Electronically tunable extraordinary optical transmission in graphene plasmonic ribbons coupled to subwavelength metallic slit arrays

被引：110

作者：

Kim, Seyoon ^{[1
]}

Jang, Min Seok ^{[1
,2
]}

Brar, Victor W. ^{[1
,3
]}

Tolstova, Yulia ^{[1
]}

Mauser, Kelly W. ^{[1
]}

Atwater, Harry A. ^{[1
,3
]}

机构：

[1] CALTECH, Thomas J Watson Lab Appl Phys, Pasadena, CA 91125 USA

[2] Korea Adv Inst Sci & Technol, Sch Elect Engn, Daejeon 34141, South Korea

[3] CALTECH, Kavli Nanosci Inst, Pasadena, CA 91125 USA

来源：

Nature Communications | 2016年 / 7卷

关键词：

HOLE ARRAYS; METASURFACES; FILMS; HYBRIDIZATION; ABSORPTION; DEPOSITION; ATOMS;

D O I：

10.1038/ncomms12323

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Subwavelength metallic slit arrays have been shown to exhibit extraordinary optical transmission, whereby tunnelling surface plasmonic waves constructively interfere to create large forward light propagation. The intricate balancing needed for this interference to occur allows for resonant transmission to be highly sensitive to changes in the environment. Here we demonstrate that extraordinary optical transmission resonance can be coupled to electrostatically tunable graphene plasmonic ribbons to create electrostatic modulation of mid-infrared light. Absorption in graphene plasmonic ribbons situated inside metallic slits can efficiently block the coupling channel for resonant transmission, leading to a suppression of transmission. Full-wave simulations predict a transmission modulation of 95.7% via this mechanism. Experimental measurements reveal a modulation efficiency of 28.6% in transmission at 1,397 cm(-1), corresponding to a 2.67-fold improvement over transmission without a metallic slit array. This work paves the way for enhancing light modulation in graphene plasmonics by employing noble metal plasmonic structures.

引用

页数：8

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