Institutional Repository

Broadband and polarization-independent asymmetric transmission of visible light through a three-dimensional trapezoidal metallic metasurface

Show simple item record

dc.contributor.author Özer, Ahmet
dc.contributor.author Koçer, Hasan Erdinç
dc.contributor.author Kurt, Hamza
dc.date.accessioned 2019-03-19T12:16:22Z
dc.date.available 2019-03-19T12:16:22Z
dc.date.issued 2018-09-01
dc.identifier.citation Ozer, A., Kocer, H., & Kurt, H. (2018). Broadband and polarization-independent asymmetric transmission of visible light through a three-dimensional trapezoidal metallic metasurface. JOSA B, 35(9), 2111-2117.
dc.identifier.uri https://doi.org/10.1364/JOSAB.35.002111
dc.identifier.uri http://hdl.handle.net/20.500.11851/771
dc.description.abstract In modern optical applications, it has become an important need to flow light unidirectionally. An optical diode realizes this task as an electrical counterpart manipulates the flow of electrons in semiconductor materials. In this study, we show a broadband and polarization-independent optical diode-like mechanism in a metasurface configuration in the visible spectrum. The approach is passive such that the operating principle does not depend on any type of external biasing scheme. The constituted metasurface composed of a periodic type three-dimensional nanoarray of trapezoidal-shaped aluminum metal on a sapphire substrate is designed to produce the desired optical response for opposite directions of illumination. The optical transmission properties were systematically investigated using finite-difference time-domain computations. The asymmetric transmission frequency interval of the designed metasurface is associated with the Wood–Rayleigh anomaly, and the physical principle lies in the generation of the different number of higher order modes upon oppositely incident light. Our design has forward transmission of greater than 50%, backward transmission of less than 28%, and contrast ratio of greater than 3 dB in the entire visible spectrum. Specifically, a maximum forward transmission of 88% at 550 nm wavelength and a very high contrast ratio (∼23 dB) at a wavelength of 461 nm were obtained. It is numerically shown that the asymmetric transmission has been directly related to the appearance of high-order diffractions for only one direction excitation case. This study provides a path toward the realization of optical diodes for applications, such as optical communications and laser systems. en_US
dc.language.iso eng en_US
dc.publisher OSA - The Optical Society
dc.rights info:eu-repo/semantics/closedAccess
dc.subject Photonic crystals en_US
dc.subject Waveguides en_US
dc.subject Optical diode en_US
dc.title Broadband and polarization-independent asymmetric transmission of visible light through a three-dimensional trapezoidal metallic metasurface en_US
dc.type article
dc.relation.journal Journal of the Optical Society of America B: Optical Physics
dc.contributor.department TOBB ETU, Faculty of Engineering, Department of Material Science & Nanotechnology Engineering en_US
dc.identifier.volume 35 t
dc.identifier.issue 9
dc.identifier.startpage 2111
dc.identifier.endpage 2117
dc.identifier.wos WOS:000443263500006
dc.identifier.scopus 2-s2.0-85052730440
dc.contributor.tobbetuauthor Kurt, Hamza
dc.contributor.YOKid 200103
dc.relation.publicationcategory Uluslararası yayın


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record