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A Silicon-Based Infra-Red Photodetector Exploiting Erbium-Doped Silicon Nanocrystals

Published online by Cambridge University Press:  10 February 2011

Anthony J. Kenyon ,
Sukhvinder S. Bhamber  and
Christopher W. Pitt
Anthony J. Kenyon
Affiliation:
Department of Electronic & Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
Sukhvinder S. Bhamber
Affiliation:
Department of Electronic & Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
Christopher W. Pitt
Affiliation:
Department of Electronic & Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
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Abstract

We have exploited the interaction between erbium ions and silicon nanoclusters to produce a photodetector for use in the spectral region around 1.5 μm. The device consists of an MOS structure in which the oxide layer has been implanted with both erbium and silicon and annealed to produce silicon nanocrystals around 3 nm in diameter. Upon illumination with a 1480 nm laser diode, the well-known interaction between the nanocrystals and the rare-earth ions results in a transfer of excitation from the erbium ion to nearby silicon nanocrystals. The resultant modification of the conductivity of the oxide layer enables a current to flow when a voltage is applied.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 770: Symposium I – Optoelectronics of Group-IV-Based Materials , 2003 , I6.11
Copyright
Copyright © Materials Research Society 2003

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