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We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considering a 260 nm Si-thick Silicon-on-insulator platform, we numerically demonstrated a coupling efficiency of -0.8 dB (83%), well matching the experimental value of -0.9 dB (81%). Thanks to the optimized design, these results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector.

High-efficiency grating-couplers: demonstration of a new design strategy

Marchetti, Riccardo;Lacava, Cosimo
;Cristiani, Ilaria;Minzioni, Paolo
2017-01-01

Abstract

We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considering a 260 nm Si-thick Silicon-on-insulator platform, we numerically demonstrated a coupling efficiency of -0.8 dB (83%), well matching the experimental value of -0.9 dB (81%). Thanks to the optimized design, these results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector.
2017
Applied Physics/Condensed Matter/Materials Science encompasses the resources of three related disciplines: Applied Physics, Condensed Matter Physics, and Materials Science. The applied physics resources are concerned with the applications of topics in condensed matter as well as optics, vacuum science, lasers, electronics, cryogenics, magnets and magnetism, acoustical physics and mechanics. The condensed matter physics resources are concerned with the study of the structure and the thermal, mechanical, electrical, magnetic and optical properties of condensed matter. They include superconductivity, surfaces, interfaces, thin films, dielectrics, ferroelectrics and semiconductors. The materials science resources are concerned with the physics and chemistry of materials and include ceramics, composites, alloys, metals and metallurgy, nanotechnology, nuclear materials, adhesion and adhesives. Resources dealing with polymeric materials are listed in the Organic Chemistry/Polymer Science category.
Optics & Acoustics includes resources concerned with light, its genesis and propagation, and the effects that it undergoes and produces. This category also covers the production, transmission, and effects of sound, including general acoustics, linear and non-linear acoustics, atmospheric and underwater sound, mechanical vibrations, shock, and noise and its effects.
The Electrical and Electronics Engineering category covers resources concerned with applications of electricity, generally those involving current flow through conductors, as in motors and generators. This category also covers the examination of the conduction of electricity through gases or a vacuum as well as through semiconducting materials. Topics include image and signal processing, electromagnetics, electronic components and materials, microwave technology, and microelectronics.
SCIENTIFIC REPORTS
sì
WOS:000416891400072
2-s2.0-85036614281
Esperti anonimi
Inglese
Internazionale
ELETTRONICO
7
1
16670
29192215
https://www.nature.com/articles/s41598-017-16505-z
sì
9
info:eu-repo/semantics/article
262
Marchetti, Riccardo; Lacava, Cosimo; Khokhar, Ali; Chen, Xia; Cristiani, Ilaria; Richardson, David J; Reed, Graham T; Petropoulos, Periklis; Minzioni,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/1206486
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