Plasmonics is a newly emerged field that deals with surface plasmon polaritons (SPPs)-related science and technology. The principles of this phenomenon and its applications are particularly in sensing and detection. Surface plasmon resonance (SPR) is the resonant oscillation of conduction electrons at an interface between the negative and positive permittivity material. SPR is the fundamental concept behind most of the color-based biosensor applications and in different lab-on-a-chip sensors and diatom photosynthesis. In addition, LSPR can be defined as collective electron charge oscillations in metallic nanoparticles which are excited by light. These electrons also exhibit an enhanced near-field amplitude at the resonance wavelength. In this lab, we focus on both LSPR and SPR sensors to detect different types of gases and materials such as LSPR Hydrogen sensor, SPR organic vapors sensor.