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dc.contributor.authorAlias, Mohd Sharizal
dc.contributor.authorJanjua, Bilal
dc.contributor.authorZhao, Chao
dc.contributor.authorPriante, Davide
dc.contributor.authorAlhamoud, Abdullah
dc.contributor.authorTangi, Malleswararao
dc.contributor.authorAlanazi, Lafi M.
dc.contributor.authorAlatawi, Abdullah
dc.contributor.authorAlbadri, Abdulrahman M.
dc.contributor.authorAlyamani, Ahmed Y.
dc.contributor.authorNg, Tien Khee
dc.contributor.authorOoi, Boon S.
dc.date.accessioned2017-09-20T06:02:14Z
dc.date.available2017-09-20T06:02:14Z
dc.date.issued2017-09-11
dc.identifier.citationAlias MS, Janjua B, Zhao C, Priante D, Alhamoud AA, et al. (2017) Enhancing the Light-Extraction Efficiency of AlGaN Nanowires Ultraviolet Light-Emitting Diode by using Nitride/Air Distributed Bragg Reflector Nanogratings. IEEE Photonics Journal: 1–1. Available: http://dx.doi.org/10.1109/jphot.2017.2749198.
dc.identifier.issn1943-0655
dc.identifier.doi10.1109/jphot.2017.2749198
dc.identifier.urihttp://hdl.handle.net/10754/625477
dc.description.abstractThe performance and efficiency of AlGaN ultraviolet light-emitting diodes have been limited by the extremely low light-extraction efficiency (LEE) due to the intrinsic material properties of AlGaN. Here, to enhance the LEE of the device, we demonstrate an AlGaN nanowires light-emitting diode (NWs-LED) integrated with nitride/air Distributed Bragg Reflector (DBR) nanogratings. Compared to a control device (only mesa), the AlGaN NWs-LED with the nitride/air DBR nanogratings exhibit enhancement in the light output power and external quantum efficiency (EQE) by a factor of ∼1.67. The higher light output power and EQE are attributed mainly to the multiple reflectances laterally for the transverse magnetic (TM)-polarized light and scattering introduced by the nanogratings. To further understand the LEE enhancement, the electrical field distribution, extraction ratio and polar pattern of the AlGaN NWs-LED with and without the nitride/air DBR nanogratings were analyzed using the finite-difference-time-domain method. It was observed that the TM-field emission was confined and scattered upward whereas the polar pattern was intensified for the AlGaN NWs-LED with the nanogratings. Our approach to enhance the LEE via the nitride/air DBR nanogratings can provide a promising route for increasing the efficiency of AlGaN-based LEDs, also, to functioning as facet mirror for AlGaN-based laser diodes.
dc.description.sponsorshipThis publication is based upon work supported by the King Abdulaziz City for Science and Technology (KACST), Grant No. KACST TIC R2-FP-008, and the King Abdullah University of Science and Technology (KAUST) baseline funding BAS/1/1614-01-01.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://ieeexplore.ieee.org/document/8031397/
dc.rights(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
dc.subjectAlGaN
dc.subjectnanowires
dc.subjectLED
dc.subjectDBR gratings
dc.titleEnhancing the Light-Extraction Efficiency of AlGaN Nanowires Ultraviolet Light-Emitting Diode by using Nitride/Air Distributed Bragg Reflector Nanogratings
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentPhotonics Laboratory
dc.identifier.journalIEEE Photonics Journal
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionNational Center for Nanotechnology, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442-6086, Saudi Arabia
kaust.personAlias, Mohd Sharizal
kaust.personJanjua, Bilal
kaust.personZhao, Chao
kaust.personPriante, Davide
kaust.personAlhamoud, Abdullah
kaust.personTangi, Malleswararao
kaust.personAlatawi, Abdullah
kaust.personNg, Tien Khee
kaust.personOoi, Boon S.
refterms.dateFOA2018-06-14T05:06:49Z


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