Subwavelength Silicon Photonics
Subwavelength Silicon Photonics
Subwavelength gratings refer to periodic structures that have a period less than half the wavelength of light in the material so that no Bragg diffraction mode is supported. Instead, the light will propagate as if it was in a homogeneous material with anisotropic refractive indices. Subwavelength gratings have attracted great interest recently, as they provide a useful degree of freedom for the crafting of the effective refractive index of the material in photonic devices. In this chapter, we will introduce some of the applications of subwavelength structures for silicon photonics devices. We start by introducing the background theory of subwavelength gratings and then discuss their applications for the engineering of waveguide grating couplers, suspended membrane devices for mid-infrared (mid-IR) wavelengths, and their use with numerical optimization techniques for optimizing photonic devices. We shall discuss the classic effective medium theory (EMT) for subwavelength gratings and show how EMT can reduce time-consuming three-dimensional (3D) numerical optimizations to an effective two-dimensional (2D) optimization problem.
Silicon Photonics, Grating, Waveguide
285-321
Tsang, Hon Ki
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Chen, Xia
64f6ab92-ca11-4489-8c03-52bc986209ae
Cheng, Zhenzhou
2804ce6b-a001-4421-adc5-7b970145524a
Zhou, W.
75430951-d86a-4e70-a666-6bbb3c49bca9
Tong, Yeyu
3f6ceefa-5909-44c0-8338-ee9fc4ee47a5
9 June 2021
Tsang, Hon Ki
7fd2ac9c-ef24-4fb4-9842-d536637170db
Chen, Xia
64f6ab92-ca11-4489-8c03-52bc986209ae
Cheng, Zhenzhou
2804ce6b-a001-4421-adc5-7b970145524a
Zhou, W.
75430951-d86a-4e70-a666-6bbb3c49bca9
Tong, Yeyu
3f6ceefa-5909-44c0-8338-ee9fc4ee47a5
Tsang, Hon Ki, Chen, Xia, Cheng, Zhenzhou, Zhou, W. and Tong, Yeyu
(2021)
Subwavelength Silicon Photonics.
In,
Lockwood, David J. and Pavesi, Lorenzo
(eds.)
Silicon Photonics IV: Topics in Applied Physics.
Springer, .
(doi:10.1007/978-3-030-68222-4_6).
Record type:
Book Section
Abstract
Subwavelength gratings refer to periodic structures that have a period less than half the wavelength of light in the material so that no Bragg diffraction mode is supported. Instead, the light will propagate as if it was in a homogeneous material with anisotropic refractive indices. Subwavelength gratings have attracted great interest recently, as they provide a useful degree of freedom for the crafting of the effective refractive index of the material in photonic devices. In this chapter, we will introduce some of the applications of subwavelength structures for silicon photonics devices. We start by introducing the background theory of subwavelength gratings and then discuss their applications for the engineering of waveguide grating couplers, suspended membrane devices for mid-infrared (mid-IR) wavelengths, and their use with numerical optimization techniques for optimizing photonic devices. We shall discuss the classic effective medium theory (EMT) for subwavelength gratings and show how EMT can reduce time-consuming three-dimensional (3D) numerical optimizations to an effective two-dimensional (2D) optimization problem.
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More information
Published date: 9 June 2021
Keywords:
Silicon Photonics, Grating, Waveguide
Identifiers
Local EPrints ID: 454867
URI: http://eprints.soton.ac.uk/id/eprint/454867
PURE UUID: 41bbe9bc-cece-4b49-83a3-16b177ebb374
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Date deposited: 28 Feb 2022 17:34
Last modified: 16 Mar 2024 15:56
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Contributors
Author:
Hon Ki Tsang
Author:
Xia Chen
Author:
Zhenzhou Cheng
Author:
W. Zhou
Author:
Yeyu Tong
Editor:
David J. Lockwood
Editor:
Lorenzo Pavesi
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