Switching power reduction in the ultra-compact Kerr nonlinear plasmonic directional coupler

Nozhat, Najmeh; Granpayeh, Nosrat

doi:10.1016/j.optcom.2011.11.110

Cited by 32 publications

(25 citation statements)

References 35 publications

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“…Several applications have already been proposed for NPSWs [7,8]. Nevertheless, the experimental observation of plasmonsoliton waves in these NPSWs is still lacking even if linear slot waveguides have already been fabricated [9].…”

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confidence: 99%

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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confidence: 99%

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

Elsawy

Renversez

2016

Opt. Lett.

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“…By solving the dispersion relation of SPP modes of two adjacent MIM waveguides, the propagation constants of SSP modes and so the coupling length as a function of the metal gap or dielectric thicknesses can be obtained. By the procedure described in [9], the coupling length of a PDC for the dielectric thickness of h=30nm and metal gap thickness of d=10nm, at the wavelength of 1550nm is attained to be 887nm, for the air dielectric. By increasing the refractive index of the dielectric region, the coupling length decreases.…”

Section: Resultsmentioning

confidence: 99%

“…To derive the values of these propagation constants and hence the coupling length, we need to obtain and solve the dispersion relation of the SPP modes of the double parallel metal-insultator-metal (MIM) waveguides [9]. Due to Kerr nonlinear effect, the refractive index of dielectric waveguide depends on s I and p I , respectively the signal and pump intensities as follows [11]: …”

Section: Numerical and Simulation Methodsmentioning

confidence: 99%

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Controlling the coupling ratio of the plasmonic directional couplers by SPM and XPM nonlinear effects

Nozhat

Granpayeh

2013

2013 21st Iranian Conference on Electrical Engineering (ICEE)

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In this paper, we have shown that by increasing the input power in a Kerr-type nonlinear plasmonic directional coupler (PDC), the bar coupling ratio can be controlled. In 3dB performance of the directional coupler, it has been shown that by utilizing the cross phase modulation (XPM) nonlinear effect the required pump power has been reduced significantly compared to the signal power with self phase modulation (SPM) effect.

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“…In order to improve the flexibility in tuning and controlling for such SPP devices, recently nonlinear Kerr media have been introduced into the SPP waveguide-cavity coupling structures [12]. The performances of various SPP devices based on the Kerr nonlinearity have been investigated theoretically [13][14][15] and experimentally [16,17]. Optical bistability, which is an important third-order optical nonlinear effect, has also been observed in different SPP waveguide-cavity structures [18,19], and even used for the design of all-optical bistable SPP switches [20,21].…”

Section: Introductionmentioning

confidence: 99%

Analytical theory for the nonlinear optical response of a Kerr-type standing-wave cavity side-coupling to a MIM waveguide

2013

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In this article, an analytical theory to describe the nonlinear dynamic response characteristics of a typical SPP waveguide-cavity structure formed by a Kerr-type standing-wave cavity side-coupling to a metal-insulator-metal (MIM) waveguide is proposed by combining the temporal coupled mode theory and the Kerr nonlinearity. With the analytical theory, the optical bistability with the hysteresis behavior is successfully predicted, and the optical bistability evolutions and its dynamic physical mechanism are also phenomenologically analyzed. Moreover, the influence of the quality factors Q₀ and Q₁ on the first-turnning point (FTP) power of optical bistability and the bistable region width, the approaches to decrease the FTP power and to broaden the bistable region are also discussed in detail with our analytical theory. This work can help us understand the physical mechanism of the nonlinear dynamical response at nanoscale, and may be useful to design nonlinear nanophotonic systems for applications in ultra-compact all-optical devices and storages.

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Switching power reduction in the ultra-compact Kerr nonlinear plasmonic directional coupler

Cited by 32 publications

References 35 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

Controlling the coupling ratio of the plasmonic directional couplers by SPM and XPM nonlinear effects

Analytical theory for the nonlinear optical response of a Kerr-type standing-wave cavity side-coupling to a MIM waveguide

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