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
Planar surface implanted diffractive grating couplers in SOI.
R. Topley,Liam O'Faolain,David J. Thomson,Frederic Y. Gardes,Goran Z. Mashanovich,Graham T. Reed +5 more
TL;DR: Simulations show 44% of the power can be extracted from the waveguide by using uniform implanted gratings, which is not dissimilar to the performance of typical uniform surface relief gratings currently used.
Journal ArticleDOI
Ultrathin Silicon-on-Insulator Grating Couplers
Li He,Yanling He,Andrew Pomerene,Craig M. Hill,Stewart Ocheltree,Tom Baehr-Jones,Michael Hochberg +6 more
TL;DR: In this article, a grating coupler fabricated on a silicon-on-insulator (SOI) wafer operating at 1550 nm, based on an ultrathin 50-nm silicon geometry, is presented.
Journal ArticleDOI
Metasurface-Integrated Photonic Platform for Versatile Free-Space Beam Projection with Polarization Control.
Alexander Yulaev,Alexander Yulaev,Wenqi Zhu,Wenqi Zhu,Cheng Zhang,Cheng Zhang,Daron A. Westly,Henri J. Lezec,Amit Agrawal,Amit Agrawal,Vladimir A. Aksyuk +10 more
TL;DR: By integrating a dielectric metasurface with an extreme photonic mode converter, this work creates a versatile nanophotonic platform for efficient coupling to arbitrary-defined free-space radiation of 780 nm wavelength with well-controlled spatially-dependent polarization, phase, and intensity.
DissertationDOI
Laser Cooling of an Optomechanical Crystal Resonator to Its Quantum Ground State of Motion
TL;DR: In this paper, the authors describe the first optical and all-optical experimental setup to simultaneously satisfy these conditions, realizing the quantum ground state cooling of a 3.7 GHz mechanical mode (with a final phonon occupation of 0.85 +/- 0.08).
Proceedings ArticleDOI
Compact and low-loss 8×8 silicon photonic switch module for transponder aggregators in CDC-ROADM application
Shigeru Nakamura,Shigeyuki Yanagimachi,Hitoshi Takeshita,Akio Tajima,Tomoaki Kato,Tomoyuki Hino,Kiyoshi Fukuchi +6 more
TL;DR: 8×8 silicon photonic switch modules with newly designed spot size converters on a silicon chip with averaged module excess loss as low as 7.2 dB on all 64 paths is achieved.
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.