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dc.contributor.authorGhobadi, Amiren_US
dc.contributor.authorHajian, Hodjaten_US
dc.contributor.authorGökbayrak, Muraten_US
dc.contributor.authorBütün, Bayramen_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2020-02-11T11:33:47Z
dc.date.available2020-02-11T11:33:47Z
dc.date.issued2019
dc.identifier.issn2192-8614
dc.identifier.urihttp://hdl.handle.net/11693/53274
dc.description.abstractIn recent years, sub-wavelength metamaterials-based light perfect absorbers have been the subject of many studies. The most frequently utilized absorber configuration is based on nanostructured plasmonic metals. However, two main drawbacks were raised for this design architecture. One is the fabrication complexity and large scale incompatibility of these nano units. The other one is the inherent limitation of these common metals which mostly operate in the visible frequency range. Recently, strong interference effects in lithography-free planar multilayer designs have been proposed as a solution for tackling these drawbacks. In this paper, we reveal the extraordinary potential of bismuth (Bi) metal in achieving light perfect absorption in a planar design through a broad wavelength regime. For this aim, we adopted a modeling approach based on the transfer matrix method (TMM) to find the ideal conditions for light perfect absorption. According to the findings of our modeling and numerical simulations, it was demonstrated that the use of Bi in the metal-insulator-metal-insulator (MIMI) configuration can simultaneously provide two distinct functionalities; a narrow near unity reflection response and an ultra-broadband near perfect absorption. The reflection behavior can be employed to realize additive color filters in the visible range, while the ultra-broadband absorption response of the design can fully harvest solar irradiation in the visible and near infrared (NIR) ranges. The findings of this paper demonstrate the extraordinary potential of Bi metal for the design of deep sub-wavelength optical devices.en_US
dc.language.isoEnglishen_US
dc.source.titleNanophotonicsen_US
dc.relation.isversionofhttps://dx.doi.org/10.1515/nanoph-2018-0217en_US
dc.subjectPerfect absorberen_US
dc.subjectMetamaterialsen_US
dc.subjectColor filteren_US
dc.subjectSolar irradiationen_US
dc.subjectPlasmonic resonanceen_US
dc.subjectImpedance matchingen_US
dc.titleBismuth-based metamaterials: from narrowband reflective color filter to extremely broadband near perfect absorberen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.citation.spage823en_US
dc.citation.epage832en_US
dc.citation.volumeNumber8en_US
dc.citation.issueNumber5en_US
dc.identifier.doi10.1515/nanoph-2018-0217en_US
dc.publisherDe Gruyteren_US
dc.contributor.bilkentauthorGhobadi, Amir
dc.contributor.bilkentauthorHajian, Hodjat
dc.contributor.bilkentauthorGökbayrak, Murat
dc.contributor.bilkentauthorBütün, Bayram
dc.contributor.bilkentauthorÖzbay, Ekmel


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