Focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces

Qiuhang Zhong; Venkat Veerasubramanian; Yun Wang; Wei Shi; David Patel; Samir Ghosh; Alireza Samani; Lukas Chrostowski; Richard Bojko; David V. Plant

doi:10.1364/OE.22.018224

Focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces

Qiuhang Zhong
, Venkat Veerasubramanian
, Yun Wang
, Wei Shi
, David Patel
, Samir Ghosh
, Alireza Samani
, Lukas Chrostowski
, Richard Bojko
, David V. Plant

Research output: Contribution to journal › Article › peer-review

Abstract

We report on the design and characterization of focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces. With implementation of waveguide dispersion engineered subwavelength structures, an ultra-wide 1-dB bandwidth of over 100 nm (largest reported to date) near 1550 nm is experimentally achieved for transverse-electric polarized light. By tapering the subwavelength structures, back reflection is effectively suppressed and grating coupling efficiency is increased to -4.7 dB. A compact device footprint of 40 μm × 20 μm is realized by curving the gratings in a focusing scheme.

Original language	English
Pages (from-to)	18224-18231
Number of pages	8
Journal	Optics Express
Volume	22
Issue number	15
DOIs	https://doi.org/10.1364/OE.22.018224
Publication status	Published - 2014
Externally published	Yes

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title = "Focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces",

abstract = "We report on the design and characterization of focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces. With implementation of waveguide dispersion engineered subwavelength structures, an ultra-wide 1-dB bandwidth of over 100 nm (largest reported to date) near 1550 nm is experimentally achieved for transverse-electric polarized light. By tapering the subwavelength structures, back reflection is effectively suppressed and grating coupling efficiency is increased to -4.7 dB. A compact device footprint of 40 μm × 20 μm is realized by curving the gratings in a focusing scheme.",

author = "Qiuhang Zhong and Venkat Veerasubramanian and Yun Wang and Wei Shi and David Patel and Samir Ghosh and Alireza Samani and Lukas Chrostowski and Richard Bojko and Plant, \{David V.\}",

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doi = "10.1364/OE.22.018224",

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T1 - Focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces

AU - Zhong, Qiuhang

AU - Veerasubramanian, Venkat

AU - Wang, Yun

AU - Shi, Wei

AU - Patel, David

AU - Ghosh, Samir

AU - Samani, Alireza

AU - Chrostowski, Lukas

AU - Bojko, Richard

AU - Plant, David V.

PY - 2014

Y1 - 2014

N2 - We report on the design and characterization of focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces. With implementation of waveguide dispersion engineered subwavelength structures, an ultra-wide 1-dB bandwidth of over 100 nm (largest reported to date) near 1550 nm is experimentally achieved for transverse-electric polarized light. By tapering the subwavelength structures, back reflection is effectively suppressed and grating coupling efficiency is increased to -4.7 dB. A compact device footprint of 40 μm × 20 μm is realized by curving the gratings in a focusing scheme.

AB - We report on the design and characterization of focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces. With implementation of waveguide dispersion engineered subwavelength structures, an ultra-wide 1-dB bandwidth of over 100 nm (largest reported to date) near 1550 nm is experimentally achieved for transverse-electric polarized light. By tapering the subwavelength structures, back reflection is effectively suppressed and grating coupling efficiency is increased to -4.7 dB. A compact device footprint of 40 μm × 20 μm is realized by curving the gratings in a focusing scheme.

UR - https://www.scopus.com/pages/publications/84905378377

U2 - 10.1364/OE.22.018224

DO - 10.1364/OE.22.018224

M3 - Article

AN - SCOPUS:84905378377

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SP - 18224

EP - 18231

JO - Optics Express

JF - Optics Express

IS - 15

ER -

Focusing-curved subwavelength grating couplers for ultra-broadband silicon photonics optical interfaces

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