Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 30: Photonics 2

Q 30.1: Talk

Wednesday, March 16, 2011, 10:30–10:45, SCH A118

Sensing with coupled microcavity systems — •Sandra Isabelle Schmid and Jörg Evers — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

In recent years microresonators have become more and more important for optical research. Their special properties as low loss rates and ultra high Q values offer a lot of advantages for applications and experiments. They can be used as optical filters or even as ultra fast switching devices [1,2].

We consider systems of coupled Whispering Gallery Mode (WGM) resonators. In such toroidal cavities WGM modes always occur in pairs of modes of the same frequency but opposite propagation directions. If another cavity or object is located very close to a resonator, an interaction via the evanescent field can take place. In our research we investigate the transmission and reflection properties of arrays built of microresonators. Our observables are the transmission and reflection intensities.

Moreover, we study systems consisting of microcavities coupled to nearby atoms. In [3] was shown, that a nearby two-level atom crucially influences the output fluxes of a single cavity. Therefore, we are interested in the impact of a nearby atom on an array of microcavities. We study the transmission and reflection spectra in detail and discuss possible applications.

[1] K. Vahala, Nature 424, 839 (2003).

[2] M. A. Popovic et al., Optics Express 14, 3 (2006).

[3] B. Dayan et al., Science 319, 1062 (2008).