A5036199414- Random lasers and scattering media
- Photoacoustic and Ultrasonic Imaging
- Optical Coherence Tomography Applications
- Advanced Optical Imaging Technologies
- Photonic and Optical Devices
- Orbital Angular Momentum in Optics
- Quantum Mechanics and Non-Hermitian Physics
- Advanced Optical Sensing Technologies
- Optical Polarization and Ellipsometry
- Advanced SAR Imaging Techniques
- Advanced Fiber Laser Technologies
- Neural Networks and Reservoir Computing
- Optical Imaging and Spectroscopy Techniques
- Microwave Imaging and Scattering Analysis
- Advanced Fluorescence Microscopy Techniques
- Thermography and Photoacoustic Techniques
- Digital Holography and Microscopy
- Computer Graphics and Visualization Techniques
- Topological Materials and Phenomena
- Photonic Crystals and Applications
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Phase-change materials and chalcogenides
- Photorefractive and Nonlinear Optics
- Plasmonic and Surface Plasmon Research
- Nonlinear Photonic Systems
Sun Yat-sen University
2018-2025
East China Normal University
2024-2025
Shanghai Jiao Tong University
2021-2025
Shanghai First People's Hospital
2025
Shanghai University of Traditional Chinese Medicine
2025
Beijing Institute of Technology
2024
Xidian University
2023-2024
Zhejiang University of Technology
2024
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2023
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
2023
Thanks to the latest advancements in wavefront shaping, optical methods have proven crucial achieve imaging and control light multiply scattering media, like biological tissues.However, stability times of living specimens often prevent such from gaining insights into relevant functioning mechanisms cellular organ systems.Here we present a recursive online optimization routine, borrowed time series analysis, optimally track transfer matrix dynamic media over arbitrarily long timescales.While...
Abstract In this paper, we provide a comprehensive review of unidirectional reflectionless light propagation in photonic devices at exceptional points (EPs). EPs, which are branch point singularities the spectrum, associated with coalescence both eigenvalues and corresponding eigenstates, lead to interesting phenomena, such as level repulsion crossing, bifurcation, chaos, phase transitions open quantum systems described by non-Hermitian Hamiltonians. Recently, it was shown that judiciously...
A photonic nanojet is a highly focused optical beam with subwavelength waist on the shadow side of sphere. Successful far-field applications require long nanojets that extend afar. Using exact Mie theory, we show ultralong can be generated using simple two-layer microsphere structure, conventional materials are readily available. In particular, for glass-based microsphere, has an extension 22 wavelengths. We also formed semiconductors at infrared frequencies in free space.
Photoacoustic microscopy (PAM) is uniquely positioned for biomedical applications because of its ability to visualize optical absorption contrast in vivo three dimensions. Here we propose motionless volumetric spatially invariant resolution photoacoustic (SIR-PAM). To realize imaging, SIR-PAM combines two-dimensional Fourier-spectrum excitation with single-element depth-resolved detection. achieve lateral resolution, propagation-invariant sinusoidal fringes are generated by a digital...
The Gerchberg–Saxton (GS) algorithm, which retrieves phase information from the measured intensities on two related planes (the source plane and target plane), has been widely adopted in a variety of applications when holographic methods are challenging to be implemented. In this work, we showed that GS algorithm can generalized retrieve unknown propagating function connects these planes. As proof-of-concept, employed (GGS) optical transmission matrix (TM) complex medium through intensity...
Abstract Single-pixel holography (SPH) is capable of generating holographic images with rich spatial information by employing only a single-pixel detector. Thanks to the relatively low dark-noise production, high sensitivity, large bandwidth, and cheap price detectors in comparison pixel-array detectors, SPH becoming an attractive imaging modality at wavelengths where are not available or prohibitively expensive. In this work, we develop high-throughput compressive space-bandwidth- time...
Photoacoustic tomography (PAT), also known as optoacoustic tomography, is an attractive imaging modality that provides optical contrast with acoustic resolutions. Recent progress in the applications of PAT largely relies on development and employment ultrasound sensor arrays many elements. Although on-chip sensors have been demonstrated high sensitivity, large bandwidth, small size, rarely reported. In this work, we demonstrate a chalcogenide-based micro-ring array containing 15 elements,...
Active radar calibrators are used to derive both the amplitude and phase characteristics of a multichannel polarimetric synthetic aperture (SAR) from complex image data. Results presented an experiment carried out using NASA/JPL DC-8 aircraft SAR over calibration site at Goldstone, California. As part experiment, active (PARCs) with adjustable polarization signatures were deployed. Experimental results demonstrate that PARCs can be calibrate images successfully. Restrictions on application...
A single-photon optical diode operates on individual photons and allows unidirectional propagation of photons. By exploiting the unique polarization configuration in a waveguide, we show here that can be accomplished by coupling quantum impurity to passive, linear waveguide which possesses locally planar, circular polarization. We further provides near unitary contrast for an input pulse with finite frequency bandwidth implemented variety types waveguides. Moreover, performance is not...
