Author/Authors :
Lin، نويسنده , , Sheng-Fu and Wang، نويسنده , , Chih Ming and Tsai، نويسنده , , Ya Lun and Ding، نويسنده , , Ting Jou and Yang، نويسنده , , Tsung Hsun and Chen، نويسنده , , Wen Yih and Yeh، نويسنده , , Song Feng and Chang، نويسنده , , Jenq Yang، نويسنده ,
Abstract :
A modified waveguide model for predicting the sensitivity of surface-relief guided mode resonance (GMR) biosensors is presented. The proposed model is a convenient and fast calculation method compared to the current optical simulation tools such as the rigorous couple wave analysis (RCWA). A systematic and theoretical discussion of the GMR geometric structure and sensitivity of the modified model for biosensing is also presented. For a given GMR material, the theoretical maximum sensitivity can be achieved by choosing the proper geometric structure from the model simulations. A comparison of the GMR biosensor sensitivity respectively calculated by the model and the RCWA method shows good agreement. Finally, a suspending GMR structure with a 4.5-fold increase in sensitivity compared to the traditional surface-relief GMR is proposed.
Keywords :
Bulk sensitivity , waveguide , Optical biosensors , Guided mode resonance device
