Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/168497
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dc.titleChalcogenide Phase Change Material for Active Terahertz Photonics
dc.contributor.authorPitchappa, Prakash
dc.contributor.authorKumar, Abhishek
dc.contributor.authorPrakash, Saurav
dc.contributor.authorJani, Hariom
dc.contributor.authorVenkatesan, Thirumalai
dc.contributor.authorSingh, Ranjan
dc.date.accessioned2020-05-27T07:20:21Z
dc.date.available2020-05-27T07:20:21Z
dc.date.issued2019-01-27
dc.identifier.citationPitchappa, Prakash, Kumar, Abhishek, Prakash, Saurav, Jani, Hariom, Venkatesan, Thirumalai, Singh, Ranjan (2019-01-27). Chalcogenide Phase Change Material for Active Terahertz Photonics. ADVANCED MATERIALS 31 (12). ScholarBank@NUS Repository.
dc.identifier.issn09359648
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/168497
dc.description.abstractThe strikingly contrasting optical properties of various phases of chalcogenide phase change materials (PCM) has recently led to the development of novel photonic devices such as all-optical non-von Neumann memory, nanopixel displays, color rendering, and reconfigurable nanoplasmonics. However, the exploration of chalcogenide photonics is currently limited to optical and infrared frequencies. Here, a phase change material integrated terahertz metamaterial for multilevel nonvolatile resonance switching with spatial and temporal selectivity is demonstrated. By controlling the crystalline proportion of the PCM film, multilevel, non-volatile, terahertz resonance switching states with long retention time at zero hold power are realized. Spatially selective reconfiguration at sub-metamaterial scale is shown by delivering electrical stimulus locally through designer interconnect architecture. The PCM metamaterial also features ultrafast optical modulation of terahertz resonances with tunable switching speed based on the crystalline order of the PCM film. The multilevel nonvolatile, spatially selective, and temporally tunable PCM metamaterial will provide a pathway toward development of novel and disruptive terahertz technologies including spatio-temporal terahertz modulators for high speed wireless communication, neuromorphic photonics, and machine-learning metamaterials. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
dc.publisherWiley-VCH Verlag
dc.relation.isreplacedbyhdl:null
dc.subjectGermanium antimony telluride
dc.subjectMetamaterials
dc.subjectNon-volatile photonics
dc.subjectPhotonics
dc.subjectTerahertz
dc.subjectUltrafast modulators
dc.typeArticle
dc.contributor.departmentDEPT OF ELECTRICAL & COMPUTER ENGG
dc.contributor.departmentNUS NANOSCIENCE & NANOTECH INITIATIVE
dc.description.sourcetitleADVANCED MATERIALS
dc.description.volume31
dc.description.issue12
dc.published.statePublished
dc.grant.idNRF-CRP15-2015-01
dc.grant.fundingagencyNational Research Foundation
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