Digital optical phase conjugation (DOPC) is an emerging technique for focusing light through or within scattering media such as biological tissue. Since DOPC systems are based on time reversal, they benefit from collecting much information about the scattered possible. However, existing techniques record and subsequently phase-conjugate in only a single-polarization state, limited by operating principle of spatial modulators. Here, we develop first, to best our knowledge, full-polarization...
Characterizing the transmission matrix (TM) of a multimode fiber (MMF) benefits many fiber-based applications and allows in-depth studies on physical properties. For example, by modulating incident field, knowledge TM one to synthesize any optical field at distill end MMF. However, extraction fields usually requires holographic measurements with interferometry, which complicates system design introduces additional noise. In this work, we developed an efficient method retrieve MMF in...
Optical phase conjugation (OPC)-based wavefront shaping techniques focus light through or within scattering media, which is critically important for deep-tissue optical imaging, manipulation, and therapy. However, to date, the sample thickness in OPC experiments has been limited only a few millimeters. Here, by using laser with long coherence length an optimized digital system that can safely deliver more power, we focused 532-nm tissue-mimicking phantoms up 9.6 cm thick, as well ex vivo...
We employ a genetic algorithm coupled with Mie theory to optimize the magnetic field intensity profile of photonic nanojets (PNJs) generated by multilayer microcylinders at visible wavelengths in free space. first five-layer elongate PNJs. show that properly designed microcylinder structure can generate an ultra-long PNJ beam length ~ 107.5 times illumination wavelength λ0. then narrow waist full-width half maximum 0.22λ0 be obtained outside surface optimized microcylinder. In addition,...
The multi-dimensional laser is a fascinating platform not only for the discovery and understanding of new higher-dimensional coherent lightwaves but also frontier study complex three-dimensional (3D) nonlinear dynamics solitary waves widely involved in physics, chemistry, biology materials science. Systemically controlling lightwave oscillation lasers, however, challenging has largely been unexplored; yet, it crucial both designing 3D light fields unveiling any underlying complexities. Here,...
It is shown that the assumptions about backscatter and polarimetric radar system for two approaches described in J.D. Klein's (1992) J.J. van Zyl's (1990) papers are equivalent. demonstrated that, to first order crosstalk (i.e. neglecting terms of second above), an exact solution Stokes matrix format data calibration problem exists. approach can give this first-order appropriately symmetrized data. Then it how, if properly symmetrized, be used calibrate both scattering These conclusions...
Optical scattering prevents light from being focused through thick biological tissue at depths greater than ∼1 mm. To break this optical diffusion limit, digital phase conjugation (DOPC) based wavefront shaping techniques are actively developed. Previous DOPC systems employed spatial modulators that modulated either the or amplitude of conjugate field. Here, we achieve focusing media by using polarization modulation generalized DOPC. First, describe an algorithm to extract map measured...
A frequency-encoded spatiotemporal focusing technology enables real-time optical wavefront shaping through thick scattering media.
A genetically encoded photochromic guide star is used for focusing light inside live tissue by wavefront shaping.
Multimode fibers (MMFs) are emerging as promising transmission media for delivering images. However, strong mode coupling inherent in MMFs induces difficulties directly projecting two-dimensional images through MMFs. By training two subnetworks named Actor-net and Model-net synergetically, [Nature Machine Intelligence2, 403 (2020)10.1038/s42256-020-0199-9] alleviated this issue demonstrated with high fidelity. In work, we make a step further by improving the generalization ability to...
Ultrafast imaging can capture the dynamic scenes with a nanosecond and even femtosecond temporal resolution. Complementarily, phase provide morphology, refractive index, or thickness information that intensity cannot represent. Therefore, it is important to realize simultaneous ultrafast for achieving as much possible in detection of scenes. Here, we report single-shot intensity- phase-sensitive compressive sensing-based coherent modulation technique, shortened CS-CMUI, which integrates...
We investigate the problem of arbitrary photonic-Fock-state scattering in a waveguide-QED system which consists one-dimensional waveguide coupled to two-level system. By imposing open boundary conditions that directly describe physical settings, we construct complete set eigenstates system, and elucidate mathematical structures eigenstates. In particular, show include multiphoton extended states bound states, formed by all possible partitions photon number $N$. The total is exactly described...
A photonic nanojet (PNJ) is a tightly focused beam that emerges from the shadow surface of microparticles. Due to its high peak intensity and subwavelength waist, PNJ has increasingly attracted attention, with potential applications in optical imaging, nanolithography, nanoparticle sensing. variety ways have been demonstrated further shrink waist PNJs, such as engineering microparticle geometry optimizing multilayer structure. In this simulation work, we report realization an ultranarrow...