▎ 摘　　要

Theoretical investigation of special types of efficient nanoplasmonic sensors with monometallic and bimetallic Kretschmann configurations using silver and gold has been explored. Conventional Kretschmann structure has been modified using WS2 or graphene for improving the performance of the sensor. We further show that incorporation of both WS2 and graphene in the proposed structure is more advantageous. Some interesting theoretical results concerned with sensing of biological sample using this structure have also been presented.