Metamaterial electro-optic switch of nanoscale thickness

Sámson, Z. L.; MacDonald, K. F.; De Angelis, F.; Gholipour, B.; Knight, K.; Huang, C. C.; Di Fabrizio, E.; Hewak, D. W.; Zheludev, N. I.
April 2010
Applied Physics Letters;4/5/2010, Vol. 96 Issue 14, p143105
Academic Journal
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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