Optical confinement and colour separation in a double colour laser scanned photodiode (D/CLSP)

Vieira, Manuela; Fernandes, Miguel; Louro, Paula; Fantoni, Alessandro; Rodrigues, Isabel Maria Cabrita

http://hdl.handle.net/10400.21/1350

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Authors

Rodrigues, Isabel Maria Cabrita

Abstract(s)

Large area n-i-p-n-i-p a-SiC:H heterostructures are used as sensing element in a double colour laser scanned photodiode image sensor (D/CLSP). This work aims to clarify possible improvements, physical limits and performance of CLSP image sensor when used as non-pixel image reader. Here, the image capture device and the scanning reader are optimized and the effects of the sensor structure on the output characteristics discussed. The role of the design of the sensing element, the doped layer composition and thickness, the read-out parameters (applied voltage and scanner frequency) on the image acquisition and the colour detection process are analysed. A physical model is presented and supported by a numerical simulation of the output characteristics of the sensor.

Keywords

Tandem structures Heterojunction Image sensor Electrical and numercial simulation

URI

http://hdl.handle.net/10400.21/1350

Citation

VIEIRA, M.; [et al] – Optical confinement and colour separation in a double colour laser scanned photodiode (D/CLSP). Sensors and Actuators A: Physical. ISSN 0924-4247. Vol. 114, N.º 2-3 (2004), pp. 219-223.