Publications (83)
Explicit formula for the external driving field used to eliminate the decoherence of a two-state system coupled to a noise field
Jian-Qi Shen, Zhi-Chao Ruan, Sailing He
The elimination of decoherence of a multiphoton two-state quantum system by using an appropriate external driving field is considered. The multiphoton process caused by the noise f…
Dynamic Control of Collapse in a Vortex Airy Beam
Rui-Pin Chen, Khian-Hooi Chew, Sailing He
We study the self-focusing dynamics and collapse of vortex Airy optical beams in a Kerr medium. The collapse is suppressed compared to a non- vortex Airy beam in a Kerr medium as a…
Targeted and Imaging-guided In Vivo Photodynamic Therapy of Tumors Using Dual-functional, Aggregation-induced Emission Nanoparticles
Xianhe Sun, Abudureheman zebibula, Xiaobiao Dong +5
Dual-functional nanoparticles, with the property of aggregation-induced emission and the capability of reactive oxygen species, were used to achieve passive/active targeting of tum…
Can Maxwell's fish eye lens really give perfect imaging?
Fei Sun, Sailing He
Both explicit analysis and FEM numerical simulation are used to analyze the field distribution of a line current in the so-called Maxwell's fish eye lens [bounded with a perfectly…
High-subwavelength-resolution imaging of multilayered structures consisting of alternating negative-permittivty and dielectric layers with flattened transmission curves
Yi Jin, Sailing He
Multilayered structures consisting of alternating negative-permittivity and dielectric layers are explored to obtain high-resolution imaging of subwavelength objects. The peaks wit…
How to realize a negative refractive index material at the atomic level in an optical frequency range
Jian Qi Shen, Zhi Chao Ruan, Sailing He
The theoretical mechanism for realizing the negative refractive index with {\it electromagnetically induced transparency} (EIT) is studied. It is shown that in a three-level dense…
First-order correction to the Casimir force within an inhomogeneous medium
Fanglin Bao, Bin Luo, Sailing He
For the Casimir piston filled with an inhomogeneous medium, the Casimir energy is regularized and expressed with cylinder kernel coefficients by using the first-order perturbation…
Trimming and ultra-wide bandwidth expansion of silicon frequency comb spectra with self-adaptive boundary waveguides
Jianhao Zhang, Vincent Pelgrin, Carlos Alonso-Ramos +3
Dispersion engineering is among the most important steps towards a promising optical frequency comb. We propose a new and general approach to trim frequency combs using a self-adap…
A Novel Structure for Double Negative NIMs towards UV Spectrum with High FOM
Jianwei Tang, Sailing He
A novel ring structure is proposed for double negative NIMs at visible light spectrum with high FOM (e.g. about 11 at a wavelength of 583 nm) and low loss. Besides the effective me…
On subwavelength imaging with Maxwell's fish eye lens
Fei Sun, Sailing He
Both explicit analysis and FEM numerical simulation are used to analyze the field distribution of a line current in the so-called Maxwell's fish eye lens [bounded with a perfectly…
Beam Collimation Using an Anisotropic Metamaterial Slab without Any Nanometer-sized Aperture
Shou Zhang, Guohui Li, Yanxia Cui +4
Plasmonic beam collimation effect has been thoroughly investigated based on the well-known nanometer-scale bull's eye structure formed by complex and high-cost fabrication processe…
Plasmonic and Metamaterial Structures as Electromagnetic Absorbers
Yanxia Cui, Yingran He, Yi Jin +6
Electromagnetic absorbers have drawn increasing attention in many areas. A series of plasmonic and metamaterial structures can work as efficient narrow band absorbers due to the ex…
An acoustic metamaterial lens for acoustic point-to-point communication in air
Fei Sun, Shuwei Guo, Borui Li +2
Acoustic metamaterials have become a novel and effective way to control sound waves and design acoustic devices. In this study, we design a 3D acoustic metamaterial lens (AML) to a…
Imaging Studies of Characteristics for a Slab of a Lossy Left-handed Material
Linfang Shen, Sailing He
The characteristics of an imaging system formed by a slab of a lossy left-handed material (LHM) are studied. The transfer function of the LHM imaging system is written in an approp…
Omni-directional, broadband and polarization-insensitive thin absorber in the terahertz regime
