Integrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses

Silke L Diedenhofen; Dominik Kufer; Tania Lasanta; Gerasimos Konstantatos

doi:10.1038/lsa.2015.7

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Integrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses

Original Articles

- Integrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses
- Light: Science & Applications Vol. 4, Issue 1, (2015)
- Affiliations：
  
  ICFO – Institut de Ciències Fotòniques, Barcelona 08860, Spain
- Author bio：
  
  G Konstantatos, ICFO – Institut de Ciències Fotòniques, Av. Carl Friedrich Gauss 3, Mediterranean Technology Park, Castelldefels, Barcelona 08860, SpainE-mail: gerasimos.konstantatos@icfo.es
- Funds：
- DOI：10.1038/lsa.2015.7
  CLC：
- Published：2015-03，
  
  Published Online：14 November 2014，
  
  Received：14 May 2014，
  
  Revised：31 October 2014，
  
  Accepted：04 November 2014
- Accepted：
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Diedenhofen, S. L. et al. Integrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses. Light: Science & Applications, 4, e234 (2015).
DOI：

Diedenhofen, S. L. et al. Integrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses. Light: Science & Applications, 4, e234 (2015). DOI： 10.1038/lsa.2015.7.

摘要

Abstract

High-sensitivity photodetection is at the heart of many optoelectronic applications

including spectroscopy

imaging

surveillance

remote sensing and medical diagnostics. Achieving the highest possible sensitivity for a given photodetector technology requires the development of ultra-small-footprint detectors

as the noise sources scale with the area of the detector. This must be accomplished while sacrificing neither the optically active area of the detector nor its responsivity. Currently

such designs are based on diffraction-limited approaches using optical lenses. Here

we employ a plasmonic flat-lens bull's eye structure (BES) to concentrate and focus light into a nanoscale colloidal quantum dot (CQD) photodetector. The plasmonic lenses function as nanofocusing resonant structures that simultaneously offer color selectivity and enhanced sensitivity. Herein

we demonstrate the first CQD photodetector with a nanoscale footprint

the optically active area of which is determined by the BES; this detector represents an exciting opportunity for high-sensitivity sensing.

关键词

Keywords

PbS quantum dotsphotodetectorsplasmonic bull's eye structuresplasmonic lens

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