A5100349262- Orbital Angular Momentum in Optics
- Laser-Matter Interactions and Applications
- Landslides and related hazards
- Fire effects on ecosystems
- Near-Field Optical Microscopy
- Digital Holography and Microscopy
- Optical Coatings and Gratings
- Optical Polarization and Ellipsometry
- Lightning and Electromagnetic Phenomena
- Optical measurement and interference techniques
- Cryospheric studies and observations
- Optical Coherence Tomography Applications
- Hydrology and Sediment Transport Processes
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Experimental and Theoretical Physics Studies
- Flood Risk Assessment and Management
- Advanced optical system design
- Photonic and Optical Devices
- Spectroscopy Techniques in Biomedical and Chemical Research
- Dam Engineering and Safety
- Particle Detector Development and Performance
- Electromagnetic Scattering and Analysis
- Advanced Optical Sensing Technologies
- Dark Matter and Cosmic Phenomena
Lanzhou University
2015-2024
Northwest Women's and Children's Hospital
2024
University of Chinese Academy of Sciences
2023-2024
Chinese Academy of Sciences
2000-2023
Zhengzhou University
2023
Institute of High Energy Physics
2023
Lanzhou Veterinary Research Institute
2023
Chinese Academy of Agricultural Sciences
2023
Nanjing University of Science and Technology
2017-2023
Northwest Institute of Eco-Environment and Resources
2023
A necessary condition for generating optical beams with a nearly uniform profile at certain transverse plane is proposed. This proposal leads to the introduction of set light flat-topped profiles. can be expressed as finite series lowest-order Gaussian modes TEM00 different parameters. The main features this are investigated and compared those predicted by existing models flattened beams.
It was recently shown that, when a converging spherical wave is focused in diffraction-limited system of sufficiently low Fresnel numbers, the point maximum intensity does not coincide with geometrical focus but located closer to exit pupil. In present paper both qualitative and quantitative arguments are presented that elucidate modifications whole three-dimensional structure diffracted field undergoes as number gradually decreased. Contours equal focal region for systems selected which...
The continued increase in demand for food is such that flood-irrigation-based agricultural techniques are not expected to change the future. Consequently, cultivated areas dominated by river terraces experience neotectonic movements, catastrophes caused earthquakes trigger material liquefaction may continue occur. Among catastrophes, low-angle, ultra-long-distance landslides induced synergistic effects of tectonic and human activities events fully understood but can potentially be mitigated....
The behavior along the axis of intensity arising from diffraction a uniform, converging spherical wave at circular aperture is studied on basis theory boundary-diffraction wave. results are used to determine location principal maximum and elucidate dependence focal shift both Fresnel number f focusing geometry. Analytic as well numerical obtained. Comparison with microwave experiments Farnell [ Can. J. Phys.36, 935 ( 1958)] also made.
Nonparaxial ray tracing is performed to investigate the field scanned out by a single beam through two rotatable thick prisms with different parameters, and general solution obtained then expanded into power series establish third-order theory for Risley that paves way topics of interest such as optical distortions in scan pattern an analytical inverse problem Risley-prism-based laser steering system; i.e., concerned how direct any specified direction within angular range system.
Vaccination remains the most effective strategy for preventing infectious diseases. Subunit vaccines, which consist of antigenic components derived from pathogens, offer significant advantages in terms biosafety, ease preparation, and scalability. However, subunit vaccines often exhibit lower immunogenicity than whole-pathogen do. To address this limitation, coupling antigens with nanoparticles has emerged as a promising enhancing immune responses by mimicking pathogen structures improving...
Expressions are derived for the radiant intensity generated by a planar, anisotropic, Gaussian, Schell-model source of any state coherence. It is found that with an appropriate choice parameters may be rotationally symmetric about plane and even become identical produced completely coherent laser source.
The intensity distribution of diffraction patterns has been measured for focusing systems Fresnel numbers near unity. Results, presented in charts and photographs, are compared with theoretical predictions along the axis various planes parallel to geometric focal plane. Close agreement between them obtained.
Analytical expressions are derived for a new set of optical beams, in which the radial dependence is described by sum Bessel distributions different orders, modified flat-topped Gaussian function expressed form 1 - [1 exp(-xi2)]M, where xi dimensionless parameter and M(> or = 1) scalar quantity. The can be readily expanded into series lowest-order modes with parameters; this situation makes it possible to express beam as conventional Bessel-Gaussian beams orders. propagation features...