We propose a Fano switch arising from the superlattice array of a plasma-filled quartz tube,which can be tuned and reconfigured by the plasma density in the tube.The generation of the switch depends on a Fano band that ...We propose a Fano switch arising from the superlattice array of a plasma-filled quartz tube,which can be tuned and reconfigured by the plasma density in the tube.The generation of the switch depends on a Fano band that is induced by the interference between the Mie resonance in an isolated cylinder and Bragg scattering in a periodic array.The underlying dispersion characteristics reveal that a localized tunableflat band corresponding to the Mie resonance plays an important role in the appearance of the Fano resonance.This active tunable switch can be potentially applied to microwave communications as a single-pole multi-throw switch and to monitor environmental variables that impact the plasma density.展开更多
We show that a metasurface composed of a subwavelength metallic slit array embedded in an asymmetric dielectric environment can exhibit either diffraction （EOD）. The cascaded refractive extraordinary optical transmi...We show that a metasurface composed of a subwavelength metallic slit array embedded in an asymmetric dielectric environment can exhibit either diffraction （EOD）. The cascaded refractive extraordinary optical transmission （EOT） or extraordinary optical indices of the dielectrics can leverage multiple decaying passages into variant subsections with different diffraction order combinations according to the diffraction order chart in the k-vector space, providing a flexible by changing the wavevector of the efficiencies can be enhanced to near or EOD in a single tional metasurface onstrated. Our findings incident light. As a result, either the unity by the excitation of the localized provide a convenient way components on a single planar device.展开更多
基金supported by National Natural Science Foun-dation of China(Nos.11965009,61761010,61765004,61764001 and 62075084)Natural Science Foundation of Guangxi(Nos.2018JJA170010 and 2018GXNSFAA281193)by the Guangdong Basic and Applied Basic Research Foundation(No.2020A1515010615).
文摘We propose a Fano switch arising from the superlattice array of a plasma-filled quartz tube,which can be tuned and reconfigured by the plasma density in the tube.The generation of the switch depends on a Fano band that is induced by the interference between the Mie resonance in an isolated cylinder and Bragg scattering in a periodic array.The underlying dispersion characteristics reveal that a localized tunableflat band corresponding to the Mie resonance plays an important role in the appearance of the Fano resonance.This active tunable switch can be potentially applied to microwave communications as a single-pole multi-throw switch and to monitor environmental variables that impact the plasma density.
基金National Natural Science Foundation of China(NSFC)(11604217,11574218,11734012,61420106014,61522504)Fundamental Research Funds for the Central Universities(21617410)Guangdong Provincial Innovation and Entrepreneurship Project(2016ZT06D081)
文摘We show that a metasurface composed of a subwavelength metallic slit array embedded in an asymmetric dielectric environment can exhibit either diffraction （EOD）. The cascaded refractive extraordinary optical transmission （EOT） or extraordinary optical indices of the dielectrics can leverage multiple decaying passages into variant subsections with different diffraction order combinations according to the diffraction order chart in the k-vector space, providing a flexible by changing the wavevector of the efficiencies can be enhanced to near or EOD in a single tional metasurface onstrated. Our findings incident light. As a result, either the unity by the excitation of the localized provide a convenient way components on a single planar device.
