کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1537984 | 996600 | 2011 | 5 صفحه PDF | دانلود رایگان |

In this study an alternative method based on surface plasmon resonance is proposed for in-situ monitoring of variation in the refractive index of a test sample. A wavelength-modulated light source and an unequal-path-length optical configuration heterodyne interferometer are used to detect the phase difference change, which can then be used to estimate the change in the refractive index of a test sample. The experimental results demonstrate a phase stability of 0.02°. The resolution power of the refractive index is 1.5 × 10− 6 RIU. This method has several advantages over previously used methods such as simple optical setup, easier operation in real time, and low cost.
Research Highlights
► Heterodyne interferometry consists of wavelength-modulated light and unbalanced path.
► Surface plasmon resonance phase is detected by WM heterodyne interferometry.
► In-situ monitoring of variation in the refractive index of a test sample.
Journal: Optics Communications - Volume 284, Issue 4, 15 February 2011, Pages 925–929