A5023176063- Random lasers and scattering media
- Advanced Steganography and Watermarking Techniques
- Metamaterials and Metasurfaces Applications
- Perovskite Materials and Applications
- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Chaos-based Image/Signal Encryption
- Digital Media Forensic Detection
- Advanced Antenna and Metasurface Technologies
- Neural Networks and Reservoir Computing
- Photonic and Optical Devices
- Advanced Optical Imaging Technologies
- Image and Video Quality Assessment
- Crystal Structures and Properties
- Antenna Design and Analysis
- Photonic Crystals and Applications
- Electrowetting and Microfluidic Technologies
- Neural dynamics and brain function
- Polyoxometalates: Synthesis and Applications
- Wireless Communication Security Techniques
- Advanced Optical Sensing Technologies
Tianjin University
2018-2023
University of Macau
2021-2023
A single metasurface operates as a reusable generator of different keys to encode various secret images in computational way.
Abstract Exploiting various degrees of freedom light, metasurfaces have unique advantages in multiple‐channel information storage and demonstration, which thereby provides a novel platform to convey the keys cipher images for different encryptions. Following secret sharing principle visual cryptography (VC), authors here successfully embed both computational ghost imaging (CGI) encryption into holographic metasurface‐images (meta‐images). The decryption process starts with key retrieval via...
Highly efficient multi-dimensional data storage and extraction are two primary ends for the design fabrication of emerging optical materials. Although metasurfaces show great potential in information due to their modulation different degrees freedom light, a compact detector relevant retrieval is still challenge, especially complex environments. Here, we demonstrate image process by using dual-color metasurface double-layer integrated perovskite single-pixel (DIP-SPD). Benefitting from...
Computer-generated random patterns and bucket detection are two key characteristics of computational ghost imaging (GI), which offer it a potential application in optical encryption. Here, we propose an inverse GI scheme, signals firstly selected then calculated correspondingly. Different reconstruction algorithms used to test the GI, relationship between quality error ratio factor is discussed as well. Compared with our one not only has disguised but also provides opportunity combine other...
Abstract Filter‐free color imaging is the long‐pursued solution for its simple structure, low cost, and high stability. However, a spectroscopic unit still necessary current Si‐based due to intrinsic photoresponse properties of Si. Here, authors demonstrate filter‐free color‐resolved single‐pixel (SPI) by combining working mechanism computational ghost response characteristic perovskite. Benefitting from broad linear dynamic range (106.5 dB) detectivity (4.03 × 10 14 Jones) fabricated...
The principle of computational ghost imaging (GI) offers a potential application in optical encryption. Nevertheless, large numbers keys composed random or specific patterns set an obstacle to its application. Here, we propose series pattern compression methods based on GI, which thousands are replaced by single standard image (i.e., two-dimensional data), sequence one-dimensional data) the fractional part irrational number zero-dimensional data). Different tested both simulations and...
Single-pixel imaging (SPI) can perceive the world using only a single-pixel detector, but long sampling times with series of patterns are inevitable for SPI, which is bottleneck its practical application. Developing new to reduce might provide opportunities address this challenge. Based on Kronecker product Hadamard matrix, we here design complete set patterns, called Gao-Boole SPI. Compared orthogonal basis elements valued as +1 or -1, our non-orthogonal ones and element values designed 0....
As an emerging imaging technique, computational ghost (CGI) has its unique application in image encryption. However, the long time and high requirement of transmitting data, both size data vulnerability lossy compression, limit practical communications. Using discrete cosine transform to sparse bucket signals CGI, we here propose a method by transforming from sensing matrix domain space domain, enhancing ability (i.e., encrypted image) resist compression. Based on principle first use...
Abstract Metasurfaces become an effective route to the control of not only free‐space waves but also surface plasmon polaritons (SPPs). SPPs, propagating along interface between a metal and dielectric, show properties strong enhancement local field. Thanks these essential functionalities, manipulating SPPs in metasurfaces is particular interest current research. Here, observation anomalous SPP propagation presented when traverse two whose topologies eigenmode equal‐frequency contours are...
A multi-foci metalens and a leaky-mode microtaper provide innovative platforms to achieve high-resolution, wideband light spectra in millimeter-sized devices, thereby paving new ways for the commercialization of on-fingertip spectrometers.
We demonstrate an algorithm-dependent computational ghost imaging (GI) by proposing a pattern multiplexing method. Based on the characteristics of three typical GI algorithms (i.e., traditional second-order GI, differential total variational regularization GI), we design set pseudorandom patterns to achieve different reconstructed images with algorithms. With our designed patterns, can be used for unknown scenes or prehidden images, while and are encrypt other images. Not only being critical...
Hyperbolic metasurfaces (HMSs) that possess special dispersion properties have attracted immense attention owing to their capability of manipulating electromagnetic waves in the near field. However, previous HMSs, electric and magnetic surface are excited manipulated individually. Simultaneous control has not been studied, particular, HMSs with multiple energy bands. Here, we propose demonstrate a 2D HMS enables propagation both by different means terahertz radiation excitation, there...
The organic-inorganic metal halide perovskite materials have remarkable semiconductor and light absorption characteristics. It shows excellent application prospects in the fields of optoelectronics temperature sensors. In this work, zero-dimensional lead-free (C6H14N)3Bi2I9·H2O single crystals were synthesized by conventional solvothermal reaction. crystal structure was analyzed using X-ray diffraction (SXRD). crystallized orthorhombic system with space group Pmn21. material is stable for...
On the basis of computational ghost imaging (CGI), we present a new technique, feature (FGI), which can convert color information into distinguishable edge features in retrieved grayscale images. With extracted by different order operators, FGI obtain shape and objects simultaneously single-round detection using one single-pixel detector. The distinction rainbow colors is presented numerical simulations verification FGI's practical performance conducted experiments. Furnishing perspective to...
Abstract Highly efficient multi-dimensional data storage and extraction are two primary ends for the design fabrication of emerging optical materials. Although metasurfaces show great potential in information due to their modulation different degrees freedom light, a compacted detector relevant retrieval is still challenge, especially complex environments. Here, we demonstrate image process by using dual-color metasurface double-layer integrated perovskite single-pixel (DIP-SPD). Benefitting...
Metasurfaces refer to planarized ultrathin metamaterials which promise an effective approach control not only waves in the free space but also surface plasmon polaritons (SPPs) is attractive form of electromagnetic propagating along interface between typical metals and dielectrics. Topological transition metasurfaces have emerged as a fascinating platform SPPs. In this work, we propose topological for achieving anomalous terahertz wave propagation. Combining different complementary H-shape...