Open AccessEnhanced optical transmission through metallic slits embedded with rectangular cavities
Author(s) -
Yan Qin,
Wei Cao,
Zhongyue Zhang
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.127302
Subject(s) - materials science , transmission (telecommunications) , optics , extraordinary optical transmission , wavelength , broadband , metal , optoelectronics , slit , surface plasmon , surface plasmon polariton , plasmon , telecommunications , physics , computer science , metallurgy
The non-resonantly enhanced optical transmission phenomenon of sub-wavelength metallic slits on a thin film is significant for broadband light harvesting devices. To improve the efficiency of transmission, in this paper, we propose a compound structure of the tapered metallic slit embedded with rectangular cavity, and its optical properties are investigated by the finite element method. The results show that the compound structure leads to a higher transmission than the tapered metallic slit without rectangular cavity. In addition, the effects of the structure parameters and the position of the rectangular cavity on the transmission property are also studied. These results would be helpful for designing metallic slits with high transmission.