Correlated, Dual-Beam Optical Gating in Coupled Organic–Inorganic Nanostructures

Kai M. Wurst, Markus Bender, Jannika Lauth, Sonam Maiti, Thomas Chassé, Alfred Meixner, Laurens D.A. Siebbeles, Uwe H.F. Bunz, Kai Braun, Marcus Scheele

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
8 Downloads (Pure)

Abstract

An optical switch with two distinct resonances is formed by combining PbS nanocrystals and the conductive polymer poly[sodium 2-(2-ethynyl-4-methoxyphenoxy)acetate] (PAE) into a hybrid thin film. Infrared excitation of the nanocrystals invokes charge transfer and consecutive polaron formation in the PAE, which activates the switch for excited-state absorption at visible frequencies. The optical modulation of the photocurrent response of the switch exhibits highly wavelength-selective ON/OFF ratios. Transient absorption spectroscopy shows that the polaron formation is correlated with the excited state of the nanocrystals, opening up new perspectives for photonic data processing. Such correlated activated absorption can be exploited to enhance the sensitivity for one optical signal by a second light source of different frequency as part of an optical amplifier or a device with AND logic.

Original languageEnglish
Pages (from-to)11559-11563
JournalAngewandte Chemie - International Edition
DOIs
Publication statusPublished - 2018

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • conductive polymers
  • coupled organic–inorganic nanostructures
  • photoswitches
  • polarons

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