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Metamaterial electro-optic switch of nanoscale thickness
被引:278
作者:
Samson, Z. L.
[1
]
MacDonald, K. F.
[1
]
De Angelis, F.
[2
,3
]
Gholipour, B.
[1
]
Knight, K.
[1
]
Huang, C. C.
[1
]
Di Fabrizio, E.
[2
,3
]
Hewak, D. W.
[1
]
Zheludev, N. I.
[1
]
机构:
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[2] Fdn Ist Italiano Tecnol, NanoBioSci Lab, I-16163 Genoa, Italy
[3] Magna Graecia Univ Catanzaro, BIONEM Lab, I-88100 Catanzaro, Italy
基金:
英国工程与自然科学研究理事会;
关键词:
chalcogenide glasses;
dielectric properties;
electron spin polarisation;
electro-optical switches;
metamaterials;
photoemission;
PHASE-CHANGE MATERIALS;
D O I:
10.1063/1.3355544
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
We demonstrate an innovative concept for nanoscale electro-optic switching. It exploits the frequency shift of a narrow-band Fano resonance mode in a plasmonic planar metamaterial induced by a change in the dielectric properties of an adjacent chalcogenide glass layer. An electrically stimulated transition between amorphous and crystalline forms of the glass brings about a 150 nm shift in the near-infrared resonance providing transmission modulation with a contrast ratio of 4:1 in a device of subwavelength thickness.
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