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
Citations
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Journal ArticleDOI
Ultra-broadband 16-channel mode division (de)multiplexer utilizing densely packed bent waveguide arrays.
Hongnan Xu,Yaocheng Shi +1 more
TL;DR: An ultra-broadband 16-channel mode division (de)multiplexer utilizing densely packed bent waveguide arrays (DPBWAs) utilizing denselypacked bent waveguides (DP BWAs) is demonstrated.
Journal ArticleDOI
High efficiency diffractive grating coupler based on transferred silicon nanomembrane overlay on photonic waveguide
Tapas Kumar Saha,Weidong Zhou +1 more
TL;DR: In this paper, a new type of high efficiency grating coupler based on single crystalline Si nanomembrane overlay and stacking was designed for the purpose of coupling light between single mode fibres and nanophotonic waveguides, and for the coupling between multiple photonic interconnect layers for compact three-dimensional vertical integration.
Proceedings ArticleDOI
High Directivity, Vertical Fiber-to-Chip Coupler with Anisotropically Radiating Grating Teeth
TL;DR: In this paper, an efficient vertical grating-coupler design was proposed that allows near 50:1 up/down directivity using only two lithographic layers, without top/bottom mirrors, in high-index-contrast silicon waveguides.
Journal Article
Spectral splitting with a plasmonic nanowire on silicon chip
Ru-Wen Peng,Qing Hu,Di-Hu Xu,Yu Zhou,Ren-Hao Fan,Nicholas X. Fang,Qianjin Wang,Xianrong Huang,Mu Wang +8 more
TL;DR: By cascading nano-corrugation gratings with different periodicities on silver nanowires atop silicon, different colors can be spatially separated and chronologically released at different grating junctions, and this study provides a new and promising approach for realizing spatiotemporal-sensitive spectral splitting and optical signal processing on nanoscales.
Journal ArticleDOI
Ultra-compact polarization-independent directional couplers utilizing a subwavelength structure.
Hongnan Xu,Yaocheng Shi +1 more
TL;DR: Ultra-compact polarization-independent directional couplers are proposed and demonstrated on the silicon-on-insulator (SOI) platform by using the subwavelength structure in the coupling region, so that the coupling strength could be equivalent between TE and TM polarizations.
References
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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.