2017
Journal of Lightwave Technology, Q1
Статьи в журналах
Volume 35, Issue 24, 10 November, 2017, pp. 5425 - 5431
Anton Dyshlyuk, Oleg Vitrik, Yuri Kulchin, Eugeniy Mitsai, Artem Cherepakhin, Catherine Branger, Hugues Brisset, Tanta Verona Iordache, Andrei Sarbu / Numerical and experimental investigation of surface plasmon resonance excitation using whispering gallery modes in bent metal-clad single-mode optical fiber // Journal of Lightwave Technology – Vol. 35 – Iss. 24. – 2017. – pp. 5425 - 5431
We present a numerical and experimental study of surface plasmon resonance (SPR) excitation in a bent single-mode optical fiber with metalized cladding. It is shown that with a suitable combination of bend radius and metal film thickness surface plasmon waves can be excited in the film as a result of coupling between fundamental and surface plasmon modes via whispering gallery modes supported by the bent fiber cladding. The coupling brings about a dip in the transmission spectrum at the resonant wavelength which is strongly dependent on the ambient refractive index. This enables one to build a fiber optic SPR-refractometer with a standard single-mode fiber without breaking integrity of the fiber or using any additional elements. Refractometric sensitivity of ~5 μm per refractive index unit and resolution of ~4·10-6 are experimentally demonstrated for the measured refractive index around 1.43. The reported results may find wide application in bio- and chemosensing.
https://doi.org/10.1109/JLT.2017.2772299