Using theoretical simulations for optical fiber surface plasmon resonance (SPR) sensor and prism based SPR sensor coated with negative permittivity material (NPM), we investigated the effect of the permittivity of NPM on the transmitted spectrum of optical fiber SPR sensor and the reflected spectrum of prism based SPR sensor, and then obtained optimum permittivity of the NPM which can excite the sharpest SPR spectrum in white light region (400-900 nm).
Gong Dejing, Yuan Yinquan, Liang Lei, Yang Minghong. Theoretical study for negative permittivity of the material which can produce sharp surface plasmon resonance dip[J]. Chinese Optics Letters, 2019, 17(4): .