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Cover of Nature Photonics 2 (1). ABSTRACT To fulfil the promise
that complete-photonic-bandgap materials hold for optoelectronics
applications, the incorporation of three-dimensionally engineered defects
must be realized. Previous attempts to create and characterize such defects
were limited because of fabrication challenges. Here we report the optical
and structural characterization of complex submicrometre features of
unprecedented quality within silicon inverse opals. High-resolution
three-dimensional features are first formed within a silica colloidal crystal
by means of two-photon polymerization, followed by a high-index replication
step and removal of the opal template to yield embedded defects in
three-dimensional silicon photonic crystals. We demonstrate the coupling of
bandgap frequencies to resonant modes in planar optical cavities and the
first waveguiding of near-infrared light around sharp bends in a
complete-photonic-bandgap material. Rinne S. A., Garcia-Santamaria, & Braun P. V. "Embedded cavities and waveguides in three-dimensional silicon photonic crystals." Nat. Phot. 2, 1 (2008). |
