Plasmon-Induced Transparency in Asymmetric T-Shape Single Slit

Citation:

Chen, J., Li, Z., Yue, S., Xiao, J. & Gong, Q. Plasmon-Induced Transparency in Asymmetric T-Shape Single Slit. NANO LETTERS 12, 2494-2498 (2012).
Plasmon-Induced Transparency in Asymmetric T-Shape Single Slit

摘要:

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.

SCI被引用次数:108.