 22% when power increased 250 mW, while absorption coefficient averaged increases 19 cm<sup>-1</sup> 44 cm<sup>-1</sup>. maximum modulation depth GOG reach as...