Smith, Cameron L CWu, Darran K CLee, MichaelMonat, ChristelleTomiljenovic-Hanic, SnjezanaFreeman, DarrenMadden, SteveGrillet, ChristianLuther-Davies, BarryGiessen, HaraldEggleton, Benjamin J2015-12-101605-7422http://hdl.handle.net/1885/52312We demonstrate post-processed and reconfigurable photonic crystal double-heterostructure nanocavities via selective fluid infiltration. We experimentally investigate the microfluidic structures via evanescent probing from a tapered fiber at telecommunications wavelengths. We demonstrate a cavity with quality factor Q = 4,300. The defect-writing technique we present does not require nanometer-scale alterations in lattice geometry and may be undertaken at any time after photonic crystal waveguide fabrication.Keywords: Double-heterostructures; Fluid infiltration; Lattice geometry; Nanocavity; Telecommunications wavelengths; Crystal lattices; Heterojunctions; Infiltration; Microfluidics; Wavelength; Photonic crystals Double-heterostructure; Microfluidic; Nanocavity; Photonic crystal200810.1117/12.7650892015-12-09