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High-sensitivity bloch surface wave sensor with Fano resonance in grating-coupled multilayer structures

Chinese Physics B 2022年第4期31卷 313-319页

作者： Daohan Ge Yujie Zhou Mengcheng Lv Jiakang Shi Abubakar A.Babangida Liqiang Zhang Shining Zhu Institute of Intelligent Flexible Mechatronics Jiangsu UniversityZhenjiang 212013China National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China

A new type of device consisting of a lithium niobate film coupled with a distributed Bragg reflector(DBR)was theoretically proposed to explore and release bloch surface waves for applications in sensing and *** film and grating made of lithium niobate(LiNbO_(3))were placed on both sides of the DBR and a concentrated electromagnetic field was formed at the film *** adjusting the spatial incidence angle of the incident light,two detection and analysis modes were obtained,including surface diffraction detection and guided bloch *** diffraction detection was used to detect the gas molecule concentrations,while guided bloch detection was applied for the concentration detection of biomolecule-modulated biological *** to the drift of the Fano curve,the average sensor sensitivities from the analysis of the two modes were 1560°/RIU and 1161°/RIU,and the maximum detection sensitivity reached2320/RIU and 2200°/RIU,*** study revealed the potential application of LiNbO_(3)as a tunable material when combined with DBR to construct a new type of biosensor,which offered broad application prospects in bloch surface wave biosensors.

关键词： lithium niobate bloch surface wave Fano resonance grating structure biosensor

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Manipulating bloch surface waves in 2D: a platform concept-based flat lens

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Light(Science & Applications) 2014年第1期3卷 370-376页

作者： Libo Yu Elsie Barakat Tristan Sfez Lubos Hvozdara Joab Di Francesco Hans Peter Herzig Optics&Phatonics Technology Laboratory(OPT) Ecole Polytechinique Federale de Lausanne(EPFL)CH-2000 NeuchatelSwitzerland

At the end of the 1970s,it was confirmed that dielectric multilayers can sustain bloch surface waves(BSWs).However,BSWs were not widely studied until more *** advantage of their high-quality factor,sensing applications have focused on *** far,no work has been performed to manipulate and control the natural surface propagations in terms of defined functions with two-dimensional(2D)components,targeting the realization of a 2D *** this study,we demonstrate that 2D photonic components can be implemented by coating an in-plane shaped ultrathin(l/15)polymer layer on the dielectric *** presence of the polymer modifies the local effective refractive index,enabling direct manipulation of the *** locally shaping the geometries of the 2D components,the BSW can be deflected,diffracted,focused and coupled with 2D *** BSW manipulation in 2D,the dielectric multilayer can play a new role as a robust platform for 2D optics,which can pave the way for integration in photonic *** near-field measurements are used to study light propagation through micro-and nano-optical *** demonstrate that a lens-shaped polymer layer can be considered as a 2D component based on the agreement between near-field measurements and theoretical *** the focal shift and the resolution of a 2D BSW lens are measured for the first *** proposed platform enables the design of 2D all-optical integrated systems,which have numerous potential applications,including molecular sensing and photonic circuits.

关键词： bloch surface wave 2D optics manipulation micro-and nano-optics nanophotonics platform

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Hybrid plasmon waveguide leveraging bloch surface polaritons for sub-wavelength confinement

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Science China Technological Sciences 2013年第3期56卷 567-572页

作者： WAN YuHang ZHENG Zheng SHI XiaoGang BIAN YuSheng LIU JianSheng School of Electronic and Information Engineering Beihang University School of Instrument and Science and Optic-electronic Engineering Beihang University

A novel hybrid plasmonic waveguide based on a guided bloch surface polariton structure is proposed and *** hybrid waveguide overcomes the weak confinement in the bloch surface polariton structure caused by the diffraction *** introducing a metal stripe near the dielectric ridge located on the periodic multilayer structure that is designed to support a TM polarized bloch surface polariton,a sub-wavelength scale electric field confinement is *** coupling of the bloch surface polariton and the surface plasmon polariton results in a strong field distribution within the gap between the metal stripe and the dielectric *** variation of the characteristic of the hybrid mode is revealed via tuning the height of the ridge and the coupling ***-wavelength scale mode size is realized as well as a propagation length of about 100μm.

关键词： bloch surface wave plasmonic waveguide

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