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Optical nonlinearity in Tandem SI-C photodetectors

2012-10Journal article Restricted access
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dc.contributor.authorLouro, Paula
dc.contributor.authorVieira, Manuela
dc.contributor.authorVieira, Manuel Augusto
dc.date.accessioned2015-09-07T14:30:40Z
dc.date.available2015-09-07T14:30:40Z
dc.date.issued2012-10
dc.description.abstractThe behavior of tandem pin heterojunctions based on a-SiC: H alloys is investigated under different optical and electrical bias conditions. The devices are optimized to act as optically selective wavelength filters. Depending on the device configuration (optical gaps, thickness, sequence of cells in the stack structure) and on the applied voltage (positive or negative) and optical bias (wavelength, intensity, frequency) it is possible to combine the wavelength discrimination function with the self amplification of the signal. This wavelength nonlinearity allows the amplification or the rejection of a weak signal-impulse. The device works as an active tunable optical filter for wavelength selection and can be used as an add/drop multiplexer (ADM) which enables data to enter and leave an optical network bit stream without having to demultiplex the stream. Results show that, even under weak transient input signals, the background wavelength controls the output signal. This nonlinearity, due to the transient asymmetrical light penetration of the input channels across the device together with the modification on the electrical field profile due to the optical bias, allows tuning an input channel without demultiplexing the stream. This high optical nonlinearity makes the optimized devices attractive for the amplification of all optical signals. Transfer characteristics effects due to changes in steady state light, control d.c. voltage and applied light pulses are presented. Based on the experimental results and device configuration an optoelectronic model is developed. The transfer characteristics effects due to changes in steady state light, dc control voltage or applied light pulses are simulated and compared with the experimental data. A good agreement was achieved.por
dc.identifier.citationLOURO, Paula; VIEIRA, Manuela; VIEIRA, Manuel A. – Optical nonlinearity in Tandem SI-C photodetectors. Physica Status Solidi C. ISSN: 1862-6351. Vol. 9, N.º 10-11 (2012), pp. 2054-2057.por
dc.identifier.doi10.1002/pssc.201200210
dc.identifier.issn1862-6351
dc.identifier.urihttp://hdl.handle.net/10400.21/5090
dc.language.isoengpor
dc.publisherWiley-VCH Verlag Gmbhpor
dc.relationPTDC/EEAELC/120539/2010
dc.subjectSi-Cpor
dc.subjectHeterostructurespor
dc.subjectOptical Nonlinearitypor
dc.subjectPhotodetectorspor
dc.titleOptical nonlinearity in Tandem SI-C photodetectorspor
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FEEA-ELC%2F111854%2F2009/PT
oaire.citation.endPage2057por
oaire.citation.issue10-11por
oaire.citation.startPage2054por
oaire.citation.titlePhysica Status Solidi C-Current Topics in Solid State Physicspor
oaire.citation.volume9por
oaire.fundingStream3599-PPCDT
person.familyNameLouro
person.familyNameVieira
person.familyNameAugusto Vieira
person.givenNamePaula
person.givenNameManuela
person.givenNameManuel
person.identifier499161
person.identifier10792
person.identifierI-8527-2018
person.identifier.ciencia-idE511-8C08-E606
person.identifier.ciencia-id9516-E25E-BB8E
person.identifier.ciencia-idA511-1330-549F
person.identifier.orcid0000-0002-4167-2052
person.identifier.orcid0000-0002-1150-9895
person.identifier.orcid0000-0003-1385-3646
person.identifier.ridU-8346-2017
person.identifier.ridV-7860-2017
person.identifier.scopus-author-id8845716400
person.identifier.scopus-author-id7202140173
person.identifier.scopus-author-id5719 1567905
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication730dc3dd-73eb-428d-b3a6-430085e33585
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