In this paper,we designed a metamaterial absorber performed in microwave frequency band.This absorber is composed of E-shaped dielectrics which are arranged along different directions.The E-shaped all-dielectric struc...In this paper,we designed a metamaterial absorber performed in microwave frequency band.This absorber is composed of E-shaped dielectrics which are arranged along different directions.The E-shaped all-dielectric structure is made of microwave ceramics with high permittivity and low loss.Within about 1 GHz frequency band,more than 86%absorption efficiency was observed for this metamaterial absorber.This absorber is polarization insensitive and is stable for incident angles.It is figured out that the polarization insensitive absorption is caused by the nearly located varied resonant modes which are excited by the E-shaped all-dielectric resonators with the same size but in the different direction.The E-shaped dielectric absorber contains intensive resonant points.Our research work paves a way for designing all-dielectric absorber.展开更多
In this paper we present a novel nanoantenna(nantenna) design for energy harvesting. The nantenna has an 'E'shape and is placed on a Si O2 substrate. Its operation is based on the excitation of surface plasmon...In this paper we present a novel nanoantenna(nantenna) design for energy harvesting. The nantenna has an 'E'shape and is placed on a Si O2 substrate. Its operation is based on the excitation of surface plasmon polaritons through the gold arms of the E shape. By varying the lengths and widths of the arms, two overlapping working bandwidths can be achieved. This results in a wideband behavior characterized by a full width at half-maximum of about 2.2 μm centered around 3.6 μm. Two orthogonal E nantennas are placed perpendicular to each other to realize a dual-polarized nantenna. This nantenna can receive the two incident polarizations at two separate gap locations with very high isolation. The proposed structure can be used in several energy harvesting applications, such as scavenging the infrared heat from the Earth and other hot objects, in addition to optical communications.展开更多
基金Natural Science Foundation of China(NSFC)through the grant Nos.61331005,11204378 and 11274389.
文摘In this paper,we designed a metamaterial absorber performed in microwave frequency band.This absorber is composed of E-shaped dielectrics which are arranged along different directions.The E-shaped all-dielectric structure is made of microwave ceramics with high permittivity and low loss.Within about 1 GHz frequency band,more than 86%absorption efficiency was observed for this metamaterial absorber.This absorber is polarization insensitive and is stable for incident angles.It is figured out that the polarization insensitive absorption is caused by the nearly located varied resonant modes which are excited by the E-shaped all-dielectric resonators with the same size but in the different direction.The E-shaped dielectric absorber contains intensive resonant points.Our research work paves a way for designing all-dielectric absorber.
文摘In this paper we present a novel nanoantenna(nantenna) design for energy harvesting. The nantenna has an 'E'shape and is placed on a Si O2 substrate. Its operation is based on the excitation of surface plasmon polaritons through the gold arms of the E shape. By varying the lengths and widths of the arms, two overlapping working bandwidths can be achieved. This results in a wideband behavior characterized by a full width at half-maximum of about 2.2 μm centered around 3.6 μm. Two orthogonal E nantennas are placed perpendicular to each other to realize a dual-polarized nantenna. This nantenna can receive the two incident polarizations at two separate gap locations with very high isolation. The proposed structure can be used in several energy harvesting applications, such as scavenging the infrared heat from the Earth and other hot objects, in addition to optical communications.
