Topology-Optimized Slow-Light Couplers for Ring-Shaped Photonic Crystal Waveguide

Pu, Minhao; Yang, Lirong; Frandsen, Lars Hagedorn; Jensen, Jakob Søndergaard; Sigmund, Ole; Ou, Haiyan; Yvind, Kresten; Hvam, Jørn Märcher

doi:10.1364/nfoec.2010.jwa30

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…The optimized structures usually have very weird shapes [166]. Setting some constraints on the geometrical size of the fine features one can design an efficient coupler that is reasonable for fabrication [167].…”

Section: Topology Optimizationmentioning

confidence: 99%

Nanocouplers for Infrared and Visible Light

Andryieuski

Lavrinenko

2012

Advances in OptoElectronics

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An efficient and compact coupler -a device that matches a micro-waveguide and a nano-waveguide -is an essential component for practical applications of nanophotonic systems. The number of coupling approaches has been rapidly increasing in the past ten years with the help of plasmonic structures and metamaterials. In this paper we overview recent as well as common solutions for nanocoupling. More specifically we consider the physical principles of operation of the devices based on a tapered waveguide section, a direct coupler, a lens and a scatterer and support them with a number of examples.Nevertheless, the problem is not only to create efficient waveguides that provide subwavelength mode confinement, but also to make an efficient interface between free space or an optical fiber and a subwavelength nanowaveguide, that is to focus light and launch it efficiently into the waveguide. The artistic view of the situation is depicted in Fig. 1. Trying to pour water from a big bowl into a bottle with a narrow bottleneck, one would waste a lot. However, usage of a funnel simplifies the task and increases the efficiency significantly. An optical coupler plays the role of a funnel for light.

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Section: Topology Optimizationmentioning

confidence: 99%

Nanocouplers for Infrared and Visible Light

Andryieuski

Lavrinenko

2012

Advances in OptoElectronics

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“…The modal mismatch between these different types of PhC lattices decreases coupling efficiency. There have been variety of methods proposed to couple a channel waveguide to PhC waveguide such as butt-coupling [7,8], mode-field matching [9][10][11], anti-reflection layer [12], semi-adiabatic coupler [13], topology optimization [14,15]. However, few methods have been introduced to couple different PhC waveguides to each other such as inverse optimization [5] and resonant cavities [6] methods.…”

Section: Introductionmentioning

confidence: 99%

Maxwell’s fisheye lens as efficient power coupler between dissimilar photonic crystal waveguides

Badri

Gilarlue

2019

Optik

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The imaging properties of the Maxwell's fisheye (MFE) lens makes it a viable candidate to implement power coupling between different types of waveguides. A coupler based on the MFE lens is designed to couple a square lattice photonic crystal to a triangular lattice one. The MFE lens is implemented as ring-based multilayer and graded photonic crystal (GPC) structures. The performance of the ring-based MFE lens is better than the GPC-based one in the C-band of optical communication. The proposed ring-based MFE coupler has a footprint of 3.623.62 m m    and covers the entire C and U bands. The S and L bands are partially covered. The average insertion loss of 0.1dB and the maximum return loss of -11dB in the C-band is achieved.

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Photonic crystal channel drop filter based on ring-shaped defects for DWDM systems

Dideban

Habibiyan

Ghafoorifard

2017

Physica E: Low-dimensional Systems and Nanostructures

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Topology-Optimized Slow-Light Couplers for Ring-Shaped Photonic Crystal Waveguide

Abstract: Abstract:We demonstrate a topology-optimized coupler for a ring-shaped photonic crystal waveguide to improve the coupling of light located in the slow-light regime. An enhancement of the coupling efficiency of up to 2.5dB is experimentally demonstrated.

Cited by 5 publications

References 10 publications

Nanocouplers for Infrared and Visible Light

Nanocouplers for Infrared and Visible Light

Maxwell’s fisheye lens as efficient power coupler between dissimilar photonic crystal waveguides

Photonic crystal channel drop filter based on ring-shaped defects for DWDM systems

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