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Optical design of nanowire absorbers for wavelength selective photodetectors

Mokkapati, Sudha; Saxena, Dhruv; Jagadish, Chennupati; Tan, Hark Hoe

Description

We propose the optical design for the absorptive element of photodetectors to achieve wavelength selective photo response based on resonant guided modes supported in semiconductor nanowires. We show that the waveguiding properties of nanowires result in very high absorption efficiency that can be exploited to reduce the volume of active semiconductor compared to planar photodetectors, without compromising the photocurrent. We present a design based on a group of nanowires with varying diameter...[Show more]

dc.contributor.authorMokkapati, Sudha
dc.contributor.authorSaxena, Dhruv
dc.contributor.authorJagadish, Chennupati
dc.contributor.authorTan, Hark Hoe
dc.date.accessioned2016-06-14T23:20:19Z
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/1885/103313
dc.description.abstractWe propose the optical design for the absorptive element of photodetectors to achieve wavelength selective photo response based on resonant guided modes supported in semiconductor nanowires. We show that the waveguiding properties of nanowires result in very high absorption efficiency that can be exploited to reduce the volume of active semiconductor compared to planar photodetectors, without compromising the photocurrent. We present a design based on a group of nanowires with varying diameter for multi-color photodetectors with small footprint. We discuss the effect of a dielectric shell around the nanowires on the absorption efficiency and present a simple approach to optimize the nanowire diameter-dielectric shell thickness for maximizing the absorption efficiency.
dc.publisherNature Publishing Group
dc.rightsAuthor/s retain copyright
dc.sourceScientific Reports
dc.titleOptical design of nanowire absorbers for wavelength selective photodetectors
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume5
dc.date.issued2015
local.identifier.absfor020400 - CONDENSED MATTER PHYSICS
local.identifier.absfor100700 - NANOTECHNOLOGY
local.identifier.absfor100711 - Nanophotonics
local.identifier.ariespublicationU3488905xPUB6448
local.type.statusPublished Version
local.contributor.affiliationMokkapati, Sudha, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationSaxena, Dhruv, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTan, Hoe Hark, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationJagadish, Chennupati, College of Physical and Mathematical Sciences, ANU
local.identifier.doi10.1038/srep15339
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-06-14T08:47:55Z
local.identifier.scopusID2-s2.0-84944340042
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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