We proposc and numerically investigate the optical transmission behaviors of a subwavelength metal film perforated with a two-dimensional square array of compound circular holes.Enhanced optical transmission is obtain...We proposc and numerically investigate the optical transmission behaviors of a subwavelength metal film perforated with a two-dimensional square array of compound circular holes.Enhanced optical transmission is obtained by using the finite-difference time-domain（FDTD）method,which can be mainly attributed to the excitation and coupling of localized surface plasmon resonances（LSPRs） and surface plasmon polaritons（SPPs）,and Fano Resonances.The redshift of the transmission peak can be achieved by enlarging the size and number of small holes,the environmental dielectric constant.These indicate that the proposed structure has potential applications in integrated optoelectronic devices such as plasmonic filters and sensors.展开更多
基金supported by National Natural Science Foundation of China(Nos.11464019,11264017,11004088)Young Scientist Development Program of China(No.20142BCB23008)the Natural Science Foundation of Jiangxi Province,China(Nos.2014BAB212001,20112BBE5033)
文摘We proposc and numerically investigate the optical transmission behaviors of a subwavelength metal film perforated with a two-dimensional square array of compound circular holes.Enhanced optical transmission is obtained by using the finite-difference time-domain（FDTD）method,which can be mainly attributed to the excitation and coupling of localized surface plasmon resonances（LSPRs） and surface plasmon polaritons（SPPs）,and Fano Resonances.The redshift of the transmission peak can be achieved by enlarging the size and number of small holes,the environmental dielectric constant.These indicate that the proposed structure has potential applications in integrated optoelectronic devices such as plasmonic filters and sensors.
