A5058317218- Metamaterials and Metasurfaces Applications
- Advanced Optical Imaging Technologies
- Advanced Antenna and Metasurface Technologies
- Advanced optical system design
- Neural Networks and Reservoir Computing
- Optical Systems and Laser Technology
- Orbital Angular Momentum in Optics
- Thermal Radiation and Cooling Technologies
- Optical Coatings and Gratings
- Antenna Design and Analysis
- Advanced Measurement and Detection Methods
- Photonic and Optical Devices
- Optical Wireless Communication Technologies
- solar cell performance optimization
- Plasmonic and Surface Plasmon Research
- Image Processing Techniques and Applications
- Optical Coherence Tomography Applications
- Color Science and Applications
- Optical Network Technologies
Shenzhen University
2018
The metalens has vast applications in biomedicine and industrial manufacturing due to their ultrathin structure vital ability manipulate the properties of light waves for long-infrared systems. However, it is difficult achieve confocal function with high focusing efficiency, wide wavelength bandwidth, low structural complexity. Here, we propose experimentally demonstrate an all-silicon dielectric composed arrays minimalist meta-atoms a single rectangular nanopillar arranged on periodic...
In this work, a simple dielectric metasurface hologram is proposed and designed by combining the electromagnetic vector analysis method immune algorithm, which can realize holographic display of dual wavelength orthogonal-linear polarization light in visible band, solve problem low efficiency traditional design hologram, effectively improve diffraction hologram. The titanium dioxide nanorod based on rectangular structure optimized designed. When x-linear polarized with 532 nm y-linear 633...
The multi-channel perfect vortex (PV) array based on metasurface has important applications in optical communication, particle manipulation, quantum optics, and other fields due to its ultra-thin structure excellent wavefront control ability. However, it is very challenging utilize a single simultaneously achieve independent channel PV arrays at different wavelengths with low crosstalk structural complexity. Here, we propose design rectangular structured TiO 2 , achieving beam...
In this paper, an optical correlator which adopts planar integrated 2F structure and optimal tradeoff synthetic discriminant function filter is proposed to improve the system integration recognition ability. The specialized digital microlens designed for replace physical lens. By theoretical analysis, structural design conditions parameters of are given, volume 63.1 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> only half 4F...
A neural network model is constructed according to 4F optical correlator. New filter obtained by training the network. For recognition of distortion targets, correlation peaks from correlator applying new are averagely increased up 306.7% than OTSDF filter, and higher, sharper easier be distinguished, which indicates with have better performance in invariant recognition.
The orbital angular momentum (OAM) multiplexing holography has the advantages of large information capacity and high security, important application value in holographic storage, optical encryption, computing. However, as number channels increases, this technology suffers from deterioration image quality, which limits its scope. This article proposes an innovative design that introduces diffractive neural network (ODNN) into OAM holography, establishes a scientific quality evaluation...
In this paper, we propose a new method to realize both polarization-multiplexing and wavelength-multiplexing using simple structure, which can hologram by the multiplexing of double wavelengths polarization in visible band. Our design reduce color cross-talk have higher diffraction efficiency. We transmission metasurface composed rectangular cells. Firstly, establish relationship structural parameters with phase under various incident conditions light beams. Then fitness function that...
Multi-wavelength confocal lens is an indispensable part of optical system, the traditional system often added by a certain number lenses, or uses different combination lenses materials to implement multi-wavelength co-focusing,making possess larger volume and weight, which, however, difficult meet requirements for high integration miniaturization system. As element composed two-dimensional planar subwavelength micro-element structure, metalens has advantages flatness, ultra-thinness...
Optical diffractive neural network (ODNN) uses light wave as a computing medium to perform the inference and prediction function of network, which has advantages high speed, low power consumption, parallel processing. In this work, an ODNN with only three layers phase modulation is designed, method improve recognition performance based on first-order spectral distribution targets proposed. Using method, parameters three-layer are effectively optimized optimal pixel size, diffraction...