Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics III
Q 42.59: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
A microfluidic high-finesse open acces cavity — •Matthias Mader1,2, Theodor W. Hänsch1,2, and David Hunger2,1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching — 2Ludwig-Maximilians-Universität München, Schellingstraße 4, 80799 München
Optical characterisation of individual nanosystems provides a wealth of information. However, it is very challenging to observe quantitative spectroscopy signals beyond fluorescence from a single nanoparticle.
Here we present first steps towards a novel method for extinction and dispersion spectroscopy on single nanosystems in an aqueous environment to investigate single biological and chemical nano systems.
Combining an open access high-finesse Fabry-Perot resonator [1] with a microfluidic cell allows ultra-sensitive spectroscopy of individual nano systems under well-controlled conditions. In addition to dispersive detection of the nano object by detecting a shift in the resonance frequency, absorption measurements are possible by observing the transmitted light [2]. Using the cavity mode which is fully accessible for the particle as an optical trap, our approach opens the possibility to store a particle without binding to a surface and to investigate e.g. reaction dynamics on a single particle level.
[1] D. Hunger, T. Steinmetz, Y. Colombe, C. Deutsch, T. W. Hänsch, J. Reichel, New J. Phys. 12, 065038 (2010).
[2] M. Mader, J. Reichel, T. W. Hänsch, D. Hunger, Nature Commns. 6 7249 (2015)