Yuqian Ye, Yi Jin, Sailing He
A nearly omni-directional THz absorber for both transverse electric (TE) and transverse magnetic (TM) polarizations is proposed. Through the excitation of magnetic polariton in a m…
Efficient multiband absorber based on 1D periodic metal-dielectric photonic crystals with a reflective substrate
Yanxia Cui, Wenyan Wang, Yingran He +7
We propose an efficient multiband absorber comprising a truncated one-dimensional periodic metal-dielectric photonic crystal and a reflective substrate. The reflective substrate is…
Optical Magnetic Response in a Single Metal Nanobrick
Jianwei Tang, Sailing He
Anti-symmetric localized surface plasmons are demonstrated on a single silver nanostrip sandwiched by SiC layers. By employing the resonance of anti-symmetric localized surface pla…
Inverse Transformation Optics and Reflection Analysis for Two-Dimensional Finite Embedded Coordinate Transformation
Pu Zhang, Yi Jin, Sailing He
Inverse transformation optics is introduced, and used to calculate the reflection at the boundary of a transformation medium under consideration. The transformation medium for a pr…
Generating Fano Resonances in a single-waveguide nanobeam cavity for efficient electro-optical modulation
Jianhao Zhang, Xavier Le Roux, Elena Ruran-Valdeiglesias +5
We propose a method for generating Fano resonance in a standalone silicon nanobeam cavity which eliminates the inconvenience from the unexpected side-coupled bus waveguide and unlo…
Three-dimensional magnetic cloak working from DC to 250 kHz
Jianfei Zhu, Wei Jiang, Yichao Liu +4
Invisible cloaking is one of major outcomes of the metamaterial research, but the practical potential, in particular for high frequencies (e.g., microwave to visible light), is fat…
An Algorithm for Constructing All Families of Codes of Arbitrary Requirement in an OCDMA System
Xiang Lu, Jiajia Chen, Sailing He
A novel code construction algorithm is presented to find all the possible code families for code reconfiguration in an OCDMA system. The algorithm is developed through searching al…
Increasing efficiency of a wireless energy transfer system by spatial translational transformation
Shichao Li, Fei Sun, Di An +1
An optical translational projector (OTP) designed by transformation optics is applied to improve the energy transfer efficiency in a wireless energy transfer (WET) system. Numerica…
Optical Field Enhancement in Nanoscale Slot Waveguides of Hyperbolic Metamaterials
Yingran He, Sailing He, Xiaodong Yang
Nanoscale slot waveguides of hyperbolic metamaterials are proposed and demonstrated for achieving large optical field enhancement. The dependence of the enhanced electric field wit…
Thin Film Absorbers Based on Plasmonic Phase Resonances
Yanxia Cui, Kin Hung Fung, Jun Xu +2
We demonstrate an efficient double-layer light absorber by exciting plasmonic phase resonances. We show that the addition of grooves can cause mode splitting of the plasmonic waveg…
An efficient plate heater with uniform surface temperature engineered with effective thermal materials
Yichao Liu, Wei Jiang, Sailing He +1
Extended from its electromagnetic counterpart, transformation thermodynamics applied to thermal conduction equations can map a virtual geometry into a physical thermal medium, real…
Abnormal enhancement of electric field inside a thin permittivity-near-zero object in free space
Yi Jin, Pu Zhang, Sailing He
It is found that the electric field can be enhanced strongly inside a permittivity-near-zero object in free space, when the transverse cross section of the object is small and the…
Carpet cloaking on a dielectric half-space
Pu Zhang, Michaël Lobet, Sailing He
Carpet cloaking is proposed to hide an object on a dielectric half-space from electromagnetic (EM) detection. A two-dimensional conformal transformation specified by an analytic fu…
Observation of Multiphoton-induced Fluorescence from Nano Graphene Oxide and Its Applications in In vitro and In vivo Bioimaging
Jun Qian, Dan Wang, Li Peng +6
In the present paper, we observed both two-photon and three-photon induced distinct photoluminescence from GO nanoparticles under fs laser excitation. Conjugated with PEG molecules…
Robust and Active Visible-Light Integrated Photonics on Thin-Film Lithium Tantalate for Underwater Optical Wireless Communications
