Near-field imaging and frequency tuning of a high-Q photonic crystal membrane microcavity

Details Near-field imaging and frequency tuning of a high-Q photonic crystal membrane microcavity Near-field imaging and frequency tuning of a high-Q photonic crystal membrane microcavity

2007-09-21

arxiv.org/abs/0709.3483v1

Physics

Condensed Matter

Other Condensed Matter

9 pages, 4 figures

Scientific paper

10.1364/OE.15.017214

We discuss experimental studies of the interaction between a nanoscopic object and a photonic crystal membrane resonator of quality factor Q=55000. By controlled actuation of a glass fiber tip in the near-field of a photonic crystal, we constructed a complete spatio-spectral map of the resonator mode and its coupling with the fiber-tip. On the one hand, our findings demonstrate that scanning probes can profoundly influence the optical characteristics and the near-field images of photonic devices. On the other hand, we show that the introduction of a nanoscopic object provides a low-loss method for on-command tuning of a photonic crystal resonator frequency. Our results are in a very good agreement with the predictions of a combined numerical/analytical theory.

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