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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.


PIT, PIT-ATS crossover, and ATS in the plasmonic metamaterial.(a) The dashed (dotted-dashed) line is the result of the first (second) Lorentzian term in Eq. (8). The solid line is the sum of the two Lorentzian terms, giving the absorption spectrum Im(K) in the weak coupling (PIT) region (d = 0.38 mm). (b) The dashed-dotted lines denote the first two Lorentzian terms in Eq. (9); the dashed lines denote the third and fourth terms in Eq. (9). The solid line is the sum of the all four terms, giving Im(K) in the intermediate coupling (PIT-ATS crossover) region (d = 0.24 mm). (c). The same as (b) but with d = 0.02 mm, giving Im(K) in the strong coupling (ATS) region. (d) Transition from PIT to ATS when κ changes.
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f3: PIT, PIT-ATS crossover, and ATS in the plasmonic metamaterial.(a) The dashed (dotted-dashed) line is the result of the first (second) Lorentzian term in Eq. (8). The solid line is the sum of the two Lorentzian terms, giving the absorption spectrum Im(K) in the weak coupling (PIT) region (d = 0.38 mm). (b) The dashed-dotted lines denote the first two Lorentzian terms in Eq. (9); the dashed lines denote the third and fourth terms in Eq. (9). The solid line is the sum of the all four terms, giving Im(K) in the intermediate coupling (PIT-ATS crossover) region (d = 0.24 mm). (c). The same as (b) but with d = 0.02 mm, giving Im(K) in the strong coupling (ATS) region. (d) Transition from PIT to ATS when κ changes.

Mentions: where and . We see that Im(K) consists of two Lorentzians terms. Figure 3(a) shows Im(K) as a function of δ for κ = 69 GHz. The dashed (dotted-dashed) line is the result of the first (second) Lorentzian term in Eq. (8), which is negative (positive). Because the two Lorentzians terms have the same center position but opposite sign, their superposition gives a destructive interference between CW and the SRR-pair. As a result, a small dip in Im(K) curve (i.e. the solid line) appears. Such phenomenon belongs PIT in nature.


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

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

PIT, PIT-ATS crossover, and ATS in the plasmonic metamaterial.(a) The dashed (dotted-dashed) line is the result of the first (second) Lorentzian term in Eq. (8). The solid line is the sum of the two Lorentzian terms, giving the absorption spectrum Im(K) in the weak coupling (PIT) region (d = 0.38 mm). (b) The dashed-dotted lines denote the first two Lorentzian terms in Eq. (9); the dashed lines denote the third and fourth terms in Eq. (9). The solid line is the sum of the all four terms, giving Im(K) in the intermediate coupling (PIT-ATS crossover) region (d = 0.24 mm). (c). The same as (b) but with d = 0.02 mm, giving Im(K) in the strong coupling (ATS) region. (d) Transition from PIT to ATS when κ changes.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f3: PIT, PIT-ATS crossover, and ATS in the plasmonic metamaterial.(a) The dashed (dotted-dashed) line is the result of the first (second) Lorentzian term in Eq. (8). The solid line is the sum of the two Lorentzian terms, giving the absorption spectrum Im(K) in the weak coupling (PIT) region (d = 0.38 mm). (b) The dashed-dotted lines denote the first two Lorentzian terms in Eq. (9); the dashed lines denote the third and fourth terms in Eq. (9). The solid line is the sum of the all four terms, giving Im(K) in the intermediate coupling (PIT-ATS crossover) region (d = 0.24 mm). (c). The same as (b) but with d = 0.02 mm, giving Im(K) in the strong coupling (ATS) region. (d) Transition from PIT to ATS when κ changes.
Mentions: where and . We see that Im(K) consists of two Lorentzians terms. Figure 3(a) shows Im(K) as a function of δ for κ = 69 GHz. The dashed (dotted-dashed) line is the result of the first (second) Lorentzian term in Eq. (8), which is negative (positive). Because the two Lorentzians terms have the same center position but opposite sign, their superposition gives a destructive interference between CW and the SRR-pair. As a result, a small dip in Im(K) curve (i.e. the solid line) appears. Such phenomenon belongs PIT in nature.

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.