Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.11851/2733
Title: | Analytical, Numerical, and Experimental Investigation of a Luneburg Lens System for Directional Cloaking | Authors: | Babayiğit, Ceren Evren, Aydın S. Bor, Emre Kurt, Hamza Turduev, Mirbek |
Keywords: | Metamaterials optics carpet cloak |
Publisher: | American Physical Society | Source: | Babayiğit, C., Evren, A. S., Bor, E., Kurt, H., and Turduev, M. (2019). Analytical, numerical, and experimental investigation of a Luneburg lens system for directional cloaking. Physical Review A, 99(4), 043831. | Abstract: | In this study, the design of a directional cloaking based on the Luneburg lens system is proposed and its operating principle is experimentally verified. The cloaking concept is analytically investigated via geometrical optics and numerically realized with the help of the finite-difference time-domain method. In order to benefit from its unique focusing and/or collimating characteristics of light, the Luneburg lens is used. We show that by the proper combination of Luneburg lenses in an array form, incident light bypasses the region between junctions of the lenses, i.e., the "dark zone." Hence, direct interaction of an object with propagating light is prevented if one places the object to be cloaked inside that dark zone. This effect is used for hiding an object which is made of a perfectly electric conductor material. In order to design an implementable cloaking device, the Luneburg lens is discretized into a photonic crystal structure having gradually varying air cylindrical holes in a dielectric material by using Maxwell Garnett effective medium approximations. Experimental verifications of the designed cloaking structure are performed at microwave frequencies of around 8 GHz. The proposed structure is fabricated by three-dimensional printing of dielectric polylactide material and a brass metallic alloy is utilized in place of the perfectly electric conductor material in microwave experiments. Good agreement between numerical and experimental results is found. © 2019 American Physical Society. | URI: | https://hdl.handle.net/20.500.11851/2733 https://journals.aps.org/pra/abstract/10.1103/PhysRevA.99.043831 |
ISSN: | 24699926 |
Appears in Collections: | Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Kurt-Analytical.pdf | 4.41 MB | Adobe PDF | View/Open |
CORE Recommender
SCOPUSTM
Citations
5
checked on Dec 21, 2024
WEB OF SCIENCETM
Citations
14
checked on Nov 9, 2024
Page view(s)
154
checked on Dec 23, 2024
Download(s)
40
checked on Dec 23, 2024
Google ScholarTM
Check
Altmetric
Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.