Backward and forward modes guided by metal-dielectric-metal plasmonic waveguides

Davoyan, Artur R.; Shadrivov, Ilya V.; Bozhevolnyi, Sergey I.; Kivshar, Yuri S.

doi:10.1117/1.3437397

Cited by 41 publications

(31 citation statements)

References 20 publications

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“…4a, b. Figure 4a shows that the changes in β c1 d are almost the same when αE 2 0 is varied for d = 10 and 50 nm, and also that the mode degeneracy may occur at fixed frequencies for 0.14 < αE 2 0 < 0.7; a similar behavior has also been reported for metallic waveguides [29]. A clear difference between the dispersion curves for the waveguides of different thicknesses is seen from Fig.…”

Section: Resultssupporting

confidence: 61%

“…3c to see how the modes are confined). Similar to the backward SPs of a nonlinear plasmonic slot waveguide [24,25,29], the modes with negative dispersion of the GKG PPW (we call them fast-light SPs) are associated with much stronger electric fields than the modes traveling forward for β < β c1 . This can be seen by comparing the typical values of E x and E z in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Guided Plasmon Modes of a Graphene-Coated Kerr Slab

et al. 2015

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We study analytically propagating surface plasmon modes of a Kerr slab sandwiched between two graphene layers. We show that some of the modes that propagate forward at low field intensities start propagating with negative slope of dispersion and positive flux of energy (fast-light surface plasmons) when the field intensity becomes high. We also discover that our structure supports an additional branch of low-intensity fast-light guided modes. The possibility of dynamically switching between the forward and the fast-light plasmon modes by changing the intensity of the excitation light or the chemical potential of the graphene layers opens up wide opportunities

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Guided Plasmon Modes of a Graphene-Coated Kerr Slab

et al. 2015

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“…As it was shown in [17] and [19] for fields with frequencies close to the waveguide's cut-off frequency, these two components become comparable. This leads to a low group velocity, and implicitly, to a high group index as well as to low waveguide index, comparable to one or even smaller than one when the operating frequency approaches to the cut-off.…”

Section: A Layout Of the Stucturementioning

confidence: 68%

“…The linear properties of this type of waveguide have been thoroughly investigated in the literature [17]. The parameter determining the modal characteristics of the waveguide is the ratio ρ = | m |/ d , with m the dielectric constant of the metal.…”

Section: Introductionmentioning

confidence: 99%

Self-Pulsation in a Nonlinear Plasmonic Ring Resonator

Kusko

2013

IEEE J. Quantum Electron.

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We demonstrate the self-pulsing behavior in a nonlinear all-pass plasmonic microring resonator (MRR). The structure consists of a nonlinear metal-dielectric-metal (MDM) plasmonic waveguide and supports antisymmetric, backward propagating slow-modes. The slow modes are coupled to a feedback loop realized from a MDM waveguide, which supports symmetric, forward propagating fast modes. We calculate the temporal response of the system with a finite difference time domain method and show a SP behavior for input fields higher than a critical value. We perform a semi-quantitative description of the self-pulsation by solving iteratively, in time domain, the Ikeda equation of an all-pass MRR presenting a nonlinear phase shift. For this system, the pulses have a period of 300 fs with a modulation factor of 0.3. This configuration could be applied as a source of continuous wave terahertz radiation or as an optical clock in highly integrated plasmonic circuits.

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“…The sign of the real part of the propagation constant b 1 for this solution describes the modal type, forward (positive phase velocity) or backward (negative phase velocity). Another alternative description [35,37] fixes the sign of b 1 (for instance b 1 [ 0) and relies on the corresponding sign of b 2 to determine the direction of propagation: z [ 0 (forward modes) or z\0 (backward modes) so that amplitude decays upon propagation. We will use the second description.…”

Section: Mode Calculationmentioning

confidence: 99%

Nonlinear Plasmonic Waveguides

Salgueiro

Kivshar

2015

Springer Series in Optical Sciences

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Recent results on plasmonic waveguides are summarized. After a brief introduction to motivate the use of plasmonic structures for optical integrated devices and to present the main characteristics and potential applications, the metal-dielectric-metal slot waveguide is studied. The way to calculate the complex modes, which are necessary for a proper modeling taking optical losses into account, is presented for the linear and nonlinear cases. This calculations are then used to obtain the dispersion curves and to show the way modes transform when losses go from negligible to realistic values. The calculation of nonlinear modes leads to the study of the power dispersion curves considering optical losses and to the comparison with the non lossy case. Also, the way to simulate the propagation of light in this structures, using the finite-difference time-domain technique is discussed. The last part of the text deals with specific devices: nonlinear directional couplers applied to optical power switching. Finally, the use of tapered waveguides for the directional coupler is proposed, as a way to avoid the negative effect of optical loss and to enhance the coupler performance.

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Backward and forward modes guided by metal-dielectric-metal plasmonic waveguides

Cited by 41 publications

References 20 publications

Guided Plasmon Modes of a Graphene-Coated Kerr Slab

Guided Plasmon Modes of a Graphene-Coated Kerr Slab

Self-Pulsation in a Nonlinear Plasmonic Ring Resonator

Nonlinear Plasmonic Waveguides

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