6533b836fe1ef96bd12a074f

RESEARCH PRODUCT

Back-scattering of whispering-gallery-modes resonances of cylindrical microcavities: Refractometric applications

Benito GimenoVanessa ZamoraAntonio DiezMiguel V. Andrés

subject

Total internal reflectionMaterials sciencebusiness.industryScatteringPhysics::OpticsPhysics::Fluid DynamicsWavelengthOpticsSurface waveReflection (physics)OptoelectronicsWhispering-gallery wavebusinessRefractive indexRefractometry

description

Whispering-gallery modes (WGM) resonances of microcapillaries are directly compatible with microfluidic systems and have demonstrated its suitability for refractometric applications [1]. Microcapillaries with a submicrometric wall exhibit very large wavelength shifts as a function of the refractive index of the liquids that fill the inside of the capillary [2]. The spatial separation between the surface where the total internal reflection takes place (the outer surface) and the sensing surface (the inner surface) where the wave interacts with the analyte is a unique property that can be exploited to deal with analytes with a refractive index higher than that of the capillary [2].

https://doi.org/10.1109/cleoe-eqec.2009.5196325