Study of 2-D photon crystal Fano slab filters for biological sensing

摘要

A new compact optical Fano filter suitable for biological sensing is proposed,which patterns photon crystal in single crystalline silicon nanomembranes(SiNMs) and transferring onto transparent glass substrates.The effects of air hole size and silicon thickness on the transmission characteristics of new filter are numerically investigated by using three-dimensional finite-difference time-domain(FDTD) technique,the spectral response is also studied by back-filling bioliquid.The results show that the dip wavelength will shift toward longer wavelength by either reducing air hole radius or filling bio-liquid.The number of dips will increase with the increase of silicon thickness.The size of proposed filter can be less than 1 mm2.