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Schottky MSM junctions for carrier depletion in silicon photonic crystal microcavities.
Opt Express ; 21(8): 10324-34, 2013 Apr 22.
Artigo em Inglês | MEDLINE | ID: mdl-23609742
ABSTRACT
Collection of free carriers is a key issue in silicon photonics devices. We show that a lateral metal-semiconductor-metal Schottky junction is an efficient and simple way of dealing with that issue in a photonic crystal microcavity. Using a simple electrode design, and taking into account the optical mode profile, the resulting carrier distribution in the structure is calculated. We show that the corresponding effective free carrier lifetime can be reduced by 50 times when the bias is tuned. This allows one to maintain a high cavity quality factor under strong optical injection. In the fabricated structures, carrier depletion is correlated with transmission spectra and directly visualized by Electron Beam Induced Current pictures. These measurements demonstrate the validity of this carrier extraction principle. The design can still be optimized in order to obtain full carrier depletion at a smaller energy cost.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Semicondutores / Silício / Ressonância de Plasmônio de Superfície Idioma: Inglês Revista: Opt Express Assunto da revista: Oftalmologia Ano de publicação: 2013 Tipo de documento: Artigo