We　investigated　enhancement　of　sensitivity　of　sensors　based　on　metallic　photonic　crystals　through　tuning　the　thickness　of　the　waveguide　layer　by　pulsed　laser　deposition.　Thicker　waveguides　made　of　InGaZnO　allow　double　resonance　of　Fano　coupling　modes　due　to　plasmonic-photonic　interactions.　Tuning　the　angle　of　incidence　enables　overlap　between　these　doubly　resonant　modes,　which　induces　much　enlarged　and　spectrally　narrowed　sensor　signals,　leading　to　significantly　enhanced　sensitivity　of　the　sensor　device.　The　thickness　of　the　waveguide　layer　is　found　to　be　a　crucial　structural　parameter　to　improve　sensitivity　of　the　MPC　sensors.　(C)　2014　Optical　Society　of　America