Changjian Guo, Xingjie Li, Xiaofeng Wu +7
Visible-light integrated photonics enables compact platforms for sensing, precision metrology, and free-space data links at visible wavelengths. However, many applications remain l…
An open cavity formed with a photonic crystal of negative refraction
Zhichao Ruan, Sailing He
A novel open cavity formed by three 60-degree wedges of a photonic crystal with negative effective index is designed and studied. The quality factor of the open cavity can be large…
Giant Transverse Optical Forces in Nanoscale Slot Waveguides of Hyperbolic Metamaterials
Yingran He, Sailing He, Jie Gao +1
Here we demonstrate that giant transverse optical forces can be generated in nanoscale slot waveguides of hyperbolic metamaterials, with more than two orders of magnitude stronger…
Frequency range and explicit expressions for negative permittivity and permeability for an isotropic medium formed by a lattice of perfectly conducting particles
Constantin R. Simovski, Sailing He
An analytical model is presented for a rectangular lattice of isotropic scatterers with electric and magnetic resonances. Each isotropic scatterer is formed by putting appropriatel…
Experimental demonstration of a multiphysics cloak: manipulating heat flux and electric current simultaneously
Yungui Ma, Yichao Liu, Muhammad Raza +2
In past years, triggered by their successful realizations in electromagnetics, invisible cloaks have experienced rapid development and have been widely pursued in many different fi…
Abnormal phenomena in a one-dimensional periodic structure containing left-handed materials
Liang Wu, Sailing He, Linfang Shen
The explicit dispersion equation for a one-dimensional periodic structure with alternative layers of left-handed material (LHM) and right-handed material (RHM) is given and analyze…
Truly trapped rainbow by utilizing nonreciprocal waveguides
Kexin Liu, Sailing He
The concept of a "trapped rainbow" has generated considerable interest for optical data storage and processing. It aims to trap different frequency components of the wave packet at…
Ultracompact Adiabatic Bi-sectional Tapered Coupler for the Si/III-V Heterogeneous Integration
Qiangsheng Huang, Jianxin Cheng, Liu Liu +1
An ultracompact bi-sectional adiabatic tapered coupler, which is suitable for an adiabatic mode transformation between a common single mode SOI wire waveguide and a Si/III-V hybrid…
Squeezing electromagnetic energy with a dielectric split ring inside a permeability-near-zero metamaterial
Yi Jin, Pu Zhang, Sailing He
A novel electromagnetic energy squeezing mechanism is proposed based on the special properties of permeability-near-zero metamaterials. Nearly no energy stream can enter a conventi…
Colloidal Directional Structures at a Nematic Liquid Crystal-Air Interface
Nan Wang, Julian Evans, Chenxi Li +2
We present a variety of structures formed by colloidal droplets at a nematic liquid crystal-air interface, where the elastic dipole-dipole, quadrupole-quadrupole, and dipole-quadru…
Degeneracy analysis for a super cell of a photonic crystal and its application to the creation of band gaps
Liang Wu, Sailing He
A method is introduced to analyze the degeneracy properties of the band structure of a photonic crystal making use of the super cells. The band structure associated with a super ce…
Frequency-tunable circular polarization beam splitter using a graphene-dielectric sub-wavelength film
Tuo Chen, Sailing He
Manipulating the circular polarization of light is of great importance in chemistry and biology, as chiral molecules exhibit different physiological properties when exposed to diff…
Enhancing single photon emission through quasi-bound states in the continuum of monolithic hexagonal boron nitride metasurface
Shun Cao, Yi Jin, Hongguang Dong +3
A patterned structure of monolithic hexagonal boron nitride (hBN) on a glass substrate, which can enhance the emission of the embedded single photon emitters (SPEs), is useful for…
Enhancing and suppressing radiation with some permeability-near-zero structures
Yi Jin, Sailing He
Using some special properties of a permeability-near-zero material, the radiation of a line current is greatly enhanced by choosing appropriately the dimension of a dielectric doma…
Could Interaction with Social Robots Facilitate Joint Attention of Children with Autism Spectrum Disorder?
