Tuning optical a-SiC/a-Si active filters by UV bias light in the visible and infrared spectral ranges

M. Vieira, M. A. Vieira, I. Rodrigues, V. Silva, P. Louro

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Visible range to telecom band spectral translation is accomplished using an amorphous SiC pi'n/pin wavelength selector under appropriate front and back optical light bias. Results show that background intensity works as selectors in the infrared region, shifting the sensor sensitivity. Low intensities select the near-infrared range while high intensities select the visible part according to its wavelength. Here, the optical gain is very high in the infrared/red range, decreases in the green range, stays close to one in the blue region and strongly decreases in the near-UV range. The transfer characteristics effects due to changes in steady state light intensity and wavelength backgrounds are presented. The relationship between the optical inputs and the output signal is established. A capacitive optoelectronic model is presented and tested using the experimental results.

Original languageEnglish
Pages (from-to)1674-1677
Number of pages4
JournalPhysica Status Solidi (C) Current Topics In Solid State Physics
Volume11
Issue number11-12
DOIs
Publication statusPublished - 2014

Keywords

  • Amorphous SiC tandem devices
  • Integrated optical filter
  • Spectral sensitivity
  • Visible/IR communications

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