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Reflectionless tilted grating couplers with improved coupling efficiency based on a silicon overlay

Yanlu Li UGent, Lianyan Li, Bin Tian, Günther Roelkens UGent and Roel Baets UGent (2013) IEEE PHOTONICS TECHNOLOGY LETTERS. 25(13). p.1195-1198
abstract
Grating couplers are important photonic devices on a complementary metal-oxide-semiconductor compatible silicon-on-insulator platform to couple light between optical waveguides and free space optical components or fibers. In this letter, we report the combination of a tilted grating coupler design, which strongly suppresses the back-reflection for light incident on the grating coupler from a waveguide, and a silicon overlay locally deposited on top of the grating region, which enhances the coupling efficiency of the grating coupler, by means of simulation and experiment. The fabricated tilted focusing grating couplers with silicon overlay show a coupling efficiency of -2.2 dB in combination with a back-reflection of around -40 dB when excited from the silicon waveguide. The tilted design also provides an alternative approach to enhance the transmission of a grating coupler when the thickness of the Si overlay is not optimized.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
coupling efficiency, back-reflection, Tilted grating coupler, BACKREFLECTION, WAVE-GUIDES, INTEGRATED-CIRCUITS, ON-INSULATOR
journal title
IEEE PHOTONICS TECHNOLOGY LETTERS
IEEE Photonics Technol. Lett.
volume
25
issue
13
pages
1195 - 1198
Web of Science type
Article
Web of Science id
000320666200001
JCR category
ENGINEERING, ELECTRICAL & ELECTRONIC
JCR impact factor
2.176 (2013)
JCR rank
54/248 (2013)
JCR quartile
1 (2013)
ISSN
1041-1135
DOI
10.1109/LPT.2013.2261484
project
Center for nano- and biophotonics (NB-Photonics)
language
English
UGent publication?
yes
classification
A1
copyright statement
I don't know the status of the copyright for this publication
id
4195046
handle
http://hdl.handle.net/1854/LU-4195046
date created
2013-12-03 16:16:30
date last changed
2016-12-19 15:45:11
@article{4195046,
  abstract     = {Grating couplers are important photonic devices on a complementary metal-oxide-semiconductor compatible silicon-on-insulator platform to couple light between optical waveguides and free space optical components or fibers. In this letter, we report the combination of a tilted grating coupler design, which strongly suppresses the back-reflection for light incident on the grating coupler from a waveguide, and a silicon overlay locally deposited on top of the grating region, which enhances the coupling efficiency of the grating coupler, by means of simulation and experiment. The fabricated tilted focusing grating couplers with silicon overlay show a coupling efficiency of -2.2 dB in combination with a back-reflection of around -40 dB when excited from the silicon waveguide. The tilted design also provides an alternative approach to enhance the transmission of a grating coupler when the thickness of the Si overlay is not optimized.},
  author       = {Li, Yanlu and Li, Lianyan and Tian, Bin and Roelkens, G{\"u}nther and Baets, Roel},
  issn         = {1041-1135},
  journal      = {IEEE PHOTONICS TECHNOLOGY LETTERS},
  keyword      = {coupling efficiency,back-reflection,Tilted grating coupler,BACKREFLECTION,WAVE-GUIDES,INTEGRATED-CIRCUITS,ON-INSULATOR},
  language     = {eng},
  number       = {13},
  pages        = {1195--1198},
  title        = {Reflectionless tilted grating couplers with improved coupling efficiency based on a silicon overlay},
  url          = {http://dx.doi.org/10.1109/LPT.2013.2261484},
  volume       = {25},
  year         = {2013},
}

Chicago
Li, Yanlu, Lianyan Li, Bin Tian, Günther Roelkens, and Roel Baets. 2013. “Reflectionless Tilted Grating Couplers with Improved Coupling Efficiency Based on a Silicon Overlay.” Ieee Photonics Technology Letters 25 (13): 1195–1198.
APA
Li, Yanlu, Li, L., Tian, B., Roelkens, G., & Baets, R. (2013). Reflectionless tilted grating couplers with improved coupling efficiency based on a silicon overlay. IEEE PHOTONICS TECHNOLOGY LETTERS, 25(13), 1195–1198.
Vancouver
1.
Li Y, Li L, Tian B, Roelkens G, Baets R. Reflectionless tilted grating couplers with improved coupling efficiency based on a silicon overlay. IEEE PHOTONICS TECHNOLOGY LETTERS. 2013;25(13):1195–8.
MLA
Li, Yanlu, Lianyan Li, Bin Tian, et al. “Reflectionless Tilted Grating Couplers with Improved Coupling Efficiency Based on a Silicon Overlay.” IEEE PHOTONICS TECHNOLOGY LETTERS 25.13 (2013): 1195–1198. Print.