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Optimization and experimental validation of a bi-focal lens in the microwave domain

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journal contribution
posted on 2022-02-04, 09:34 authored by Benjamin Vial, Tom WhittakerTom Whittaker, Shiyu Zhang, William WhittowWilliam Whittow, Yang Hao
The design of photonic devices is usually done through analytical modeling or variation in geometry and material parameters to obtain the required functionalities. Here, we report the use of topology optimization to obtain a bi-focal lens that concentrates the electromagnetic field at different spatial positions depending on the wavelength. Numerical inverse design is carried out to obtain the permittivity layout, satisfying this objective. The resulting device is then 3D printed using two low-loss dielectrics, and experimental field mapping at microwaves demonstrates the ability to enhance the field locally at distinct locations for two separate frequencies.

Funding

SYnthesizing 3D METAmaterials for RF, microwave and THz applications (SYMETA)

Engineering and Physical Sciences Research Council

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SOFTWARE DEFINED MATERIALS FOR DYNAMIC CONTROL OF ELECTROMAGNETIC WAVES (ANIMATE)

Engineering and Physical Sciences Research Council

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History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

AIP Advances

Volume

12

Issue

2

Publisher

AIP Publishing

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by AIP Publishing under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

2022-01-13

Publication date

2022-02-02

Copyright date

2022

eISSN

2158-3226

Language

  • en

Depositor

Prof Will Whittow. Deposit date: 3 February 2022

Article number

025103

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