%0 Journal Article %J NANO LETTERS %D 2012 %T Plasmon-Induced Transparency in Asymmetric T-Shape Single Slit %A Chen, Jianjun %A Li, Zhi %A Yue, Song %A Xiao, Jinghua %A Qihuang Gong %K destructive interference %K electromagnetically induced transparency %K surface plasmon polaritons %K symmetry breaking %X

By utilizing a dielectric-film-coated asymmetric T-shape single slit, comprising two grooves of slightly detuned widths immediately contacting with a single nanoslit, the plasmon-induced transparency was experimentally demonstrated. Because of the symmetry breaking in the unit-cell structure, the scattered lights from the two grooves with slightly detuned widths interfere destructively, leading to the plasmon-induced transparency. As a result, a response spectrum with nearly the same interference contrast but a much narrower bandwidth emerges in the unit-cell structure with the footprint of only about 0.9 mu m(2), compared with that in the symmetric T-shape single slit. These pronounced features in the structure, such as the increased quality factor, ultracompact size, easy fabrication, and experimental observation, have significant applications in ultracompact plasmonic devices.

%B NANO LETTERS %I AMER CHEMICAL SOC %C 1155 16TH ST, NW, WASHINGTON, DC 20036 USA %V 12 %P 2494-2498 %8 MAY %G eng %9 Article %] 000303696400056 %R 10.1021/nl300659v