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Q: Quantenoptik

Q 413: Quanteneffekte III

Q 413.4: Vortrag

Donnerstag, 7. März 2002, 14:45–15:00, HS 01/E02

Interferometric signatures of single molecules — •Taras Plakhhotnik and Taras Plakhhotnik — Physical Chemistry Laboratory, ETH-Zurich, 8093 Zurich, Switzerland

We built an interferometer where one of the two slits of a classical Young’s setup is replaced by a single molecule (SM) embedded in a solid matrix and show that an excellent signal-to-noise ratio can be achieved in a straightforward way. This enabled us to measure directly the first order coherence of the SM emission, which at high excitation powers proves to be split in coherent and incoherent parts. We demonstrate an order of magnitude higher precision in axial localization of SMs in comparison with that of confocal microscopy. These experiments open a possibility for SM holography. Detection of single molecules with low luminescence quantum yields could be another application of this technique.

References

[1] T. Plakhotnik and V. Palm, Phys. Rev. Lett. 87 (2001) 183602.