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Doctoral Thesis
DOI
10.11606/T.43.2017.tde-02082017-153952
Document
Author
Full name
Marcel Santos Claro
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2017
Supervisor
Committee
Quivy, Alain Andre (President)
Chitta, Valmir Antonio
Degani, Marcos Henrique
Levine, Alexandre
Penello, Germano Maioli
Title in Portuguese
Novas tecnologias para detecção infravermelha de alto desempenho
Keywords in Portuguese
circuito de leitura
detector de cascateamento quântico
detectores infravermelhos
epitaxia
ponto quântico
submonocamada
Abstract in Portuguese
Neste trabalho, foi estudado a aplicação de novas heteroestruturas semicondutoras para detecção de radiação na região do infravermelho médio. Pontos quânticos de submonocamada, detectores de cascateamento quântico e pontos quânticos de InAlAs foram testados como opção para corrigir as deficiências em responsividade, corrente de escuro e temperatura de operação, comuns nas heteroestruturas convencionais baseadas em poços quânticos e pontos quânticos de InAs obtidos no regime de crescimento Stranski-Krastanov. Também foi projetado, fabricado e testado um circuito eletrônico de leitura de sinal misto para integração com matrizes de sensores e produção de imagens. Esse tipo de circuito possui uma série de vantagens em relação aos dispositivos convencionais que costumam ser completamente analógicos.
Title in English
Novel Technologies for High Performance Infrared Detection
Keywords in English
epitaxy
infrared photodetector
quantum dot
quantum-cascade detector
read-out circuit.
submonolayer
Abstract in English
In this work, we studied the application of new types of semiconductor heterostructures for mid-infrared detection. Submonolayer quantum dots (SML-QDs), quantum-cascade detectors (QCDs) and InAlAs quantum dots were tested as an option to circumvent the common shortcomings of responsivity, dark current and operating temperature of the usual heterestructures based on quantum wells (QWs) and InAs Stranski-Krastanov quantum dots. We also designed, fabricated and tested a mixed-signal read-out circuit aiming the fabrication of focalplane arrays (FPAs) for applications to infrared imaging. This kind of architecture has several advantages over a fully analog design.
 
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tesecapapadrao.pdf (22.36 Mbytes)
Publishing Date
2017-08-04
 
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