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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.


Giant Kerr nonlinearity in the PIT metamaterial.Illustrated are Re(χ(3)) (solid line) and Im(χ(3)) (dashed line) as functions of δ. System parameters used are given in the text.
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f4: Giant Kerr nonlinearity in the PIT metamaterial.Illustrated are Re(χ(3)) (solid line) and Im(χ(3)) (dashed line) as functions of δ. System parameters used are given in the text.

Mentions: Shown in Fig. 4 are curves of the real part of χ(3), i.e., Re(χ(3)) (solid line), and its imaginary part, i.e., Im(χ(3)) (dashed line), as functions of δ. When plotting the figure, the system parameters used are γ1 = 60 GHz, γ2 = 10 GHz, g = 1.79 × 1011 C·kg−1, κ0 = 2.8 × 10−8 kg·C−1cm−1GHz2, and κ = 152.5 GHz, which are obtained by fitting the numerical result given in Figs 1 and 2. The parameters α = −6 × 1014 cm−1GHz2 and β = 1.18 × 1023 cm−2GHz2 are derived from the result given in ref. 18 (see Methods). From the figure we see that: (i) Re(χ(3)) has the order of magnitude 10−6 m2V−2. Thus the Kerr coefficient of the system (χ(1) is the linear susceptibility) is of the order 10−7 m2V−2. (ii) Im(χ(3)), which contributes a nonlinear absorption to the radiation field, is much less than Re(χ(3)) when the system works in PIT transparency window (i.e., δ takes the values from −20 GHz to 20 GHz). Such suppression of the nonlinear absorption is also due to the PIT effect.


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

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

Giant Kerr nonlinearity in the PIT metamaterial.Illustrated are Re(χ(3)) (solid line) and Im(χ(3)) (dashed line) as functions of δ. System parameters used are given in the text.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f4: Giant Kerr nonlinearity in the PIT metamaterial.Illustrated are Re(χ(3)) (solid line) and Im(χ(3)) (dashed line) as functions of δ. System parameters used are given in the text.
Mentions: Shown in Fig. 4 are curves of the real part of χ(3), i.e., Re(χ(3)) (solid line), and its imaginary part, i.e., Im(χ(3)) (dashed line), as functions of δ. When plotting the figure, the system parameters used are γ1 = 60 GHz, γ2 = 10 GHz, g = 1.79 × 1011 C·kg−1, κ0 = 2.8 × 10−8 kg·C−1cm−1GHz2, and κ = 152.5 GHz, which are obtained by fitting the numerical result given in Figs 1 and 2. The parameters α = −6 × 1014 cm−1GHz2 and β = 1.18 × 1023 cm−2GHz2 are derived from the result given in ref. 18 (see Methods). From the figure we see that: (i) Re(χ(3)) has the order of magnitude 10−6 m2V−2. Thus the Kerr coefficient of the system (χ(1) is the linear susceptibility) is of the order 10−7 m2V−2. (ii) Im(χ(3)), which contributes a nonlinear absorption to the radiation field, is much less than Re(χ(3)) when the system works in PIT transparency window (i.e., δ takes the values from −20 GHz to 20 GHz). Such suppression of the nonlinear absorption is also due to the PIT effect.

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.