Method to measure thye refractive index of a sample using surface plasmon polaritons
Year: 2019
Authors: Giorgini A., Avino S. ,Malara P., Gagliardi G., De Natale P.,
Autors Affiliation: INO-CNR
Journal/Review: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
More Information: tuning the frequency of the first field (4) and/or the value of Δν till the value of the first frequency and the value of the second frequency are such that the first intra-cavity field corresponding to the TE field or TM field component of the first input field (4) is resonating in the optical resonator (10) and the second frequency (v2) at which the second intra-cavity field corresponding to the TM field or TE field component of the second input field (4′) is resonant in the optical resonator (10) simultaneously, obtaining a first resonating frequency and a second resonating frequency; detecting a resonator output power (6) corresponding to the first and second intra-cavity fields resonating in the optical resonator (10); determining a difference between the first resonating frequency (v1) and the second resonating frequency (v2); and calculating the refractive index of the sample (24) from the difference between the first and second frequency.KeyWords: Surface Plasmon Resonance, Sensor, Method