Metallic　photonic　crystals　(MPC)　consisting　of　gold　nanowires　on　a　waveguide　layer　of　indium　tin　oxide　(ITO)　has　been　fabricated　using　interference　ablation.　A　sensor　device　based　on　this　kind　of　waveguide　MPCs　is　demonstrated　by　the　measurements　on　the　concentration　change　in　the　glucose/water　solution.　A　special　definition　is　formulated　for　the　amplitude　sensor　signal　for　such　a　sensor　device,　which　shows　excellent　linear　dependence　on　the　change　in　the　environmental　refractive　index.　©　(2012)　Trans　Tech　Publications,　Switzerland.