Coupling-Enhanced Broadband Mid-infrared Light Absorption in Graphene Plasmonic Nanostructures

被引:68
作者
Deng, Bingchen [1 ]
Guo, Qiushi [1 ]
Li, Cheng [1 ]
Wang, Haozhe [2 ]
Ling, Xi [4 ]
Farmer, Damon B. [5 ]
Han, Shu-jen [5 ]
Kong, Jing [3 ]
Xia, Fengnian [1 ]
机构
[1] Yale Univ, Dept Elect Engn, New Haven, CT 06511 USA
[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
[3] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
[4] Boston Univ, Dept Chem, Boston, MA 02551 USA
[5] IBM TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA
基金
美国国家科学基金会;
关键词
graphene; plasmon; coupling mid -infrared photonics; spectroscopy; NANOPARTICLE CHAINS; NANOANTENNA ARRAYS; NANO-OPTICS; HYBRIDIZATION; RESONANCES; TERAHERTZ; PAIRS;
D O I
10.1021/acsnano.6b06203
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Plasmons in graphene nanostructures show great promise for mid-infrared applications ranging from a few to tens of microns. However, mid-infrared plasmonic resonances in graphene nanostructures are usually weak and narrow banded, limiting their potential in light manipulation and detection. Here, we investigate the coupling among graphene plasmonic nanostructures and further show that, by engineering the coupling, enhancement of light-graphene interaction strength and broadening of spectral width can be achieved simultaneously. Leveraging the concept of coupling, we demonstrate a hybrid two-layer graphene nanoribbon array which shows 5-7% extinction within the entire 8-14 pm (similar to 700-1250 cm(-1)) wavelength range, covering one of the important atmosphere "infrared transmission windows". Such coupled hybrid graphene plasmonic nanostructures may find applications in infrared sensing and free-space communications.
引用
收藏
页码:11172 / 11178
页数:7
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