A localized gap plasmon resonator includes: a pad including: a first plasmonic material to support a surface plasmon; and a first plasmon surface; a nanoelectromechanical (NEM) member disposed opposing the first plasmon surface of the pad and spaced apart from the pad by a plasmon gap, the plasmon gap supporting a plasmon resonance; and a plasmonic nanoprism disposed on the NEM member and including: a second plasmonic material to support a surface plasmon; and a second plasmon surface, such that: the second plasmon surface of the plasmonic nanoprism opposes the first plasmon surface of the pad; and the pad, the plasmonic nanoprism, and the plasmon gap support a localized gap plasmon (LGP) mode.

A plasmonic field-enhanced photodetector is disclosed. The photodetector may generate photocurrent by absorbing surface plasmon polaritons (SPPs) generated by combining surface plasmons (SPs) with photons of a light wave.

A wavelength multiplexing device is disclosed. When light is irradiated on a first longitudinal end region of a metal nano-structure, surface plasmon polaritons are generated in the first longitudinal end region. The surface plasmon polaritons and the light are coupled with each other to form first coupled surface plasmon polaritons, wherein the first coupled surface plasmon polaritons propagate along and on a surface of the metal nano-structure. When the first coupled surface plasmon polaritons reach a two-dimensional material layer, excitons are induced in the two-dimensional material layer, wherein the induced excitons and the first coupled surface plasmon polaritons are coupled with each other to form second coupled surface plasmon polaritons. The second coupled surface plasmon polaritons propagate along and on a surface of the metal nano-structure toward a second longitudinal end thereof.

Methods and systems for plasmonically enhanced bionanoantennas for tagging, tracking, and locating targets of interest at long distances in both day and nighttime conditions. The nanoantennas are used to tag a target of interest and emit a wavelength to impart a unique biometric signature. The nanoantennas are detectable by selectively harvesting and plasmonically enhancing incident light in the visible region, then upconverting that energy through an activated phosphor.

The invention relates to a plasmonic optical security component comprising two layers (2, 4) made of transparent dielectric material and a metal layer (3) arranged between said transparent dielectric material layers in order to form two dielectric-metal interfaces (31, 32). The metal layer is structured to form, on a first coupling region, a first periodic, two-dimensional coupling array (C.sub.1) which is capable of coupling surface plasmon modes, which are supported by said dielectric-metal interfaces, to an incident light ray, the first coupling array having a profile which does not have point symmetry in any of the directions thereof, and, on a second coupling region, a second periodic, two-dimensional coupling array (C.sub.2) which is capable of coupling surface plasmon modes, which are supported by said dielectric-metal interfaces, to an incident light ray, the second coupling array having a profile which does not have point symmetry in any of the directions thereof and is different from that of the first coupling array.

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack composed of at least: (i) a wetting layer; (ii) a metal layer, wherein the metal is selected from silver, gold or copper or mixtures thereof; (iii) a protective layer which is able to avoid oxidation of said metal layer,

characterized in that wetting layer (i) is in direct contact with metal layer (ii), with the proviso that said multilayered antireflective coating does not comprise silicon nitride and wherein (ii) the metal layer has a physical thickness equal to or higher than 6 nm.

Disclosed is a method to modify the electrical conductivity of an organic and/or molecular material including the steps of providing a reflective or photonic structure and of placing the organic and/or molecular material in or on the structure. The method also includes providing a structure (1) which has an electromagnetic mode which is by design, or can be made by way of adjustment or tuning, resonant with a transition in the organic and/or molecular material (2) and controlling, in particular enhancing, the mobility of the charge carriers, and thus the electrical current, in the organic and/or molecular material (2), by way of strongly coupling the material (2) to the local electromagnetic vacuum field and exploiting the formation of extended macroscopic states in the material.

A method for fabricating a nanoantenna array may include forming a resist layer on a substrate, forming a focusing layer having a dielectric microstructure array on the resist layer, diffusing light one-dimensionally in a specific direction by using a linear diffuser, forming an anisotropic pattern on the resist layer by illuminating the light diffused by the linear diffuser on the focusing layer and the resist layer, depositing a material suitable for a plasmonic resonance onto the substrate and the resist layer on which the pattern is formed, and forming a nanoantenna array on the substrate by removing the resist layer and the material deposited on the resist layer. A light diffusing angle by the linear diffuser and a size of the dielectric microstructure are determined based on an aspect ratio of the pattern to be formed.

There are provided a localized surface plasmon resonance sensing chip in which a linewidth of an absorption spectrum originating from localized plasmon resonance is narrow and with which a peak wavelength shift of an optical spectrum accompanying a change in refractive index of a surface can be accurately measured, and a localized surface plasmon resonance sensing system using this sensing chip. A sensing chip 10 includes a base 14 having a flat-plate shape, a plurality of protruding portions 16, and a metal layer 18 covering each front surface of the plurality of protruding portions 16. The protruding portions 16 each have a shape like a semi-oblate spheroid which is one of three-dimensional parts obtained by dividing an oblate spheroid in half along an equatorial plane and are arranged such that a divided surface 16a of the semi-oblate spheroid faces a front surface 14a of the base 14. A sensing system includes the sensing chip 10, a light source irradiating a detection region of the sensing chip 10 with light, and a photodetector detecting the optical spectrum of light emitted from the light source and then reflected in or transmitted through the detection region of the sensing chip 10.

A photothermal converter using a wavelength selective perfect absorber made of a low-loss metal material or dielectric and a heat detection sensor are combined to develop a sensor that efficiently converts light of a specific wavelength into heat and further electrically detects the heat. Here, since the wavelength selective perfect absorber of the present invention has a periodic structure, it has high directivity, and can also be used as a small motion sensor or a watching sensor using detection of thermal radiation. In addition, it can also be used as a high-precision small position sensor by being combined with a laser light source matching the resonance wavelength of the sensor.