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Subwavelength-grating metamaterial structures for silicon photonic devices

Subwavelength-grating metamaterial structures for silicon photonic devices
Subwavelength-grating metamaterial structures for silicon photonic devices

Segmenting silicon waveguides at the subwavelength scale produce an equivalent homogenous material. The geometry of the waveguide segments provides precise control over modal confinement, effective index, dispersion and birefringence, thereby opening up new approaches to design devices with unprecedented performance. Indeed, with ever-improving lithographic technologies offering sub-100-nm patterning resolution in the silicon photonics platform, many practical devices based on subwavelength structures have been demonstrated in recent years. Subwavelength engineering has thus become an integral design tool in silicon photonics, and both fundamental understanding and novel applications are advancing rapidly. Here, we provide a comprehensive review of the state of the art in this field. We first cover the basics of subwavelength structures, and discuss substrate leakage, fabrication jitter, reduced backscatter, and engineering of material anisotropy. We then review recent applications including broadband waveguide couplers, high-sensitivity evanescent field sensors, low-loss devices for mid-infrared photonics, polarization management structures, spectral filters, and highly efficient fiber-to-chip couplers. We finally discuss the future prospects for subwavelength silicon structures and their impact on advanced device design.

Couplers, Dispersion, Fiber-to-chip coupler, filter, metamaterial, Metamaterials, mid-infrared, near-infrared, Optical waveguides, Photonics, polarization, Refractive index, sensor, Silicon, silicon photonics, subwavelength grating, waveguide, waveguide coupler
0018-9219
1-14
Halir, Robert
e3f8d90b-0067-4e1a-a6b1-0217c342dd55
Ortega-Monux, Alejandro
2187ad4e-6b90-4354-83ce-da964b85e0fe
Benedikovic, Daniel
1ae5b7b3-770d-4919-8581-f37180e9d830
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Wanguemert-Perez, J. Gonzalo
28f10fc0-17b9-44f0-bad0-dab421273c95
Schmid, Jens H.
de954bee-9975-423f-8e10-0d35a4759f02
Molina-Fernandez, Inigo
e7b4acfd-266a-410b-b4b6-1a9c482c77a0
Cheben, Pavel
ab8ffd13-bc5c-44cb-88ed-605e3c347848
Halir, Robert
e3f8d90b-0067-4e1a-a6b1-0217c342dd55
Ortega-Monux, Alejandro
2187ad4e-6b90-4354-83ce-da964b85e0fe
Benedikovic, Daniel
1ae5b7b3-770d-4919-8581-f37180e9d830
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Wanguemert-Perez, J. Gonzalo
28f10fc0-17b9-44f0-bad0-dab421273c95
Schmid, Jens H.
de954bee-9975-423f-8e10-0d35a4759f02
Molina-Fernandez, Inigo
e7b4acfd-266a-410b-b4b6-1a9c482c77a0
Cheben, Pavel
ab8ffd13-bc5c-44cb-88ed-605e3c347848

Halir, Robert, Ortega-Monux, Alejandro, Benedikovic, Daniel, Mashanovich, Goran Z., Wanguemert-Perez, J. Gonzalo, Schmid, Jens H., Molina-Fernandez, Inigo and Cheben, Pavel (2018) Subwavelength-grating metamaterial structures for silicon photonic devices. Proceedings of the IEEE, 1-14. (doi:10.1109/JPROC.2018.2851614).

Record type: Article

Abstract

Segmenting silicon waveguides at the subwavelength scale produce an equivalent homogenous material. The geometry of the waveguide segments provides precise control over modal confinement, effective index, dispersion and birefringence, thereby opening up new approaches to design devices with unprecedented performance. Indeed, with ever-improving lithographic technologies offering sub-100-nm patterning resolution in the silicon photonics platform, many practical devices based on subwavelength structures have been demonstrated in recent years. Subwavelength engineering has thus become an integral design tool in silicon photonics, and both fundamental understanding and novel applications are advancing rapidly. Here, we provide a comprehensive review of the state of the art in this field. We first cover the basics of subwavelength structures, and discuss substrate leakage, fabrication jitter, reduced backscatter, and engineering of material anisotropy. We then review recent applications including broadband waveguide couplers, high-sensitivity evanescent field sensors, low-loss devices for mid-infrared photonics, polarization management structures, spectral filters, and highly efficient fiber-to-chip couplers. We finally discuss the future prospects for subwavelength silicon structures and their impact on advanced device design.

Text
08424820 - Accepted Manuscript
Available under License Creative Commons Attribution.
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More information

Accepted/In Press date: 21 June 2018
e-pub ahead of print date: 3 August 2018
Keywords: Couplers, Dispersion, Fiber-to-chip coupler, filter, metamaterial, Metamaterials, mid-infrared, near-infrared, Optical waveguides, Photonics, polarization, Refractive index, sensor, Silicon, silicon photonics, subwavelength grating, waveguide, waveguide coupler

Identifiers

Local EPrints ID: 423041
URI: https://eprints.soton.ac.uk/id/eprint/423041
ISSN: 0018-9219
PURE UUID: c70a378f-92cb-478c-a937-d3c7c9401b1a

Catalogue record

Date deposited: 13 Aug 2018 16:30
Last modified: 09 Dec 2019 18:00

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Contributors

Author: Robert Halir
Author: Alejandro Ortega-Monux
Author: Daniel Benedikovic
Author: J. Gonzalo Wanguemert-Perez
Author: Jens H. Schmid
Author: Inigo Molina-Fernandez
Author: Pavel Cheben

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