Abstract
We report the effect of metal-island size variation in nanoparticle-enhanced photodetectors. Nanoparticle size was controlled by varying the deposition and annealing conditions used to produce the metal-island films. Increasing the size of silver-island particles fabricated onto 165 nm thick silicon-on-insulator (SOI) photodetectors resulted in a dramatic increase in the observed photocurrent. A nearly factor-of-20 photocurrent enhancement was observed for light of wavelength 800 nm, a significant improvement over previously reported results. The improvement is linked to two physical effects: the increased scattering efficiency of the larger nanoparticles and a qualitative change in the resonance characteristics of the metal-island film due to radiative coupling to the SOI waveguide modes.
Keywords
PhotocurrentMaterials sciencePhotodetectorSilicon on insulatorOptoelectronicsAnnealing (glass)NanoparticleSiliconWavelengthNanotechnologyComposite material
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Publication Info
- Year
- 1998
- Type
- article
- Volume
- 73
- Issue
- 26
- Pages
- 3815-3817
- Citations
- 516
- Access
- Closed
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Cite This
Howard R. Stuart,
Dennis G. Hall
(1998).
Island size effects in nanoparticle-enhanced photodetectors.
Applied Physics Letters
, 73
(26)
, 3815-3817.
https://doi.org/10.1063/1.122903
Identifiers
- DOI
- 10.1063/1.122903