Mr. Sharath Chellappa Profile

Sharath Chellappa

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Proceedings Article | 18 April 2016 Paper

Improved optical amplification using metamaterial based split ring structures in optical fibres

Geetha Prakash, Raaghvam Nigam, Sovan Das, Sharath Chellappa

Proceedings Volume 9883, 98831I (2016) https://doi.org/10.1117/12.2227413

KEYWORDS: Metamaterials, Split ring resonators, Optical amplifiers, Optical fibers, Plasmonics, Surface plasmons, Nanorods, Metals, Plasma, Magnetism, Electrons, Gold

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Optical fibres provide the best solutions for transmitting high speed, large amounts of data with good power efficiency. However such transmission would also need amplification for transmission over large distances. Erbium Doped Fibre Amplifiers(EDFAs) are currently being used for optical amplification. But good amplification is achievable with multiple stages and considerable length of EDFA fibres. In this paper we compare the use of Silver Split Ring Resonators(SRRs) , Gold Nano Rods and Silver Fishnet structures which give metamaterial properties to be used in optical fibres to give better amplification than EDFA based fibres. Metamaterials belong to a new class of materials with negative values for permittivity and permeability. Such materials would exhibit negative refractive index leading to these materials being called as left handed media.If such left handed media have an internal structure made of dimensions much smaller than the wavelength but sufficiently thick to exhibit bulk properties, using other optical domains such as plasmonics, it is possible to control light interactions and propagation. Artificial structures smaller than the wavelength of light can be used to enhance electric and magnetic fields. Surface plasmons can be excited on a metal and this can enhance the electric field at the surface. Our paper proposes the use of this phenomenon of achieving gain at optical frequencies by using SRRs, Fishnet structures , Nano Rods. We compare the performance of these structures and observe that they provide gain which is much more than that provided by EDFAs.

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