Polytechnic University of Valencia

Alejandro Jose Martinez Abietar

Javier Marti Sendra

Jaime Garcia Ruperez

Carlos Garcia Meca

This invention describes a photonic sensing method and device based on the periodic dielectric structures of photonic forbidden band, in which the sensing process is carried out through the measurement of variation in signal amplitude as it exits the device. The variation in amplitude is due to a variation in the refraction index of the structure, as a consequence of the presence of the substances that are the object of the sensing. Among the advantages provided by the invention, it is worth mentioning its simplicity in the sensing process; its high level of integration, allowing for a design of reduced proportions; and its adaptability to dielectric structures of one, two or three dimensions.

Photonic sensing method and device

The invention relates to an optical security mark that can be applied to an object, said mark comprising a structure made of a metamaterial that generates a magnetic response to incident radiation having a wavelength (&#x3bb;) corresponding to a specific code of formula &#x3bc;r(&#x3bb;) where &#x3bc;r is the relative magnetic permeability of the metamaterial and &#x3bb; is a wavelength of the incident radiation having a value of between 15 nm and 1100 nm, or a specific code of formula &#x3bb;(&#x3bc;r) or combinations of said codes. Said mark has a first tranverse dimension bx in a first transverse extension of the metamaterial and a second transverse dimension by in a second transverse extension of the metamaterial, different from the first transversal dimension, the first transverse dimension and the second transverse dimension each being at least equal to the wavelength (&#x3bb;) of the incident radiation.

Optical security mark comprising metamaterials with a magnetic response, authentication method using said mark, and use of said mark applied to an object

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Valencia, Spain

Alejandro Jose Martinez Abietar