Broadband optical modulators based on graphene supercapacitors

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dc.citation.epage5857en_US
dc.citation.issueNumber12en_US
dc.citation.spage5851en_US
dc.citation.volumeNumber13en_US
dc.contributor.authorPolat, E. O.en_US
dc.contributor.authorKocabas, C.en_US
dc.date.accessioned2016-02-08T11:03:39Z
dc.date.available2016-02-08T11:03:39Z
dc.date.issued2013en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractOptical modulators are commonly used in communication and information technology to control intensity, phase, or polarization of light. Electro-optic, electroabsorption, and acousto-optic modulators based on semiconductors and compound semiconductors have been used to control the intensity of light. Because of gate tunable optical properties, graphene introduces new potentials for optical modulators. The operation wavelength of graphene-based modulators, however, is limited to infrared wavelengths due to inefficient gating schemes. Here, we report a broadband optical modulator based on graphene supercapacitors formed by graphene electrodes and electrolyte medium. The transparent supercapacitor structure allows us to modulate optical transmission over a broad range of wavelengths from 450 nm to 2 μm under ambient conditions. We also provide various device geometries including multilayer graphene electrodes and reflection type device geometries that provide modulation of 35%. The graphene supercapacitor structure together with the high-modulation efficiency can enable various active devices ranging from plasmonics to optoelectronics. © 2013 American Chemical Society.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T11:03:39Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2013en
dc.identifier.doi10.1021/nl402616ten_US
dc.identifier.eissn1530-6992
dc.identifier.issn1530-6984
dc.identifier.urihttp://hdl.handle.net/11693/26702
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/nl402616ten_US
dc.source.titleNano Lettersen_US
dc.subjectGrapheneen_US
dc.subjectOptical modulatoren_US
dc.subjectSupercapacitoren_US
dc.subjectOptoelectronicsen_US
dc.titleBroadband optical modulators based on graphene supercapacitorsen_US
dc.typeArticleen_US

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