Ignacio Del Villar

TL;DR: The deposition of an overlay of higher refractive index than the cladding in a Long Period Fiber Grating permits to improve the sensitivity to ambient refractiveIndex changes in a great manner, and henceforward fast shifts of the resonance wavelength of the attenuations bands in the transmission spectrum are studied.

TL;DR: Repeated experiments confirm a big leap in performance thanks to the capability to detect femtomolar concentrations in human serum, improving the detection limit by 3 orders of magnitude when compared with other fiber-based configurations.

TL;DR: Lossy mode resonances can be obtained in the transmission spectrum of cladding removed multimode optical fiber coated with a thin-film and basic rules of design, which enable the selection of the best parameters for each specific sensing application, are indicated in this work.

TL;DR: Lossy-mode resonance (LMR)-based optical sensing technology has emerged in the last two decades as a nanotechnological platform with very interesting and promising properties as mentioned in this paper, which enables one to tune the position of the resonance in the optical spectrum, to excite the resonance with both transverse electric (TE) and transverse magnetic (TM) polarized light.

TL;DR: A theoretical model for analyzing a multilayer cylindrical waveguide is presented that permits the phenomenon to be understood and predicted and results are corroborated with experimental ones obtained by electrostatic self-assembly.