Consiglio Nazionale Delle Ricerche

Universitá Degli Studi Di Padova

Università Di Padova

Gianluca Ruffato

Filippo Romanato

Chee Cheong Wong

Lee Kwang Hong

Husen Kartasamita Kang

Enzo Rotunno

Vincenzo Grillo

It is disclosed a device for multipole phase division multiplexing and demultiplexing and a spatial division telecommunications system comprising the multiplexing and demultiplexing devices. The multipole phase demultiplexing device comprises a cascade of a beam transformer and a phase corrector, wherein the beam transformer performs a circular-sector transformation of a plurality of multipole phase electromagnetic beams. The multipole phase multiplexing device comprises a cascade of a beam transformer and a phase corrector, wherein the beam transformer performs a combination of |m | circular-sector transformations of a plurality of tilted electromagnetic beams.

Device for multipole phase division demultiplexing/multiplexing and spatial division telecommunications system thereof

A method and a system for the enhancement of the sensitivity in surface plasmon resonance (SPR) sensors based metallic grating by exploiting the conical configuration is presented. We consider the propagation of surface plasmon polaritons (SPPs) excited by light from the visible to infrared spectrum range, incident on a plasmonic grating at different directions by varying both the zenith and azimuthal angles. For specific azimuthal angles, SPPs propagate in the grating plane perpendicular to the incident light momentum. This is the condition that allows increasing the number of different excited SPPs modes largely. We exploit this effect to increase the sensor sensitivity with the change of refractive index of thin film on the plasmonic grating surface. Polarization effects also contribute to a further modes enhancement and increase the sensitivity. A scheme for a lab-on-chip implementation of a system that allows a parallel detection in microfluidic channels has been shown.

Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control

Growing community of inventors

Padua, Italy

Gianluca Ruffato