Study on a Transmission-type Biosensor Based on Multiple Total Internal Reflections in Heterodyne Interferometry

• Main Authors: Syue-Ying Li, 李學瑩
• Other Authors: Shinn-Fwu Wang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/kd582z

碩士 === 健行科技大學 === 電子工程系碩士班 === 105 === In the paper, a transmission-type biosensor based on multiple attenuated total reflections in heterodyne interferometry is presented. The biosensor is made of an elongated prism, the height of the reflective elongated prism in the sensing region is D, D=0.6cm. The length of the sensor is L, L=11.6cm, index of outside (n3) is 1.33~1.37. The outside of elongated prism that coated with the two metal film of Ti and Au. As a heterodyne light is passed through the reflective elongated prim, it will induce the phase shift difference between the S- and P-polarization lights due to the attenuated total reflections (ATRs) effect. Substituting the phase shift difference into Fresnel’s equations, the related parameters of the tested medium can be calculated. The biosensor has some merits, such as, small volume, high resolution, high sensitivity, and stability, etc.