Frontiers of Optoelectronics, 2009, 2 (2): 182, 网络出版: 2012-10-08
Transmission-type SPR sensor based on coupling of surface plasmons to radiation modes using a dielectric grating
Transmission-type SPR sensor based on coupling of surface plasmons to radiation modes using a dielectric grating
摘要
Abstract
Atransmission-type surface plasmon resonance (SPR) sensor is presented. In the transmission-type SPR structure, surface plasmonwaves are outcoupled to radiation modes by the use of dielectric grating on a thin-film layer of Ag. Compared with the traditional reflection-type SPR sensor, the new method provides larger detectable range, which might be useful to investigate thick targets such as in cell analysis. Theoretical simulations show that the structures provide high transmission efficiency for surface plasmon resonance and the devices present extremely linear sensing characteristics. Furthermore, it is found that the transmission efficiency and the refractive index detection sensitivity of the SPR sensor can be improved by the use of a lower refractive index glass prism.
Changkui HU, Deming LIU. Transmission-type SPR sensor based on coupling of surface plasmons to radiation modes using a dielectric grating[J]. Frontiers of Optoelectronics, 2009, 2(2): 182. Changkui HU, Deming LIU. Transmission-type SPR sensor based on coupling of surface plasmons to radiation modes using a dielectric grating[J]. Frontiers of Optoelectronics, 2009, 2(2): 182.