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

Research output: Contribution to journalArticle

Abstract

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.

Details

Authors
Organisations
External organisations
  • Zuse Institute Berlin (ZIB)
  • Helmholtz-Zentrum Berlin for Materials and Energy
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Chemistry
  • Materials Chemistry

Keywords

  • all-inorganic cesium lead halide perovskites, metasurface, nanophotonics, photoluminescence, quantum dot, two-photon absorption
Original languageEnglish
Pages (from-to)4668-4676
Number of pages9
JournalACS Photonics
Volume5
Issue number11
Publication statusPublished - 2018 Nov 21
Publication categoryResearch
Peer-reviewedYes