Wei Cao, Wenxu Song, Xinge Li +6
This research addressed whether interactions with social robots could facilitate joint attention of the autism spectrum disorder (ASD). Two conditions of initiators, namely 'Human'…
On subwavelength imaging of Maxwell's fish eye lens
Fei Sun, Sailing He
Both explicit analysis and FEM numerical simulation are used to analyze the field distribution of a line current in the so-called Maxwell's fish eye lens, which has been claimed re…
High-Temperature Ultra-Broad UV-MIR High-Efficiency Absorber Based on Double Ring-Shaped Titanium Nitride Resonators
Shun Cao, Yi Jin, Hongguang Dong +4
An ultrabroad absorber based on double-ring-shaped titanium nitride (TiN) nanoresonators, which can work in high temperatures, is proposed and numerically studied. The absorber wit…
Self-adaptive waveguide boundary for wideband multi-mode four-wave mixing
Jianhao Zhang, Carlos Alonso-Ramos, Laurent Vivien +2
We propose a new approach to provide wideband multi-mode four-wave mixing, independent of the intrinsic waveguide dispersion. We adopt concepts from quantum mechanics and sub-wavel…
Topological colloids
Bohdan Senyuk, Qingkun Liu, Sailing He +4
Abundant in nature, colloids also find increasingly important applications in science and technology, ranging from direct probing of kinetics in crystals and glasses to fabrication…
Infrared perfect absorber based on nanowire metamaterial cavities
Yingran He, Huixu Deng, Xiangyang Jiao +3
An infrared perfect absorber based on gold nanowire metamaterial cavities array on a gold ground plane is designed. The metamaterial made of gold nanowires embedded in alumina host…
90 degree polarization rotator using a bilayered chiral metamaterial with giant optical activity
Yuqian Ye, Sailing He
A bilayered chiral metamaterial (CMM) is proposed to realize a 90 degree polarization rotator, whose giant optical activity is due to the transverse magnetic dipole coupling among…
A transient thermal cloak experimentally realized through a rescaled diffusion equation with anisotropic thermal diffusivity
Yungui Ma, Lu Lan, Wei Jiang +2
Transformation optics originating from the invariance of Maxwell's equations under the coordinate mapping has enabled the design and demonstration of many fascinating electromagnet…
Optical manipulation of shape-morphing elastomeric liquid crystal microparticles doped with gold nanocrystals
Yaoran Sun, Julian S. Evans, Taewoo Lee +4
We demonstrate facile optical manipulation of shape of birefringent colloidal microparticles made from liquid crystal elastomers. Using soft lithography and polymerization, we fabr…
Consistent formalism for the momentum of electromagnetic waves in lossless dispersive metamaterials and the conservation of momentum
Yingran He, Jianqi Shen, Sailing He
A new formalism for electromagnetic and mechanical momenta in a metamaterial is developed by means of the technique of wave-packet integrals. The medium has huge mass density and c…
Optical Curtain Effect: Extraordinary Optical Transmission Enhanced by Antireflection
Yanxia Cui, Jun Xu, Yinyue Lin +4
In this paper, we employ an antireflective coating which comprises of inverted pi shaped metallic grooves to manipulate the behaviour of a TM-polarized plane wave transmitted throu…
Plasmonic complex fluids of nematiclike and helicoidal self-assemblies of gold nanorods with a negative order parameter
Qingkun Liu, Bohdan Senyuk, Jianwei Tang +4
We describe a soft matter system of self-organized oblate micelles and plasmonic gold nanorods that exhibit a negative orientational order parameter. Because of anisotropic surface…
Parity-Time Symmetry Breaking in Coupled Nanobeam Cavities
Senlin Zhang, Zhengdong Yong, Yuguang Zhang +1
The parity-time symmetry (PT symmetry) breaking phenomenon is investigated in a coupled nanobeam cavity system. An exceptional point is observed during the tuning of the relation o…
A theoretical revisit of giant transmission of light through a metallic nano-slit surrounded with periodic grooves
Yanxia Cui, Sailing He
The giant transmission of light through a metallic nano-slit surrounded by periodic grooves on the input surface is revisited theoretically. It is shown that the influence to the t…
