SPR sensor by method of electro-optic phase modulation and polarization interferometry

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（z1）
• 页码范围: 185-187
• 页数: 3页
• 语种: 英文
• DOI: 10.3788/COL201210.S12401

摘要

We propose a surface plasmon resonance (SPR) sensor based on phase modulation and polarization interferometry,both of which provide a refractive index (RI) resolution of the same order as that of SPR sensors of the phase type.And it has a wide dynamic range and insensitivity of RI resolution to the thickness of metal films as that of the intensity type SPR sensors.In this letter,we choose electro-optic (EO) phase modulation instead of the angle modulation.We demonstrate theoretically that with the EO phase modulation,our sensor could provide a better RI resolution.