Journal ArticleDOI
Compact efficient broadband grating coupler for silicon-on-insulator waveguides.
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TLDR
A high-efficiency broadband grating coupler for coupling between silicon-on-insulator (SOI) waveguides and optical fibers and the size of the grooves is optimized numerically.Abstract:
We have designed a high-efficiency broadband grating coupler for coupling between silicon-on-insulator (SOI) waveguides and optical fibers. The grating is only 13 µm long and 12 µm wide, and the size of the grooves is optimized numerically. For TE polarization the coupling loss to single-mode fiber is below 1 dB over a 35-nm wavelength range when using SOI with a two-pair bottom reflector. The tolerances to fabrication errors are also calculated.read more
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Journal ArticleDOI
Unidirectional guided resonances in anisotropic waveguides.
TL;DR: In this paper, anisotropic planar anti-guiding waveguide structures with two radiation channels toward the surrounding cladding materials can support unidirectional guided resonances (UGRs), where radiation is canceled in one of the radiation channels and redirected into the other.
Nonlinear Applications using Silicon Nanophotonic Wires
TL;DR: Liu et al. as discussed by the authors investigated the effect of optical nonlinearity in silicon nanophotonic wires and its influence on the propagation of ultra-short optical pulses in such wires, and showed that silicon wires possess a remarkably large characteristic time associated with the self-steepening effect and optical-shock formation.
Design, Fabrication and Characterization of Inverse Adiabatic Fiber-To-Chip Couplers
Mohammad Araghchini,Marcus S. Dahlem,C.W. Holzwarth,Erich P. Ippen,Franz X. Kärtner,Anatol Khilo,Henry I. Smith +6 more
TL;DR: In this paper, an inverse-taper coupler between a fiber and a SiNx waveguide overclad with silicon oxide was fabricated, and 1.0 dB loss was measured for a 750 μm-long device with a low-index multimode waveguide designed to match a 4.0 μm fiber.
Proceedings ArticleDOI
Subwavelength-grating metamaterial integrated devices for the near- and mid-infrared wavelengths
Alejandro Sánchez-Postigo,J. Gonzalo Wangüemert-Pérez,Alejandro Ortega-Moñux,Robert Halir,Daniel Pereira-Martín,José Manuel Luque-González,Jens H. Schmid,Shurui Wang,Martin Vachon,Dan-Xia Xu,Jordi Soler-Penades,Milos Nedeljkovic,Goran Z. Mashanovich,Pavel Cheben,Íñigo Molina-Fernández +14 more
TL;DR: A wide range of integrated devices based on subwavelength grating (SWG) metamaterials have been demonstrated at telecom near-infrared bands, some with unprecedented performance.
Proceedings ArticleDOI
Performance of 2D-Grating couplers designed through full 3D-FDTD numerical simulations
Cosimo Lacava,Lee Carroll,Dario Gerace,Lucio Claudio Andreani,Maryse Fournier,S. Messaoudene,Nicola Pavarelli,Jun Su Lee,Peter O'Brien,Sylvie Menezo,Ilaria Cristiani +10 more
TL;DR: In this article, a new strategy based on a full 3D-FDTD (finite difference time domain) calculations has been proposed to describe 2D-GC operation, and optimize their performance.
References
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Journal Article
Electromagnetic Optimization by Genetic Algorithms
TL;DR: This book describes numerous applications of genetic algorithms to the design and optimization of various low- and high-frequency electromagnetic components and provides a comprehensive list of the up-to-date references applicable to electromagneticdesign problems.
Journal ArticleDOI
Ultra-low loss photonic integrated circuit with membrane-type photonic crystal waveguides
TL;DR: The combination of an efficient two-stage coupling scheme and utilization of ultra-long (up to 2mm) photonic crystal waveguides reduces the uncertainty in determining the loss figure to 3dB/cm.
Journal ArticleDOI
An out-of-plane grating coupler for efficient butt-coupling between compact planar waveguides and single-mode fibers
Dirk Taillaert,Wim Bogaerts,Peter Bienstman,Thomas F. Krauss,P. Van Daele,Ingrid Moerman,Steven Verstuyft,K. De Mesel,Roel Baets +8 more
TL;DR: In this paper, an out-of-plane coupler for butt-coupling from fiber to compact planar waveguides is proposed based on a short second-order grating or photonic crystal, etched in a waveguide with a low-index oxide cladding.
Journal ArticleDOI
Low loss mode size converter from 0.3 [micro sign]m square Si wire waveguides to singlemode fibres
TL;DR: In this article, a novel integrated mode size converter for single-mode Si wire waveguides is presented, which is constructed with two-dimensional tapered Si waveguide and overlaid high-index polymer waveguide.
Journal ArticleDOI
Optical modelling of photonic crystals and VCSELs using eigenmode expansion and perfectly matched layers
Peter Bienstman,Roel Baets +1 more
TL;DR: In this paper, a modeling approach for photonic crystal structures and vertical-cavity surface-emitting lasers (VCSELs) is presented based on vectorial eigenmode expansion combined with perfectly matched layer (PML) boundary conditions.