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Proceedings Paper

Light confinement and absorption in metal-semiconductor-metal nanostructures
Author(s): Stephane Collin; Fabrice Pardo; Roland Teissier; Nathalie Bardou; Christophe Dupuis; Ronan Mahe; Laurence Ferlazzo; Edmond Cambril; Veronique Thierry-Mieg; Aristide Lemaitre; Jean-Luc Pelouard
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Paper Abstract

New concepts for efficient light absorption in nanoscale metal-semiconductor-metal photodetectors are analyzed from both theoretical and experimental point of view. They are based on sub-wavelength metallic gratings which allows light confinement in tiny volumes (< 100 nm) close to electrodes (< 100 nm). Two photodetector structures are proposed: (i) a resonant-cavity-enhanced subwavelength metal-semiconductor-metal photodetector, and (ii) a nanoscale metal-semiconductor grating photodetector. External quantum efficiency as high as 9 % has been obtained in 40 x 100 nm2 cross-section GaAs wires, limited by fabrication technology. These results show promising features for highly efficient and ultrafast photodetectors.

Paper Details

Date Published: 4 April 2005
PDF: 12 pages
Proc. SPIE 5734, Quantum Dots, Nanoparticles, and Nanoclusters II, (4 April 2005); doi: 10.1117/12.597202
Show Author Affiliations
Stephane Collin, Lab. de Photonique et de Nanostructures, CNRS (France)
Fabrice Pardo, Lab. de Photonique et de Nanostructures, CNRS (France)
Roland Teissier, Lab. de Photonique et de Nanostructures, CNRS (France)
Nathalie Bardou, Lab. de Photonique et de Nanostructures, CNRS (France)
Christophe Dupuis, Lab. de Photonique et de Nanostructures, CNRS (France)
Ronan Mahe, Lab. de Photonique et de Nanostructures, CNRS (France)
Laurence Ferlazzo, Lab. de Photonique et de Nanostructures, CNRS (France)
Edmond Cambril, Lab. de Photonique et de Nanostructures, CNRS (France)
Veronique Thierry-Mieg, Lab. de Photonique et de Nanostructures, CNRS (France)
Aristide Lemaitre, Lab. de Photonique et de Nanostructures, CNRS (France)
Jean-Luc Pelouard, Lab. de Photonique et de Nanostructures, CNRS (France)


Published in SPIE Proceedings Vol. 5734:
Quantum Dots, Nanoparticles, and Nanoclusters II
Diana L. Huffaker; Pallab K. Bhattacharya, Editor(s)

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