Narrow band perfect absorber for maximum localized magnetic and electric field enhancement and sensing applications
Zhengdong Yong, Senlin Zhang, Chengsheng Gong +1
Plasmonics offer an exciting way to mediate the interaction between light and matter, allowing strong field enhancement and confinement, large absorption and scattering at resonanc…
Deep subwavelength beam propagation in extremely loss-anisotropic metamaterials
Yingran He, Lei Sun, Sailing He +1
Metal-dielectric multilayer metamaterials with extreme loss-anisotropy, in which the longitudinal component of the permittivity tensor has ultra-large imaginary part, are proposed…
Ultrathin microwave absorbers made of mu-near-zero metamaterials
Shuomin Zhong, Sailing He
In this paper, mu-near-zero (MNZ) metamaterials are utilized to achieve an ultrathin absorber with a thickness of only about one percent of the operating wavelength. The metamateri…
Enhancing extraordinary transmission of light through a metallic nano slit with a nano cavity antenna
Yanxia Cui, Sailing He
The extraordinary transmission of light through a nano slit in a metal film is enhanced by introducing a nano cavity antenna formed by a nearby metallic nano-strip over the slit op…
Detecting retail products in situ using CNN without human effort labeling
Wei Yi, Yaoran Sun, Tao Ding +1
CNN is a powerful tool for many computer vision tasks, achieving much better result than traditional methods. Since CNN has a very large capacity, training such a neural network of…
Nanoscale Metamaterial Optical Waveguides with Ultrahigh Refractive Indices
Yingran He, Sailing He, Jie Gao +1
We propose deep-subwavelength optical waveguides based on metal-dielectric multilayer indefinite metamaterials with ultrahigh effective refractive indices. Waveguide modes with dif…
Ultra-broadband Light Absorption by a Sawtooth Anisotropic Metamaterial Slab
Yanxia Cui, Kin Hung Fung, Jun Xu +4
We present an ultra broadband thin-film infrared absorber made of saw-toothed anisotropic metamaterial. Absorbtivity of higher than 95% at normal incidence is supported in a wide r…
Ultra-broadband strong light absorption based on thin multilayered metamaterials
Fei Ding, Yi Jin, Hao Cheng +2
Light absorption plays an important role in many research areas. Here, we propose and demonstrate a thin ultra-broadband strong light absorber consisting of periodic taper arrays o…
Observing of the super-Planckian near-field thermal radiation between graphene sheets
Jiang Yang, Yishu Su, Yang Fu +4
Thermal radiation can be substantially enhanced in the near-field scenario due to the tunneling of evanescent waves. The monolayer graphene could play a vital role in this process…
One-way surface magnetoplasmon cavity and its application for nonreciprocal devices
Kexin Liu, Amir Torki, Sailing He
We theoretically analyze surface magnetoplasmon modes in a compact circular cavity made of magneto-optical material under a static magnetic field. Such a cavity provides two differ…
Plasmon Assisted Optical Curtains
Yanxia Cui, Jun Xu, Sailing He +1
We predict an optical curtain effect, i.e., formation of a spatially invariant light field as light emerges from a set of periodic metallic nano-objects. The underlying physical me…
Robust Circularly Polarized Luminescence via Quasi-Bound States in the Continuum in Intrinsic Chiral Silicon Metasurfaces
Xiao-ke Zhu, Yu-Chen Wei, Jose L. Pura +8
We demonstrate a circularly polarized photoluminescence emission, with dissymmetry factors over 0.1, from achiral organic dye molecules by leveraging quasi-bound st…
On unusual narrow transmission bands for a multi-layered periodic structure containing left-handed materials
Liang Wu, Sailing He, Long Chen
A multi-layered structure consisting of alternate right-handed material (RHM) and left-handed material (LHM)is considered and the unusual narrow transmission bands are explained as…
A Thin Film Broadband Absorber Based on Multi-sized Nanoantennas
Yanxia Cui, Jun Xu, Kin Hung Fung +4
