LAUSR

Abstract Thin films based one-dimensional photonic crystal for refractive index sensing has been theoretically and experimentally investigated in this article. The sensing elements are porous one-dimensional photonic crystal deposited on multimode fiber end face by e-beam evaporation. Theoretical simulation shows that the resonant mode of the photonic crystal shifts to longer wavelength since the thin film pores are filled with higher refractive index solutions. Experimental results on refractive index detection show that the wavelength shift is 10.66 nm when refractive index ranges from 1.3333 to 1.4584; especially the wavelength shift of the proposed sensor has linear dependence relation with the refractive index variation.