Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/1348
Title: Differential evolution algorithm based photonic structure design: Numerical and experimental verification of subwavelength ? /5 focusing of light
Authors: Bor, E.
 Turduev, Mirbek
 Kurt, Hamza
200103
Keywords: Multiplexing
Waveguides
mode converter
Issue Date: Aug-2016
Publisher: Nature Publishing Group
Source: Bor, E., Turduev, M., & Kurt, H. (2016). Differential evolution algorithm based photonic structure design: numerical and experimental verification of subwavelength ?/5 focusing of light. Scientific reports, 6, 30871.
Abstract: Photonic structure designs based on optimization algorithms provide superior properties compared to those using intuition-basedapproaches. In the present study, we numerically and experimentally demonstrate subwavelength focusing of light using wavelength scale absorption-free dielectric scattering objects embedded in an air background. An optimization algorithm based on differential evolution integrated into the finite-difference time-domain method was applied to determine the locations of each circular dielectric object with a constant radius and refractive index. The multiobjective cost function defined inside the algorithm ensures strong focusing of light with low intensity side lobes. The temporal and spectral responses of the designed compact photonic structureprovided a beam spot size in air with a full width at half maximum value of 0.19?, where ? is the wavelength of light. The experiments were carried out in the microwave region to verify numerical findings, and very good agreement between the two approaches was found. The subwavelength light focusing is associated with a strong interference effect due to nonuniformly arranged scatterers and an irregular index gradient. Improving the focusing capability of optical elements by surpassing the diffraction limit of light is of paramount importance in optical imaging, lithography, data storage, and strong light-matter interaction. © The Author(s) 2016.
URI: https://www.nature.com/articles/srep30871
https://hdl.handle.net/20.500.11851/1348
ISSN: 20452322
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
Differential_HK.pdf1.73 MBAdobe PDFThumbnail
View/Open
Show full item record

CORE Recommender

SCOPUSTM   
Citations

21
checked on Sep 23, 2022

WEB OF SCIENCETM
Citations

24
checked on Sep 24, 2022

Page view(s)

10
checked on Dec 26, 2022

Download(s)

6
checked on Dec 26, 2022

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.