Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback

Detalhes bibliográficos
Autor(a) principal: Neto, Gilson
Data de Publicação: 2008
Outros Autores: Lima, Antonio Marcus Nogueira, Khrebtov, Igor A., Malyarov, Valery G., Moreira, Cleumar S., Almeida, Luiz Alberto Luz de, Neff, Helmut Franz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13916
Resumo: Texto completo: acesso restrito. p. 1-15
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spelling Neto, GilsonLima, Antonio Marcus NogueiraKhrebtov, Igor A.Malyarov, Valery G.Moreira, Cleumar S.Almeida, Luiz Alberto Luz deNeff, Helmut FranzNeto, GilsonLima, Antonio Marcus NogueiraKhrebtov, Igor A.Malyarov, Valery G.Moreira, Cleumar S.Almeida, Luiz Alberto Luz deNeff, Helmut Franz2013-11-26T13:10:25Z20080091-3286http://repositorio.ufba.br/ri/handle/ri/13916v. 47, n. 7Texto completo: acesso restrito. p. 1-15The influence of electrothermal feedback and hysteresis on the operation conditions, noise, and performance of a VO2 transition-edge microbolometer has been evaluated. The material undergoes a first-order semiconductor-to-metal phase transition (SMT) within the temperature range 40<T<70°C. Due to electrothermal feedback, all device parameters, including the required heat-sink temperature, output voltage and current response, response time, linear dynamic range, responsivity, noise, and detectivity, display complex and nonlinear variations with temperature, electrical biasing conditions, input radiation levels, and hysteresis width. In the constant-current mode, the device responsivity extends over a broad temperature range, but under constant-voltage operation it is sharply localized and restricted to the SMT center. Film quality, as represented by the transition and the hysteresis width and the flicker noise magnitude, crucially affects device performance. In the weak hysteretic case and at low 1/f noise levels, the device detectivity improves substantially in both operation modes. The spectral range of the device is largely determined by the optical absorptivity of the VO2 film. For operation within the SMT, it extends well into the far IR wavelength region of the atmospheric window, but is substantially smaller for operation in the semiconducting region.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-11-19T15:37:19Z No. of bitstreams: 1 10.1117-1.2956386.pdf: 776820 bytes, checksum: 0c9f0b302b356a067f47b12e7af0605f (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2013-11-26T13:10:24Z (GMT) No. of bitstreams: 1 10.1117-1.2956386.pdf: 776820 bytes, checksum: 0c9f0b302b356a067f47b12e7af0605f (MD5)Made available in DSpace on 2013-11-26T13:10:25Z (GMT). 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dc.title.pt_BR.fl_str_mv Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
dc.title.alternative.pt_BR.fl_str_mv Optical Engineering
title Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
spellingShingle Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
Neto, Gilson
title_short Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
title_full Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
title_fullStr Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
title_full_unstemmed Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
title_sort Figures of merit and optimization of a VO 2 microbolometer with strong electrothermal feedback
author Neto, Gilson
author_facet Neto, Gilson
Lima, Antonio Marcus Nogueira
Khrebtov, Igor A.
Malyarov, Valery G.
Moreira, Cleumar S.
Almeida, Luiz Alberto Luz de
Neff, Helmut Franz
author_role author
author2 Lima, Antonio Marcus Nogueira
Khrebtov, Igor A.
Malyarov, Valery G.
Moreira, Cleumar S.
Almeida, Luiz Alberto Luz de
Neff, Helmut Franz
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Neto, Gilson
Lima, Antonio Marcus Nogueira
Khrebtov, Igor A.
Malyarov, Valery G.
Moreira, Cleumar S.
Almeida, Luiz Alberto Luz de
Neff, Helmut Franz
Neto, Gilson
Lima, Antonio Marcus Nogueira
Khrebtov, Igor A.
Malyarov, Valery G.
Moreira, Cleumar S.
Almeida, Luiz Alberto Luz de
Neff, Helmut Franz
description Texto completo: acesso restrito. p. 1-15
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2013-11-26T13:10:25Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/13916
dc.identifier.issn.none.fl_str_mv 0091-3286
dc.identifier.number.pt_BR.fl_str_mv v. 47, n. 7
identifier_str_mv 0091-3286
v. 47, n. 7
url http://repositorio.ufba.br/ri/handle/ri/13916
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1117/1.2956386
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