Plasmon-soliton waves in planar slot waveguides. II. Results for stationary waves and stability analysis

Walasik, Wiktor; Renversez, Gilles; Ye, Fangwei

doi:10.1103/physreva.93.013826

Cited by 13 publications

(70 citation statements)

References 41 publications

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“…6. We found that the threshold for the Hopf bifurcation, from which the asymmetric mode emerges, strongly decreases with the core thickness as it was already found in the simple NPSW [6,20]. One clearly sees that there is a critical value, denoted by d crit core , around 430 nm for d buf 15 nm such that below it only the S0-plas and the S0-solI modes exist [see Fig.…”

Section: Lettersupporting

confidence: 72%

“…The symmetric solitonic mode S0-solI [see solid curves in Figs. 4(a) and 4(d)] looks like the higher order purely nonlinear symmetric mode denoted SI we have found in the simple NPSW, but with different boundary conditions at the core interface due to the opposite sign of the real part of the permittivity in the outer regions [6,20]. In Fig.…”

Section: Lettermentioning

confidence: 70%

“…After this merging, above the brown S0-plas/S0-solI transition curve, the AS1-plas mode does not exist anymore. In a previous work using two different numerical methods including the FDTD, we have already shown that the results about the stability of the main symmetric and asymmetric modes derived in reference [23] from the theoretical arguments in the framework of the weak guidance approximation in nonlinear waveguides are still valid, at least numerically, in simple NPSWs except just around the bifurcation point where subtle behaviors occur [20]. Here, we have again used the nonlinear capabilities of the FDTD method implemented in the meep software [24].…”

Section: Lettermentioning

confidence: 96%

“…It is important to note that the first type of mode is not found in the simple NPSW as a linear mode whatever the used optogeometric parameters are [12,20], but a corresponding mode can be observed in structures with a semi-infinite nonlinear region and a metal one, separated by a dielectric buffer layer [5].…”

mentioning

confidence: 99%

“…In the two previous figures, the results for a simple NPSW made from the improved NPSW by removing the buffer dielectric layers are, also, shown in gray for comparison (symmetric S0-plas, asymmetric AS1plas, and antisymmetric AN0-plas). The mode notation used in our study has been chosen to coherently extend the one already introduced for the simple NPSW [12,20]. As it can be seen, in the improved NPSW, the bifurcation of the asymmetric mode from the symmetric mode and the relative positions of the three main modes are preserved.…”

mentioning

confidence: 99%

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Improved nonlinear slot waveguides using dielectric buffer layers: properties of TM waves

Elsawy

Renversez

2016

Opt. Lett.

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We propose an improved version of the symmetric metal slot waveguides with a Kerr-type nonlinear dielectric core adding linear dielectric buffer layers between the metal regions and the core. Using a finite element method to compute the stationary nonlinear modes, we provide the full phase diagrams of its main transverse magnetic modes as a function of the total power, buffer layer, and core thicknesses that are more complex than the ones of the simple nonlinear metal slot. We show that these modes can exhibit spatial transitions toward specific modes of the new structure as a function of power. We also demonstrate that, for the main modes, the losses are reduced compared to the previous structures, and that they can now decrease with power. Finally, we describe the stability properties of the main stationary solutions using nonlinear FDTD simulations.

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Section: Lettersupporting

confidence: 72%

Section: Lettermentioning

confidence: 70%

Section: Lettermentioning

confidence: 96%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Improved nonlinear slot waveguides using dielectric buffer layers: properties of TM waves

Elsawy

Renversez

2016

Opt. Lett.

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Spatial Nonlinearity in Anisotropic Metamaterial Plasmonic Slot Waveguides

Elsawy

Renversez

2017

Plasmonics

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We study the main nonlinear solutions of plasmonic slot waveguides made from an anisotropic metamaterial core with a positive Kerr-type nonlinearity surrounded by two semi-infinite metal regions. First, we demonstrate that for a highly anisotropic diagonal elliptical core, the bifurcation threshold of the asymmetric mode is reduced from GW/m threshold for the isotropic case to 50 MW/m one indicating a strong enhancement of the spatial nonlinear effects, and that the slope of the dispersion curve of the asymmetric mode stays positive, at least near the bifurcation, suggesting a stable mode. Second, we show that for the hyperbolic case there is no physically meaningful asymmetric mode, and that the sign of the effective nonlinearity can become negative.

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Nonlinear Self-Confined Plasmonic Beams: Experimental Proof

et al. 2020

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Controlling low power light beam self-confinement with ultrafast response time opens up opportunities for the development of signal processing in microdevices. The combination of a highly nonlinear medium with the tight confinement of plasmonic waves offers a viable but challenging configuration to reach this goal. In the present work, a beam propagating in a plasmonic structure that undergoes a strongly enhanced self-focusing effect is reported for the first time. The structure consists of a chalcogenide-based four-layer planar geometry engineered to limit plasmon propagation losses while exhibiting efficient Kerr self-focusing at moderate power. As expected from theory, only TM-polarized waves exhibit such a behavior. Different experimental arrangements are tested at telecom wavelengths and compared with simulations obtained from a dedicated model. The observed efficient beam reshaping takes place over a distance as low as 100 μm, which unlocks new perspectives for the development of integrated photonic devices.

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Plasmon-soliton waves in planar slot waveguides. II. Results for stationary waves and stability analysis

Cited by 13 publications

References 41 publications

Improved nonlinear slot waveguides using dielectric buffer layers: properties of TM waves

Improved nonlinear slot waveguides using dielectric buffer layers: properties of TM waves

Spatial Nonlinearity in Anisotropic Metamaterial Plasmonic Slot Waveguides

Nonlinear Self-Confined Plasmonic Beams: Experimental Proof

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