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Optical Processing Devices for Optical Communications: Multilayered a-SiC:H Architectures

Published online by Cambridge University Press:  31 January 2011

Paula Louro ,
Manuela Vieira ,
M. A. Vieira ,
Miguel Fernandes ,
Alessandro Fantoni ,
G. Lavareda  and
C. N. Carvalho
Paula Louro
Affiliation:
plouro@deetc.isel.ipl.pt, ISEL, DEETC, Lisbon, Portugal
Manuela Vieira
Affiliation:
mv@isel.ipl.pt, ISEL, DEETC, R. Conselheiro Emídio Navarro, Lisbon, 1954-114, Portugal
M. A. Vieira
Affiliation:
mvieira@deetc.isel.ipl.pt, ISEL, DEETC, Lisbon, Portugal
Miguel Fernandes
Affiliation:
mfernandes@deetc.isel.ipl.pt, ISEL, DEETC, Lisbon, Portugal
Alessandro Fantoni
Affiliation:
afantoni@deetc.isel.ipl.pt, ISEL, DEETC, Lisbon, Portugal
G. Lavareda
Affiliation:
pcanc@ist.utl.pt, Uninova, CTS, Lisbon, Portugal
C. N. Carvalho
Affiliation:
canc@ist.utl.pt, IST, ICEMS, Lisbon, United States
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Abstract

In this paper three multilayered architectures based on a-SiC:H with voltage controlled spectral selectivity in the visible spectrum range are analyzed. Multiple simultaneous modulated communication channels (red, green and blue or their polychromatic mixtures) were transmitted together at different frequencies. The combined optical signal was analyzed by reading out the photocurrent signal generated by the devices, under different applied voltages. Results show that the multiplexed signal depends on the device architecture and is balanced by the wavelength and transmission speed of each input channel, keeping the memory of the incoming optical carriers. In the single graded p-i’i-n configuration the device acts mainly as an optical switch while in two stacked p-i’-n-(ITO)-p-i-n configurations, the input channels are selectively tuned by shifting between forward and reverse bias. An electrical model, supported by a numerical simulation gives insight into the device operation.

Keywords

optoelectronicsensorsimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1153: Symposium A – Amorphous and Polycrystalline Thin Film Silicon Science and Technology–2009 , 2009 , 1153-A19-01
Copyright
Copyright © Materials Research Society 2009

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References

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