【摘 要】
：
A strong chiral near-field plays significant roles in the detection,separation and sensing of chiral molecules.In this paper,a simple and symmetric metasurface is proposed to generate strong chiral near-fields with both circularly polarized light and line
【机 构】
：
Chongqing Key Laboratory of Intelligent Perception and BlockChain Technology,Chongqing Technology an
论文部分内容阅读
A strong chiral near-field plays significant roles in the detection,separation and sensing of chiral molecules.In this paper,a simple and symmetric metasurface is proposed to generate strong chiral near-fields with both circularly polarized light and linearly polarized light illuminations in the mid-infrared region.Owing to the near-field interaction between plasmonic resonant modes of two nanosheets excited by circularly polarized light,there is a strong single-handed chiral near-field in the gap between the two graphene nanosheets and the maximum enhancement of the optical chirality could reach two orders of magnitude.As expected,the intensity and the response wavelength of the chiral near-fields could be controlled by the Fermi level and geometrical parameters of the graphene nanosheets,as well as the permittivity of the substrate.Meanwhile,based on the interaction between the incident field and scattered field,the one-handed chiral near-field in the gap also could be generated by the linearly polarized light excitation.For the two cases,the handedness of the chiral near-field could be switched by the polarized direction of the incident light.These results have potential opportunities for applications in molecular detection and sensing.
其他文献
Computational ghost imaging (CGI) provides an elegant framework for indirect imaging,but its application has been restricted by low imaging performance.Herein,we propose a novel approach that significantly improves the imaging per-formance of CGI.In this
Flower-like tungsten disulfide (WS2) with a diameter of 5-10 μm is prepared by chemical vapor deposition (CVD).Scanning electron microscopy (SEM),energy dispersive spectrometer (EDS),Raman spectroscopy,and ultraviolet-visible(UV-vis) spectroscopy are used
The density functional theory method is utilized to verify the electronic structures of SiC nanotubes (SiCNTs) and SiC nanoribbons (SiCNRs) one-dimensional (1D) van der Waals homojunctions (vdWh) under an applied axial strain and an external electric fiel
The U-Nb alloy,as a kind of nuclear material with good corrosion resistance and mechanical properties,plays an important role in the nuclear industry.However,the experimental measurements and theoretical calculations of many parameters which are essential
The defect-related photoconductivity gain and persistent photoconductivity (PPC) observed in Ga2O3 Schottky pho-todetectors lead to a contradiction between high responsivity and fast recovery speed.In this work,a metal-semiconductor-metal (MSM) Schottky p
Studies show that the sample thickness is an important parameter in investigating the thermal transport properties of materials under high-temperature and high-pressure (HTHP) in the diamond anvil cell (DAC) device.However,it is an enormous challenge to m
Manipulating metal-insulator transitions in strongly correlated materials is of great importance in condensed matter physics,with implications for both fundamental science and technology.Vanadium dioxide (VO2),as an ideal model system,is metallic at high
We investigate the existence and dynamical stability of multipole gap solitons in Bose-Einstein condensate loaded in a deformed honeycomb optical lattice.Honeycomb lattices possess a unique band structure,the first and second bands intersect at a set of s
We report the transport properties of a topological insulator candidate,LiMgBi.The electric resistivity of the title compound exhibits a metal-to-semiconductor-like transition at around 160 K and tends to saturation below 50 K.At low temperatures,the magn
The anisotropic magnetoresistances (AMRs) in single crystalline Co(6 nm)/SrTiO3(001) heterostructures from 5 K to 300 K with the current direction setting along either Co[100]or Co[110]are investigated in this work.The anomalous(normal) AMR is observed be