Whispering　gallery　(WG)　mode　resonators　are　experiencing　a　surge　in　the　application　of　biosensing,　attributing　to　high　speed,　flexibility,　low　cost,　multi-analyte　detection　and　compatibility　with　extra　optical　elements.　The　decoration　of　localized　surface　plasmon　nanostructures　to　a　dielectric　WG　mode　resonator　offers　unprecedented　sensitivity　compared　with　a　pure　dielectric　resonator.　However,　at　the　moment,　the　experimental　quality　(Q)　factors　of　dielectric　micro　rings　always　achieve　the　value　of　104　to　106,　whereas　the　only　reported　hybrid　counterpart　possesses　the　Q　factor　of　300　and　most　studies　are　focused　on　the　theoretical　design.　The　resulting　experimental　detection　limits　(DLs)　are　in　the　range　of　10-6-10-5　RIU,　which　is　one　order　of　magnitude　lower　than　the　best　value　of　hybrid　resonators.　The　hybrid　resonator　should　possess　the　experimental　Q　factor　of　5000　to　10000　so　as　to　match　their　purely　dielectric　rivals.　We　demonstrated　a　novel　hybrid　plasmonic　WG　mode　resonator　working　on　the　multimode　resonance　mechanism.　Under　the　condition　of　the　multimode　resonance,　predominant　field　was　distributed　on　the　waveguide　surface　resulting　in　an　improved　bulk　sensitivity.　The　multimode　resonance　promoted　satisfied　resonance　frequency　reduced　and　thus　a　high　Q　factor　and　a　low　value　of　DL　could　be　achieved　in　the　experiment.　Afterwards,　the　resonator　was　made　via　micro-and　nano-fabrication.　It　was　shown　that　the　experimental　Q　factor　of　5685　and　the　free　spectral　range　larger　than　35　nm,　which　were　superior　to　the　previously　reported　value　to　our　best　knowledge.　Hypoglycemia　and　Hyperglycemia　will　produce　noticeable　organ　damage　over　time.　Early　detection　of　glucose　concentration　is　crucial　for　clinical　diagnosis.　The　proposed　resonator　was　used　for　the　detection　of　glucose　solution.　The　experimental　sensitivity　was　428　nm/RIU　and　the　DL　was　＇1.31　×　10^{-5＇　RIU.　The　device　with　a　footprint　of　＇1500\,　\mu\text{m}　×　12.7\,　\mu\text{m}　＇　,　is　able　to　integrate　with　other　optical　elements　and　developed　as　a　commodity　in　the　future.　©　2001-2012　IEEE.