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

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 ah ybrid thin film. Infrared excitation of the nanocrystals invokes charge transfer and consecutive polaron formation in the PAE, which activates the switch for excitedstate absorption at visible frequencies.The optical modulation of the photocurrent response of the switch exhibits highly wavelength-selective ON/OFF ratios.T ransient absorption spectroscopys hows that the polaron formation is correlated with the excited state of the nanocrystals,o pening up new perspectives for photonic data processing.S uch correlated activated absorption can be exploited to enhance the sensitivity for one optical signal by as econd light source of different frequency as part of an optical amplifier or adevice with AND logic.

Short-range organization and photophysical properties of CdSe quantum dots coupled with aryleneethynylenes

“…Since they can furthermore be produced with low energy effort and are applicable in thin films with little material consumption, they hold great promise for a sustainable internet of things [6][7][8]. Hybrid organic-inorganic materials are for example powerful candidates for optical communication [9], spin memory [5] and photon upconversion applications [10] as well as for solar cells with increased efficiency [11]. For all these applications, the organic-inorganic interface and charge and energy transfer processes through it are of key relevance [5,11].…”

Deutsche Bunsengesellschaft Awards

“…E rw ar Postdoktorand bei Gerhard Ertl am Fritz-Haber-Institut der Max-Planck-Gesellschaft in Berlin und begann 1999 seine akademische Laufbahn als Assistenzprofessor im Department Chemie der Uni-versitätL eiden. In einer Angewandte-Chemie-Zuschrift berichteten sie über optische Schaltprozesse in gekoppelten organisch-anorganischen Nanostrukturen [2]. Bonn erforscht die Struktur und Dynamik von Molekülen und intermolekularen Wechselwirkungen an Grenzflächen sowie den Tr ansport von Molekülen und Ladungen über Grenzflächen.…”

“…wandte Chemie they reported on optical gating in coupled organic-inorganic nanostructures. [2] Ewald Wicke Award for Fabian Holzmeier Holzmeier investigates the photoionization of small and intermediate-sized molecules in the gas phase with vacuum ultraviolet and soft X-ray radiation provided by synchrotron, free electron laser,a nd high harmonic generation light sources.Heisinterested in ultrafast dynamics in molecules on atime scale of few femto-to attoseconds.H ew as among the authors of aC ommunication in Angewandte Chemie on the isomer-selective generation and spectroscopic characterization of picolyl radicals. [3]…”

Preise der Bunsengesellschaft

“…einer Angewandte-Chemie-Zuschrift berichteten sie über optische Schaltprozesse in gekoppelten organisch-anorganischen Nanostrukturen. [2] Ewald-Wicke-Preis für Fabian Holzmeier [3] Kurz notiert Über Fabian Dielmann (UniversitätM ünster) war hier zuletzt zu lesen, als er 2018 einen FCI-Dozentenpreis gewann. [4a] 2019 erhält er einen Heinz-Maier-Leibnitz-Preis der Deutschen Forschungsgemeinschaft fürW issenschaftler unter 40 Jahren.…”