A ten-period InAs-GaAs quantum-dot infrared photodetector (QDIP) with 8-nm In0.15Ga0.85 As capping layer grown after quantum-dot (QD) deposition is investigated. With reduced InAs QD coverage down to 2.0 mono-layers, responses at 10.4 and 8.4 mu m are observed for the device under positive and negative biases, respectively. The phenomenon is attributed to the large Stark effect resulted from the asymmetric band diagrams of the device under different voltage polarities. The demonstration of long-wavelength infrared detections with the simple structures of the InGaAs-capped QDIP is advantageous for the development of multicolor QDIP focal-plane arrays.
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Pontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, Brazil
Landi, SM
Pires, MP
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Pontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, Brazil
Pires, MP
Tribuzy, CVB
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Pontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, Brazil
Tribuzy, CVB
Souza, PL
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Pontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, Brazil
Souza, PL
Marega, E
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Pontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, Brazil
Marega, E
Silva, AG
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Pontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, Brazil
Silva, AG
Guimaraes, PSS
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Pontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, LabSem, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, Brazil
Guimaraes, PSS
Physica Status Solidi C - Conferences and Critical Reviews, Vol 2, No 8,
2005,
2
(08):
: 3171
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3174