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Short Bragg mirrors with adiabatic modal conversion

Abstract : A silicon-on-insulator waveguide-based microcavity with short tapers has been realized by incorporating two identical eight-groove tapers at the two reflector extremities. The microstructure has an overall length of 14 μm and consists of two first-order Bragg mirrors with narrow slits (90 nm) and of four series of slits with progressively varying widths (tapers). A comparison with a nontapered cavity evidences the beneficial effect of the taper, a lowering of the radiation losses.
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David Peyrade, Eric Silberstein, Philippe Lalanne, Anne Talneau, Yong Chen. Short Bragg mirrors with adiabatic modal conversion. Applied Physics Letters, American Institute of Physics, 2002, 81 (2), pp.829-831. ⟨10.1063/1.1497722⟩. ⟨hal-00878129⟩

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