A method for measuring two-dimensional refractive index distribution with the total internal reflection of p-polarized light and the phase-shifting interferometry

2006 ◽  
Vol 268 (1) ◽  
pp. 23-26 ◽  
Author(s):  
Zhi-Cheng Jian ◽  
Po-Jen Hsieh ◽  
Hung-Chih Hsieh ◽  
Huei-Wen Chen ◽  
Der-Chin Su
Keyword(s):  
Refractive Index ◽  
Total Internal Reflection ◽  
Polarized Light ◽  
Internal Reflection ◽  
Phase Shifting ◽  
Two Dimensional ◽  
Refractive Index Distribution ◽  
Phase Shifting Interferometry ◽  
Index Distribution

scholarly journals Sensing of Surface and Bulk Refractive Index Using Magnetophotonic Crystal with Hybrid Magneto-Optical Response

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1984
Author(s):  
Daria Ignatyeva ◽  
Pavel Kapralov ◽  
Polina Golovko ◽  
Polina Shilina ◽  
Anastasiya Khramova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Refractive Index ◽  
Photonic Crystal ◽  
Total Internal Reflection ◽  
Polarized Light ◽  
Optical Response ◽  
Internal Reflection ◽  
Surface Mode ◽  
Optical Resonance ◽  
Near Surface

We propose an all-dielectric magneto-photonic crystal with a hybrid magneto-optical response that allows for the simultaneous measurements of the surface and bulk refractive index of the analyzed substance. The approach is based on two different spectral features of the magneto-optical response corresponding to the resonances in p- and s-polarizations of the incident light. Angular spectra of p-polarized light have a step-like behavior near the total internal reflection angle which position is sensitive to the bulk refractive index. S-polarized light excites the TE-polarized optical Tamm surface mode localized in a submicron region near the photonic crystal surface and is sensitive to the refractive index of the near-surface analyte. We propose to measure a hybrid magneto-optical intensity modulation of p-polarized light obtained by switching the magnetic field between the transverse and polar configurations. The transversal component of the external magnetic field is responsible for the magneto-optical resonance near total internal reflection conditions, and the polar component reveals the resonance of the Tamm surface mode. Therefore, both surface- and bulk-associated features are present in the magneto-optical spectra of the p-polarized light.

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