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Tönu Pullerits. Portrait.

Tönu Pullerits

Professor

Tönu Pullerits. Portrait.

Nanophotonic-Enhanced Two-Photon-Excited Photoluminescence of Perovskite Quantum Dots

Author

  • Christiane Becker
  • Sven Burger
  • Carlo Barth
  • Phillip Manley
  • Klaus Jäger
  • David Eisenhauer
  • Grit Köppel
  • Pavel Chabera
  • Junsheng Chen
  • Kaibo Zheng
  • Tõnu Pullerits
Show all

Summary, in English

All-inorganic CsPbBr3 perovskite colloidal quantum dots have recently emerged as a promising material for a variety of optoelectronic applications, among others for multiphoton-pumped lasing. Nevertheless, high irradiance levels are generally required for such multiphoton processes. One strategy to enhance the multiphoton absorption is taking advantage of high local light intensities using photonic nanostructures. Here, we investigate two-photon-excited photoluminescence of CsPbBr3 perovskite quantum dots on a silicon photonic crystal slab. By systematic excitation of optical resonances using a pulsed near-infrared laser beam, we observe an enhancement of two-photon-pumped photoluminescence by more than 1 order of magnitude when comparing to using a bulk silicon film. Experimental and numerical analyses allow relating these findings to near-field enhancement effects on the nanostructured silicon surface. The results reveal a promising approach for significantly decreasing the required irradiance levels for multiphoton processes being of advantage in applications such as biomedical imaging, lighting, and solar energy.

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience
  • eSSENCE: The e-Science Collaboration

Publishing year

2018-11-21

Language

English

Pages

4668-4676

Publication/Series

ACS Photonics

Volume

5

Issue

11

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Physical Chemistry (including Surface- and Colloid Chemistry)
  • Materials Chemistry
  • Condensed Matter Physics (including Material Physics, Nano Physics)

Keywords

  • all-inorganic cesium lead halide perovskites
  • metasurface
  • nanophotonics
  • photoluminescence
  • quantum dot
  • two-photon absorption

Status

Published

ISBN/ISSN/Other

  • ISSN: 2330-4022