Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1334
Título: A non-pixel image reader for continuous image detection based on tandem heterostructures
Autor: Vieira, Maria Manuela Almeida Carvalho
Fernandes, Miguel
Fantoni, Alessandro
Louro, Paula
Palavras-chave: Tandem structures
Heterojunction
Image sensor
Electrical and numerical simulation
Data: 21-Set-2004
Editora: Elsevier Science SA
Citação: Vieira M, Fernandes M, Fantoni A, Louro P. A non-pixel image reader for continuous image detection based on tandem heterostructures. Sensors and Actuators A-Physical. 2004; Volume 115, Issue 2-3, 191-195.
Relatório da Série N.º: 115
Resumo: An optically addressed read-write sensor based on two stacked p-i-n heterojunctions is analyzed. The device is a two terminal image sensing structure. The charge packets are injected optically into the p-i-n writer and confined at the illuminated regions changing locally the electrical field profile across the p-i-n reader. An optical scanner is used for charge readout. The design allows a continuous readout without the need for pixel-level patterning. The role of light pattern and scanner wavelengths on the readout parameters is analyzed. The optical-to-electrical transfer characteristics show high quantum efficiency, broad spectral response, and reciprocity between light and image signal. A numerical simulation supports the imaging process. A black and white image is acquired with a resolution around 20 mum showing the potentiality of these devices for imaging applications.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1334
ISSN: 0924-4247
Aparece nas colecções:ISEL - Eng. Elect. Tel. Comp. - Artigos



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