Simulation of complex plasmonic circuits including bends

Dellagiacoma, Claudio; Lasser, Theo; Martin, Olivier J. F.; Degiron, Aloyse; Mock, Jack J.; Smith, David R.

doi:10.1364/oe.19.018979

Cited by 12 publications

(6 citation statements)

References 45 publications

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“…In the last decade, important advances have been made in fabricating noble-metal based devices for surface plasmon based bio-sensing [1], solar energy harvesting [2], plasmonic circuits [3,4], as well as for the design of novel metamaterials [5][6][7]. These devices rely on exploiting the negative permittivity of noble-metals in nanoscale systems for appropriate plasmonic and optical applications, and the ability to design these devices requires an intimate knowledge of the constituent metals' optical permittivity [8].…”

Section: Introductionmentioning

confidence: 99%

Size-dependent permittivity and intrinsic optical anisotropy of nanometric gold thin films: a density functional theory study

Laref¹,

Cao²,

Asaduzzaman³

et al. 2013

Opt. Express

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Physical properties of materials are known to be different from the bulk at the nanometer scale. In this context, the dependence of optical properties of nanometric gold thin films with respect to film thickness is studied using density functional theory (DFT). We find that the in-plane plasma frequency of the gold thin film decreases with decreasing thickness and that the optical permittivity tensor is highly anisotropic as well as thickness dependent. Quantitative knowledge of planar metal film permittivity's thickness dependence can improve the accuracy and reliability of the designs of plasmonic devices and electromagnetic metamaterials. The strong anisotropy observed may become an alternative method of realizing indefinite media.

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Section: Introductionmentioning

confidence: 99%

Size-dependent permittivity and intrinsic optical anisotropy of nanometric gold thin films: a density functional theory study

Laref¹,

Cao²,

Asaduzzaman³

et al. 2013

Opt. Express

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“…The primary design of a high-index GaAs curved waveguide with n GaAS = 3.4 is capable of strong light confinement over a wide RI range. A width and a radius of curvature for the curved waveguide were determined by a conformal transformation 18 and the Helmholtz equation to optimize bending losses 19 . The optimal width and the radius of the curved single mode waveguide are w = 0.25 μm and Rc = 5 μm.…”

Section: Resultsmentioning

confidence: 99%

A plasmonic refractive index sensor with an ultrabroad dynamic sensing range

Cheng

Chang

Chuang

et al. 2019

Sci Rep

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Refractive index sensors based on surface plasmon resonance (SPR) promise to deliver high sensitivities. However, these sensitivities depend on the derivative of the monitored SPR parameters near resonance, so this dependency leads to a relatively narrow detection range for refractive index changes. Herein, we introduce an idea to improve the detection range refractive index through a high-contrast-index curved waveguide surrounded with an outer gold ring. The proposed detection technique, based on the output power measurement of the curved waveguide, offers a linear response over an ultrabroad range of the refractive index for a surrounding medium from n = 1 to 2.36. Meanwhile, an theoretically ultrahigh refractive index resolution (RIU) of 4.53 × 10−10 could be accessible for such a broad testing range, available for both gas and aqueous chemical sample refractive indices Furthermore, the power detection approach enables an integrated photodetector for a lab-on-chip sensor platform, revealing a high potential for a multifunctional, compact, and highly sensitive sensor-on-chip device.

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“…Although both works successfully resolved the mode mismatch problem in the bend structure, there are still limitations to reducing the footprint for high integration. This led to explorations into noncircular bends such as Euler bends 8 , hybrid bends 9 , plasmonic bends 10 and photonic crystals-based bends 11,12,13 . These bends provide non-uniform curvature for efficient light transmission, however, are not suitable for ultracompact bends with miniaturized radii.…”

Section: Introductionmentioning

confidence: 99%

Ultra-compact and efficient photonic waveguide bends with different configurations designed by topology optimization

Irfan,

Kim,

Kurt

2023

Preprint

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Transporting light signals over the corners and sharp bends imposes high optical loss and distortion on the mode profiles. Usually, bends with larger radii are used in circuits to minimize the loss over transmission, resulting in a severe limitation in integration density. In this paper, we propose novel topology-optimized L-bend and U-bend structures designed for a 220 nm silicon-on-insulator (SOI) platform. Optimized L-bends with footprints of 2.5 µm×2.5 µm, 1.5 µm×1.5 µm, and 1 µm×1 µm show maximum insertion losses of only 0.07 dB, 0.26 dB, and 0.78 dB, respectively. For optimized U-bends with footprints of 3 µm×3.6 µm, 2.5 µm×2.5 µm, and 1.5 µm×1.5 µm, the maximum insertion losses are 0.07 dB, 0.21 dB, and 3.16 dB. These optimized bends reduce the maximum insertion loss by over 50% compared to un-optimized arc-type bends across a broad wavelength range of 1450–1650 nm. Experimental verification of a meander line with 16 optimized U-bends (3 µm×3.6 µm) demonstrates a 1.46 dB transmission at 1550 nm, agreeing with simulated results and indicating a high potential of loss reduction with optimized bends.

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Simulation of complex plasmonic circuits including bends

Cited by 12 publications

References 45 publications

Size-dependent permittivity and intrinsic optical anisotropy of nanometric gold thin films: a density functional theory study

Size-dependent permittivity and intrinsic optical anisotropy of nanometric gold thin films: a density functional theory study

A plasmonic refractive index sensor with an ultrabroad dynamic sensing range

Ultra-compact and efficient photonic waveguide bends with different configurations designed by topology optimization

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