Fabrications of Surface Plasmon Resonance (SPR) on Tapered Fiber Structure for Optical Sensor#

Abstract

: Improvement of tapered fiber sensor by introducing gold thin layer for facilitating surface plasmon resonance (SPR) generation has been studied. The particular interest in this problem is the conditions that determine the formation of evanescent field and the interrogation of the transmission intensity change due to the evanescent field absorption. The fabrication of the tapered fiber was conducted by a technique based on flame brushing using a homemade fiber tapering rig. The heat source comes from an oxy-butane torch. The gold nanolayer was then deposited onto the surface of tapered fiber by sputtering technique. The results suggest that a compact sensor based on this structure may be useful for biochemical sensors.