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Ultrasharp edge filtering in nanotethered photonic wires

Abstract : Within a suspended photonic wire, the periodically-spaced nanotethers sustaining the wire can behave as damped transverse resonators that interact with the partially reflecting effect of the wire-tether intersection, and thus modify the Bragg reflection mechanism. This specific resonant mechanism is explored using a transfer matrix model, and is shown to result in an ultrasharp filter edge. This sharp behavior is evidenced experimentally on 300-400-nm-wide InP suspended wires through transmission data and further consolidated by optical low coherence reflectometry time-frequency analysis.
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Anne Talneau, Isabelle Sagnes, R. Gabet, Yves Jaouen, Henri Benisty. Ultrasharp edge filtering in nanotethered photonic wires. Applied Physics Letters, American Institute of Physics, 2010, 97, pp.191115. ⟨10.1063/1.3513279⟩. ⟨hal-00679133⟩

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