摘要： An alternative wavelength-modulated heterodyne interferometry based on surface plasmon resonance is proposed for in-situ monitoring of variations in the refractive index of a test sample. Phase variations in surface plasmon resonance are detected by the heterodyne detection system, which uses a wavelength-modulated light source and an unequal-path-length optical configuration. The measurement sensitivity and resolution of the refractive index are greatly enhanced by inserting a quarter-wave plate with a suitable azimuthal angle in front of the SPR sensor. The experimental results indicate that the resolution is better than 3×10−7RIU. 出版者： Elsevier B.V 出版日期： 2013-02-15 出處： Optics communications, 2013-02, Vol.289, p.28-32 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2012 Elsevier B.V. 識別號： ISSN: 0030-4018 識別號： EISSN: 1873-0310 識別號： DOI: 10.1016/j.optcom.2012.10.005