We experimentally demonstrate an infrared broadband absorber for TM polarized light based on an array of nanostrip antennas of several different sizes. The broadband property is du…
First experimental demonstration of an isotropic electromagnetic cloak with strict conformal mapping
Yungui Ma, Yichao Liu, Lu Lan +4
In the past years quasi-conformal mapping has been typically used to design broadband electromagnetic cloaks. However, this technique has some inherit practical limitations such as…
Can Maxwell's Fish Eye Lens Really Give Perfect Imaging? Part II. The case with drains
Fei Sun, Xiaochen Ge, Sailing He
We use both FEM (finite element method) and FDTD (finite difference time domain method) to simulate the field distribution in Maxwell's fish eye lens with one or more passive drain…
Finite-size effects of a left-handed material slab on the image quality
Long Chen, Sailing He, Linfang Shen
The characteristics of an imaging system formed by a left-handed material (LHM) slab of finite length are studied, and the influence of the finite length of the slab on the image q…
Multi-AI competing and winning against humans in iterated Rock-Paper-Scissors game
Lei Wang, Wenbin Huang, Yuanpeng Li +2
Predicting and modeling human behavior and finding trends within human decision-making processes is a major problem of social science. Rock Paper Scissors (RPS) is the fundamental…
Reduced interhemispheric functional connectivity of children with autism: evidence from functional near infrared spectroscopy studies
Huilin Zhu, Yuebo Fan, Huan Guo +2
Autism spectrum disorder is a neuro-developmental disorder characterized by abnormalities of neural synchronization. In this study, functional near infrared spectroscopy (fNIRS) is…
Hybrid metal-dielectric ring resonators for optical magnetic metamaterials down to ultraviolet range
Jianwei Tang, Sailing He
In this paper, we derive a model from Maxwell equations for the magnetic resonance of split-ring resonators. Using this model we revisit the scaling of split-ring resonators. Inspi…
Influence of the surface termination to the point imaging by a photonic crystal slab with negative refraction
Sanshui Xiao, Min Qiu, Zhichao Ruan +1
Point imaging by a photonic crystal slab due to the negative refraction is studied theoretically. By investigating the transfer function of the imaging system, the influence of the…
LED-Induced Fluorescence System for Tea Classification and Quality Assessment
Yongjiang Dong, Xuan Liu, Liang Mei +3
A fluorescence system is developed by using several light emitting diodes (LEDs) with different wavelengths as excitation light sources. The fluorescence detection head consists of…
A novel directional coupler utilizing a left-handed material
Sanshui Xiao, Linfang Shen, Sailing He
A novel directional coupler with a left-handed material (LHM) layer between two single-mode waveguides of usual material is introduced. The coupling system is analyzed with the sup…
Energy-efficient tunable silicon photonic micro-resonator with graphene transparent nano-heaters
Longhai Yu, Yaocheng Shi, Daoxin Dai +1
Thermally-tuning silicon micro-cavities are versatile and beneficial elements in low-cost large-scale photonic integrated circuits (PICs). Traditional metal heaters used for therma…
A Polarization-insensitive and high-efficiency Schottky Photodetector integrated with a silicon ridge waveguide
Liu Yang, Pengfei Kou, Jianqi Shen +2
We propose a polarization-insensitive and high-efficiency plasmonic silicon Schottky diode for detection of sub-bandgap photons in the optical communication wavelength range throug…
Influence of the signal light on the transient optical properties of a four-level EIT medium
Jian-Qi Shen, Zhi-Chao Ruan, Sailing He
General formulae for the transient evolution of the susceptibility (absorption) induced by the quantum interference effect in a four-level N-type EIT medium is presented. The influ…
Ultra-broadband Microwave Metamaterial Absorber
Fei Ding, Yanxia Cui, Xiaochen Ge +2
A microwave ultra-broadband polarization-independent metamaterial absorber is demonstrated. It is composed of a periodic array of metal-dielectric multilayered quadrangular frustum…