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Q: Fachverband Quantenoptik und Photonik

Q 32: Biophotonics

Q 32.5: Vortrag

Mittwoch, 2. März 2016, 12:00–12:15, f342

Microcavity based detection of single ions interacting with plasmonic nanorods — •Martin D. Baaske and Frank Vollmer — Max-Planck-Institut für die Physik des Lichts, Erlangen, Germany

Whispering gallery mode based microresonators provide powerful tools for the all optical detection of nanoscopic objects such as nanoparticles and viruses[1,2]. Their sensitivity can further be boosted by modification of the microcavities with resonant plasmonic nanoparticles allowing for the detection of single molecules and their interactions[3].

Here we present experimental data on the microcavity based observation of single ions interacting with immobilized plasmonic nanorods in aqueous environment. We show that different types of interactions can be identified by their transient behavior. Furthermore we discuss the influence of the solution’s ionic strength on the type of interaction observed for bivalent ions of two different elements.

L. He et al., Nature Nanotech., 6, 428 (2011)
F. Vollmer et al., PNAS, 105, 20701 (2008)
M.D. Baaske et al., Nature Nanotech., 9, 933 (2014)