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Giant Kerr nonlinearity and low-power gigahertz solitons via plasmon-induced transparency.

Bai Z, Huang G, Liu L, Zhang S - Sci Rep (2015)

Bottom Line: We propose a method to enhance Kerr nonlinearity and realize low-power gigahertz solitons via plasmon-induced transparency (PIT) in a new type of metamaterial, which is constructed by an array of unit cell consisting of a cut-wire and a pair of varactor-loaded split-ring resonators.We further show that the system suggested here also possess a giant third-order nonlinear susceptibility and may be used to create solitons with extremely low generation power.Our study raises the possibility for obtaining strong nonlinear effect of gigahertz radiation at very low intensity based on room-temperature metamaterials.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China.

ABSTRACT
We propose a method to enhance Kerr nonlinearity and realize low-power gigahertz solitons via plasmon-induced transparency (PIT) in a new type of metamaterial, which is constructed by an array of unit cell consisting of a cut-wire and a pair of varactor-loaded split-ring resonators. We show that the PIT in such metamaterial can not only mimic the electromagnetically induced transparency in coherent three-level atomic systems, but also exhibit a crossover from PIT to Autler-Townes splitting. We further show that the system suggested here also possess a giant third-order nonlinear susceptibility and may be used to create solitons with extremely low generation power. Our study raises the possibility for obtaining strong nonlinear effect of gigahertz radiation at very low intensity based on room-temperature metamaterials.

No MeSH data available.


Model and linear dispersion relation and normalized absorption spectrum.(a) Schematic of the unit cell of the plasmonic metamaterial, which consists of a CW and a pair of SRRs. Geometrical parameters of the unit cell are L = 1.7, w = 0.1, a = 0.58, b = 0.1, Px = 1.6, Py = 2.4 (in unit mm). 10-μm-thick aluminium that forms the CW and the SRR-pair pattern is etched on a Si-on-sapphire wafer comprised of 100-μm-thick undoped Si film and 2.1-mm-thick sapphire substrate (i.e. h = 2.21 mm). (b) SRR pair with a hyperabrupt tuning varactor mounted onto the slits. (c) Possible experimental arrangement for the measurement of GHz radiation in the nonlinear PIT metamaterial. (d) Normalized absorption spectrum of the CW (red), the SRR-pair (blue) and the unit cell of PIT metamaterial (green).
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f1: Model and linear dispersion relation and normalized absorption spectrum.(a) Schematic of the unit cell of the plasmonic metamaterial, which consists of a CW and a pair of SRRs. Geometrical parameters of the unit cell are L = 1.7, w = 0.1, a = 0.58, b = 0.1, Px = 1.6, Py = 2.4 (in unit mm). 10-μm-thick aluminium that forms the CW and the SRR-pair pattern is etched on a Si-on-sapphire wafer comprised of 100-μm-thick undoped Si film and 2.1-mm-thick sapphire substrate (i.e. h = 2.21 mm). (b) SRR pair with a hyperabrupt tuning varactor mounted onto the slits. (c) Possible experimental arrangement for the measurement of GHz radiation in the nonlinear PIT metamaterial. (d) Normalized absorption spectrum of the CW (red), the SRR-pair (blue) and the unit cell of PIT metamaterial (green).

Mentions: The metamaterial structure suggested here is an array of unit cell (meta-atom) consisting of a cut-wire (CW) and two SRRs with a nonlinear varactor inserted into their slits (Fig. 1(a,b)). The geometrical parameters of the unit cell are L = 1.7, w = 0.1, a = 0.58, b = 0.1, Px = 1.6, and Py = 2.4 (in unit mm). 10-μm-thick aluminium that forms the CW and the SRR-pair pattern is etched on a Si-on-sapphire wafer comprised of 100-μm-thick undoped Si film and 2.1-mm-thick sapphire substrate (i.e. h = 2.21 mm).


Giant Kerr nonlinearity and low-power gigahertz solitons via plasmon-induced transparency.

Bai Z, Huang G, Liu L, Zhang S - Sci Rep (2015)

Model and linear dispersion relation and normalized absorption spectrum.(a) Schematic of the unit cell of the plasmonic metamaterial, which consists of a CW and a pair of SRRs. Geometrical parameters of the unit cell are L = 1.7, w = 0.1, a = 0.58, b = 0.1, Px = 1.6, Py = 2.4 (in unit mm). 10-μm-thick aluminium that forms the CW and the SRR-pair pattern is etched on a Si-on-sapphire wafer comprised of 100-μm-thick undoped Si film and 2.1-mm-thick sapphire substrate (i.e. h = 2.21 mm). (b) SRR pair with a hyperabrupt tuning varactor mounted onto the slits. (c) Possible experimental arrangement for the measurement of GHz radiation in the nonlinear PIT metamaterial. (d) Normalized absorption spectrum of the CW (red), the SRR-pair (blue) and the unit cell of PIT metamaterial (green).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4562254&req=5

f1: Model and linear dispersion relation and normalized absorption spectrum.(a) Schematic of the unit cell of the plasmonic metamaterial, which consists of a CW and a pair of SRRs. Geometrical parameters of the unit cell are L = 1.7, w = 0.1, a = 0.58, b = 0.1, Px = 1.6, Py = 2.4 (in unit mm). 10-μm-thick aluminium that forms the CW and the SRR-pair pattern is etched on a Si-on-sapphire wafer comprised of 100-μm-thick undoped Si film and 2.1-mm-thick sapphire substrate (i.e. h = 2.21 mm). (b) SRR pair with a hyperabrupt tuning varactor mounted onto the slits. (c) Possible experimental arrangement for the measurement of GHz radiation in the nonlinear PIT metamaterial. (d) Normalized absorption spectrum of the CW (red), the SRR-pair (blue) and the unit cell of PIT metamaterial (green).
Mentions: The metamaterial structure suggested here is an array of unit cell (meta-atom) consisting of a cut-wire (CW) and two SRRs with a nonlinear varactor inserted into their slits (Fig. 1(a,b)). The geometrical parameters of the unit cell are L = 1.7, w = 0.1, a = 0.58, b = 0.1, Px = 1.6, and Py = 2.4 (in unit mm). 10-μm-thick aluminium that forms the CW and the SRR-pair pattern is etched on a Si-on-sapphire wafer comprised of 100-μm-thick undoped Si film and 2.1-mm-thick sapphire substrate (i.e. h = 2.21 mm).

Bottom Line: We propose a method to enhance Kerr nonlinearity and realize low-power gigahertz solitons via plasmon-induced transparency (PIT) in a new type of metamaterial, which is constructed by an array of unit cell consisting of a cut-wire and a pair of varactor-loaded split-ring resonators.We further show that the system suggested here also possess a giant third-order nonlinear susceptibility and may be used to create solitons with extremely low generation power.Our study raises the possibility for obtaining strong nonlinear effect of gigahertz radiation at very low intensity based on room-temperature metamaterials.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China.

ABSTRACT
We propose a method to enhance Kerr nonlinearity and realize low-power gigahertz solitons via plasmon-induced transparency (PIT) in a new type of metamaterial, which is constructed by an array of unit cell consisting of a cut-wire and a pair of varactor-loaded split-ring resonators. We show that the PIT in such metamaterial can not only mimic the electromagnetically induced transparency in coherent three-level atomic systems, but also exhibit a crossover from PIT to Autler-Townes splitting. We further show that the system suggested here also possess a giant third-order nonlinear susceptibility and may be used to create solitons with extremely low generation power. Our study raises the possibility for obtaining strong nonlinear effect of gigahertz radiation at very low intensity based on room-temperature metamaterials.

No MeSH data available.