Die Forschung konzentriert sich auf Nanophotonik und Quantenoptik, insbesondere die Entwicklung plasmonischer Nanostrukturen für die Erzeugung und Detektion von Infrarot-Photonen. Es werden theoretische Modelle und numerische Simulationen eingesetzt, um Licht-Materie-Wechselwirkungen in hybriden Systemen aus Metallen und 2D-Materialien wie Wolframdisulfid zu analysieren. Ein weiterer Schwerpunkt liegt auf der materialwissenschaftlichen Charakterisierung mittels Raman-Spektroskopie und der Entwicklung neuartiger Quantenlichtquellen sowie sensibler Detektoren auf Nanoskala.
🔒 Das System hat 492 mögliche Industrie-Partner gefunden — Firmen, Scores und Begründungen sind nur für eingeloggte Nutzer:innen sichtbar. Anmelden
Dr. Günter Kewes
HU-FIS-Profil ↗SFB 951/3: Plasmonische Tunnelkontakte zur Erzeugung und Detektion von Infrarot-Photonen (TP B18)
university
SFB 951/3: Plasmonische Tunnelkontakte zur Erzeugung und Detektion von Infrarot-Photonen (TP B18)
other
SFB 951/3: Plasmonische Tunnelkontakte zur Erzeugung und Detektion von Infrarot-Photonen (TP B18)
other
Förderer: DFG Sonderforschungsbereich Zeitraum: 07/2019 - 06/2023 Projektleitung: Dr. Günter Kewes, Prof. Dr. rer. nat. Oliver Benson
Applied Physics Letters · DOI
Using a nanomanipulation technique a nanodiamond with a single nitrogen vacancy center is placed directly on the surface of a gallium phosphide photonic crystal cavity. A Purcell-enhancement of the fluorescence emission at the zero phonon line (ZPL) by a factor of 12.1 is observed. The ZPL coupling is a first crucial step toward future diamond-based integrated quantum optical devices.
Nano Letters · DOI
An alignment free, micrometer-scale single photon source consisting of a single quantum emitter on an optical fiber operating at room temperature is demonstrated. It easily integrates into fiber optic networks for quantum cryptography or quantum metrology applications.(1) Near-field coupling of a single nitrogen-vacancy center is achieved in a bottom-up approach by placing a preselected nanodiamond directly on the fiber facet. Its high photon collection efficiency is equivalent to a far-field collection via an objective with a numerical aperture of 0.82. Furthermore, simultaneous excitation and re-collection through the fiber is possible by introducing a fiber-connected single emitter sensor.
Review of Scientific Instruments · DOI
Integrated quantum optical hybrid devices consist of fundamental constituents such as single emitters and tailored photonic nanostructures. A reliable fabrication method requires the controlled deposition of active nanoparticles on arbitrary nanostructures with highest precision. Here, we describe an easily adaptable technique that employs picking and placing of nanoparticles with an atomic force microscope combined with a confocal setup. In this way, both the topography and the optical response can be monitored simultaneously before and after the assembly. The technique can be applied to arbitrary particles. Here, we focus on nanodiamonds containing single nitrogen vacancy centers, which are particularly interesting for quantum optical experiments on the single photon and single emitter level.