Single-atom detection using whispering gallery modes of microdisk resonators

Details Single-atom detection using whispering gallery modes of microdisk resonators Single-atom detection using whispering gallery modes of microdisk resonators

2004-07-28

arxiv.org/abs/quant-ph/0407229v1

Phys. Rev. A 70, 053808 (2004)

Physics

Quantum Physics

10 pages, 10 fugures

Scientific paper

10.1103/PhysRevA.70.053808

We investigate the possibility of using dielectric microdisk resonators for the optical detection of single atoms trapped and cooled in magnetic microtraps near the surface of a substrate. The bound and evanescent fields of optical whispering gallery modes are calculated and the coupling to straight waveguides is investigated using finite-difference time domain solutions of Maxwell's equations. Results are compared with semi-analytical solutions based on coupled mode theory. We discuss atom detection efficiencies and the feasibility of non-destructive measurements in such a system depending on key parameters such as disk size, disk-waveguide coupling, and scattering losses.

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