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A near-field actuated optical nanocavity

Abstract : We demonstrate here that switching and tuning of a nanocavity resonance can be achieved by approaching a sub-micrometer tip inside its evanescent near-field. The resonance energy is tuned over a wide spectral range (/~10-3) without significant deterioration of the cavity peaktransmittance and of the resonance linewidth. Such a result is achieved by taking benefits from a weak tip-cavity interaction regime in which the tip behaves as a pure optical path length modulator
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Benoit Cluzel, Loïc Lalouat, Philippe Velha, Emmanuel Picard, David Peyrade, et al.. A near-field actuated optical nanocavity. Optics Express, Optical Society of America, 2008, 16 (1), pp.279-286. ⟨hal-00669767⟩

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