Plasmonics is a new field of photonics that has shown promise in a variety of practical applications. This technology has a lot of potential for developing light-sensitive sensors and better optical devices. Surface-plasmon resonance (SPR) monitors are distinguished by their ability to detect minute surface alterations. A significant amount of effort has gone into developing a surface plasmon resonance-based optical sensor that is both fast and sensitive. This device's primary application is in medical, specifically for early disease diagnosis. This study looks at numerous elements that were explored in order to improve the monitor's sensitivity. Form symmetry and the surface plasmon resonance (SPR) mode are two instances of this