Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.57: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II
Towards Cavity Nanoscopy — •Matthias Mader1,2, Hanno Kaupp1,2, Louis Costa1,2, Christian Deutsch1,2, Jakob Reichel3, Theodor W. Hänsch1,2, and David Hunger1,2 — 1Ludwig-Maximilians-Universität, München, Deutschland — 2Max-Planck-Institut für Quantenoptik, Garching, Deutschland — 3Laboratoire Kastler Brossel, E.N.S. Paris, Frankreich
The sensitivity for observing nano-objects with conventional microscopy is limited by their small cross section. Exploiting multiple interactions of light with nanoscale objects inside an optical resonator increases the sensitivity for detecting nano-particles. To realize high spatial resolutions under these conditions, microscopic mode cross sections within the cavity are required. These requirements are fulfilled by fiber-based Fabry-Pérot type cavities. This type of optical resonator provides a high finesse, a small mode volume and easy free-space access. The cavity is made of a laser-machined and high-reflective coated end facet of a single mode optical fiber and a plane macroscopic mirror.
Scanning the plane mirror under the fiber enables spatial resolved detection and spectroscopy of single nanoparticles on top of this mirror.
This opens the possibility for highly sensitive spatially resolved spectroscopy of a wide variety of nano-objects.
We report first results of experiments on absorption spectroscopy and cavity nanoscopy with gold nanoparticles.