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Light-triggered Silicon-carbon Pi'npin Devices for Optical Communications: Theoretical and Electrical Approaches

Published online by Cambridge University Press:  01 February 2011

Manuela Vieira ,
M. A. Vieira ,
João Costa ,
Paula Louro ,
Miguel Fernandes  and
Alessandro Fantoni
Manuela Vieira
Affiliation:
[email protected], ISEL, DEETC, R. Conselheiro Emídio Navarro, Lisbon, 1954-114, Portugal
M. A. Vieira
Affiliation:
[email protected], ISEL, DEETC, Lisbon, Portugal
João Costa
Affiliation:
[email protected], ISEL, DEETC, Lisbon, Portugal
Paula Louro
Affiliation:
[email protected], ISEL, DEETC, Lisbon, Portugal
Miguel Fernandes
Affiliation:
[email protected], ISEL, DEETC, Lisbon, Portugal
Alessandro Fantoni
Affiliation:
[email protected], ISEL, DEETC, Lisbon, Portugal
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Abstract

In this paper a light-activated multiplexer/demultiplexer silicon-carbon device is analysed. An electrical model for the device operation is presented and used to compare output signals with experimental data. An algorithm that takes into accounts the voltage and the optical bias controlled sensitivities is developed. The device is a double pi'n/pin a-SiC:H heterostructure with two optical gate connections for light triggering in different spectral regions. Multiple monochromatic pulsed communication channels were transmitted together, each one with a specific bit sequence. The combined optical signal was analyzed by reading out, under different applied voltages and optical bias, the generated photocurrent across the device. Experimental and simulated results show that the output multiplexed signal has a strong nonlinear dependence on the light absorption profile, i.e. on the incident light wavelength, bit rate and intensity under unbalanced light generation of carriers. By switching between positive and negative voltages the input channels can be recovered or removed from the output signal.

Keywords

actuatoroptoelectronicsimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1245: Symposium A – Amorphous and Polycrystalline Thin-Film Silicon Science and Technology-2010 , 2010 , 1245-A18-06
Copyright
Copyright © Materials Research Society 2010

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References

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