Laser scanned photodiodes (LSPs) for image sensing

M Vieira, M Fernandes, Y Vygranenko, P Louro… - Sensors and Actuators A …, 2002 - Elsevier
An optimized ZnO: Al/a-pin SixC1–x: H/Al configuration for the laser scanned photodiode
(LSP) imaging detector is proposed and the read-out parameters improved. The effect of the …

Bias sensitive multispectral structures for imaging applications

M Vieira, A Fantoni, M Fernandes, P Louro, G Lavareda… - Thin Solid Films, 2007 - Elsevier
In this paper we present results on the optimization of an pinpii 'n'type a-Si: H based three
color detector with voltage controlled spectral sensitivity. The sensor element was fabricated …

Photocurrent and Spectral Response Analysis of a-SiC: H Pinip and Pinpin Photodiodes

A Fantoni, M Vieira, Y Vygranenko… - … of Nanoscience and …, 2009 - ingentaconnect.com
We present in this paper results about the analysis of photocurrent and spectral response in
a-SiC: H/a-Si: H pinpin and pinip structures. Our experiments and analysis reveal the …

Semiconductor device as optical demultiplexer for short range optical communications

P Louro, M Vieira, M Fernandes… - … of Nanoscience and …, 2011 - ingentaconnect.com
In this paper we present results on the use of a multilayered a-SiC: H heterostructure as a
wavelength-division demultiplexing device for the visible light spectrum. The proposed …

Stacked nipnip heterojunctions for image recognition

M Vieira, A Fantoni, M Fernandes, P Louro… - MRS Online …, 2003 - cambridge.org
This work aims to clarify possible improvements and physical limits of the Color Laser
Scanned Photodiode image sensor when used as high sensitive non-pixel image reader. A …

New p–i–n Si: H imager configuration for spatial resolution improvement

M Vieira, M Fernandes, J Martins, PL Antunes… - Sensors and Actuators A …, 2001 - Elsevier
Amorphous glass/ZnO: Al/p (a-Si: H)/i (a-Si: H)/n (a-Si1− xCx: H)/Al imagers with different n-
layer resistivities were produced by plasma enhanced chemical vapour deposition …

Optical demultiplexer based on an a‐SiC: H voltage controlled device

P Louro, M Vieira, M Fernandes, J Costa… - … status solidi c, 2010 - Wiley Online Library
In this paper we present results on the use of a semiconductor heterostructure based on a‐
SiC: H as a wavelength‐division demultiplexer for the visible light spectrum. The proposed …

Photodetector with integrated optical thin film filters

MA Vieira, M Vieira, P Louro, V Silva… - Journal of Physics …, 2013 - iopscience.iop.org
This paper reports on optical filters based on a-SiC: H tandem pín/pin heterostructures. The
spectral sensitivity is analyzed. Steady state optical bias with different wavelengths are …

Readout improvement in large area a-SiC: H-based image sensors

M Fernandes, Y Vygranenko, M Vieira - Applied surface science, 2001 - Elsevier
We suggest to enhance the performance of image acquisition systems based on large area
amorphous silicon-based sensors by optimizing the readout parameters such as the …

Tailored Laser scanned photodiodes (LSP) for image recognition

M Vieira, M Fernandes, P Louro… - MRS Online …, 2001 - cambridge.org
A tailored ZnO: Al/apin SiC: H/Al configuration for the laser scanned photodiode (LSP)
imaging detector is proposed. The LSP utilizes light modulated depletion layers as detector …