The study of the modulation of intensity and phase of transmitted light induced by the variation of the refractive index of a medium on top surface of a resonant waveguided grating

• Main Authors: WANG, CHIA-MING, 王家銘
• Other Authors: HSU, CHIA-CHEN
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/trx4su

碩士 === 國立中正大學 === 物理系研究所 === 104 === The purpose of this thesis is to propose a new technique of measurement, through the phase difference of TM and TE modes of transmission light of grating structure for GMR, a technique of measuring variation of reflective index based on phase difference can be established. The basic principle of this method is to use Stokes parameter to sketch Poincare sphere, then calculate phase difference to obtain the relationship between the change of reflective index and phase difference. By measuring the sample covered by sugar water, the phase difference measurement shows that the detection sensitivity is ten times more than variation of transmission does. As for the sample which is covered by DE-PMMA, the sensitivity is higher for measurement based on phase difference than measuring the change in transmission.