Waveguiding in nanoscale metallic apertures

Collin, Stéphane; Pardo, Fabrice; Pélouard, Jean-Luc

doi:10.1364/oe.15.004310

Cited by 164 publications

(99 citation statements)

References 37 publications

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“…We considered a TM wave of wavelength λ 0 = 100 µm propagating through the planar structure consisted of w = 10.2 µm thick, undoped GaAs between infinitely thick Au plates. For such a simple case the analytical expression for the effective index is known (Collin 2007):…”

Section: The Resultsmentioning

confidence: 99%

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Theoretical investigation of metal–metal waveguides for terahertz quantum-cascade lasers

2014

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We report our theoretical investigations of metal-metal waveguides for terahertz quantum-cascade lasers. The device is considered as a planar, multilayer structure. The optical properties of constituent materials are calculated according to Drude-Lorenz model. The Helmholtz equation is solved numerically using transfer matrix method. We concentrate on selecting the proper metallic material for claddings to minimize the waveguide losses. In addition, we analyze the consequences of inserting Ti separation layers between claddings and semiconductor core for blocking the destructive diffusion of metals into the active layer and improving the adhesion.

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Section: The Resultsmentioning

confidence: 99%

“…On the other hand, the penetration depth of electromagnetic radiation into metals is usually much less than 100 nm (Collin 2007). These two facts allow us to consider claddings to be infinitely thick.…”

Section: (C) In Collin 2007)mentioning

confidence: 99%

Theoretical investigation of metal–metal waveguides for terahertz quantum-cascade lasers

2014

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“…dielectric waveguides. We thus start our discussion by analyzing optical losses of the fundamental plasmonic mode supported by a subwavelength rectangular air aperture in gold [21] depending on the aperture height and width, shown in Fig. 2(a).…”

Section: Design Of Subwavelength Plasmonic Waveguidesmentioning

confidence: 99%

Subwavelength Line Imaging Using Plasmonic Waveguides

Podoliak

Horák

Prangsma

et al. 2015

IEEE J. Quantum Electron.

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We investigate the subwavelength imaging capacity of a twodimensional fanned-out plasmonic waveguide array, formed by air channels surrounded by gold metal layers for operation at near-infrared wavelengths, via finite element simulations. High resolution is achieved on one side of the device by tapering down the channel width while simultaneously maintaining propagation losses of a few dB. On the other, low-resolution side, output couplers are designed to optimize coupling to free space and to minimize channel cross talk via surface plasmons. Point sources separated by λ/15 can still be clearly distinguished. Moreover, up two 90% of the power of a point dipole is coupled to the device. Applications are high-resolution linear detector arrays and, by operating the device in reverse, high-resolution optical writing.Index Terms-High-resolution imaging, plasmon waveguides, surface plasmons.

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“…So far, the V-groove, which is characterized by strong localization, relatively low dissipation, single mode operation, low loss, and high tolerance to structural imperfections, seems to be one of the best options for subwavelength guiding. Recently, some highly localized plasmonic waveguides, for example, nanoscale metallic gap [24,25], channel [26,27], and rectangular-hole structures [5,28], which are similar to metallic stripe line, slot line, and rectangular waveguide in microwave frequencies, have been proposed to guide and confine SPP modes in the optical frequencies. It is expected that such plasmonic waveguides will become a basic building block of future integrated nanophotonic devices with spatial dimensions below the diffraction limit.…”

Section: Introductionmentioning

confidence: 99%

Propagation Properties of the SPP Modes in Nanoscale Narrow Metallic Gap, Channel, and Hole Geometries

Kong¹,

Li²,

Wu³

et al. 2007

PIER

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Abstract-The propagation properties of surface plasmon polaritons (SPP) modes in nanoscale narrow metallic structures: gap, channel, and rectangular-hole waveguides, are analyzed by the complex effective dielectric constant approximation. The results show that all the SPP modes exist below the critical frequency where the real part of metal permittivity is negative unity. It is found that both cutoff frequency and cutoff height exist in channel waveguide and rectangularhole waveguide. The channel and rectangular-hole waveguides have different propagation properties at cutoffs due to their different cutoff conditions. Compared with the gap waveguide, the channel waveguide has shorter propagation length and better confinement when the operation frequency is near the critical frequency, but has longer propagation length and worse confinement when the operation frequency is far from the critical frequency. Among the three waveguides, the rectangular-hole waveguide has the best confinement factor and the shortest propagation length. The comprehensive analysis for the gap, channel, and rectangular-hole waveguides can provide some guidelines in the design of subwavelength optical devices.

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Waveguiding in nanoscale metallic apertures

Cited by 164 publications

References 37 publications

Theoretical investigation of metal–metal waveguides for terahertz quantum-cascade lasers

Theoretical investigation of metal–metal waveguides for terahertz quantum-cascade lasers

Subwavelength Line Imaging Using Plasmonic Waveguides

Propagation Properties of the SPP Modes in Nanoscale Narrow Metallic Gap, Channel, and Hole Geometries

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