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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.


Absorption spectrum.Numerical results of the normalized absorption spectrum of the metamaterial (Fig. 1) for (a) d = 0.38, (b) d = 0.24, and (c) d = 0.02 (in unit mm), respectively. Analytical results given in (d–f) are obtained from solving the model Eqs (1) (2) and (3) in linear regime.
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f2: Absorption spectrum.Numerical results of the normalized absorption spectrum of the metamaterial (Fig. 1) for (a) d = 0.38, (b) d = 0.24, and (c) d = 0.02 (in unit mm), respectively. Analytical results given in (d–f) are obtained from solving the model Eqs (1) (2) and (3) in linear regime.

Mentions: In panels (a), (b), (c) of Fig. 2 we show respectively the numerical result of normalized absorption spectrum of the system versus frequency for separation d = 0.38, 0.24, and 0.02 (in unit mm), obtained by using the commercial finite difference time domain soft-ware package (CST Microwave Studio). We observe that a PIT transparency window in the absorption spectrum opens; furthermore, the transparency window becomes wider and deeper as d is reduced. These phenomena are clear indications of PIT-ATS crossover and will be analyzed in detail below.


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

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

Absorption spectrum.Numerical results of the normalized absorption spectrum of the metamaterial (Fig. 1) for (a) d = 0.38, (b) d = 0.24, and (c) d = 0.02 (in unit mm), respectively. Analytical results given in (d–f) are obtained from solving the model Eqs (1) (2) and (3) in linear regime.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f2: Absorption spectrum.Numerical results of the normalized absorption spectrum of the metamaterial (Fig. 1) for (a) d = 0.38, (b) d = 0.24, and (c) d = 0.02 (in unit mm), respectively. Analytical results given in (d–f) are obtained from solving the model Eqs (1) (2) and (3) in linear regime.
Mentions: In panels (a), (b), (c) of Fig. 2 we show respectively the numerical result of normalized absorption spectrum of the system versus frequency for separation d = 0.38, 0.24, and 0.02 (in unit mm), obtained by using the commercial finite difference time domain soft-ware package (CST Microwave Studio). We observe that a PIT transparency window in the absorption spectrum opens; furthermore, the transparency window becomes wider and deeper as d is reduced. These phenomena are clear indications of PIT-ATS crossover and will be analyzed in detail below.

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.