Interdigital Ce Patent Holdings

Interdigital Ce Patent Holdings, Sas

Mitra Damghanian

Valter Drazic

Oksana Shramkova

Laurent Blonde

Artem Boriskin

Bobin Varghese

An optically-transparent device () is disclosed which comprises a main part () of dielectric material having a refractive index n, said device being configured for forming a field intensity distribution in a near zone of said device from electromagnetic waves incidentally illuminating said device, when said device is embedded into a dielectric material having a refractive index nlower than said refractive index n. Said device () further comprises at least one insert () of dielectric material having a refractive index nhigher than said refractive index n, said at least one insert being at least partly inserted into said main part, said refractive index nbeing different from said refractive index n, and wherein Formula (I) with Wbeing a half width of said insert and Formula (II), Formula (III) with Wbeing a half width of said main part and Formula (IV), with λ being the wavelength of the electromagnetic wave propagating in the dielectric material having refractive index n.

Device for near-field focusing and beam forming

A device configured for radiating a focused electromagnetic beam is proposed. Such device comprises: —a first () and a second () part having respectively a second nand third nrefractive index and a first Wand second W; —a first contact area () intended to be between a host medium having a first refractive index nand in which the micro or nanoparticles are intended to be trapped or moved by a focused electromagnetic beam radiated by the device; —a second contact area () between the first part and the second part; and —a third contact area () intended to be between the second part and the host medium. The focused electromagnetic beam results from a combination of at least two beams among a first (NJ), a second (NJ) and a third (NJ) jet beams radiated respectively by the first, second and third contact areas when an incoming electromagnetic wave (IEM) illuminates the device. The device is configured for having a direction of propagation of the focused electromagnetic beam tilted in respect of a direction of propagation of the incoming electromagnetic wave.

Optical manipulation apparatus

A device () is proposed comprising a first part () of a first material having a first refractive index nand a second part () of a second material having a second refractive index nhigher than n. Such device further comprises at least one contact area () in between the first and second parts, radiating an outgoing electromagnetic wave () when the device is illuminated by an incoming electromagnetic wave (). A projection of the at least one contact area along a direction of propagation of the incoming electromagnetic wave has a non-vanishing height lower than 1.2 times a critical height equal to a wavelength in vacuum of the incoming electromagnetic wave divided by the difference between the second refractive index nand the first refractive index n

Device for radiating at least one outgoing electromagnetic wave when illuminated by an incoming electromagnetic wave

The disclosure relates to an optically-transparent device () comprising a main part () of dielectric material having a refractive index n. Such an optically-transparent device is configured for forming a field intensity distribution in a near zone of said device, from electromagnetic waves incidentally illuminating said device, when said device is embedded in a dielectric material having a refractive index nlower than said refractive index n. Said device () further comprises at least one insert () of dielectric material having a refractive index nlower than said refractive index nand different from said refractive index n, said at least one insert being inserted into said main part, and each one of said at least one insert and said main part having respectively an edge of a step formed by a base surface of said at least one insert or said main part and a lateral surface of said at least one insert or said main part, said base surface being defined with respect to an arrival direction of said electromagnetic wave. The disclosure also relates to a system comprising a plurality of above-described optically-transparent devices uniformly distributed within a dielectric host medium, so as to form a far-field device for far-field applications.

Inhomogeneous microlens device for near-field focusing, beam forming, and high-efficiency far-field device implementation

It is proposed an image sensor comprising pixels for acquiring color information from incoming visible light, wherein said image sensor comprising three pixels being partially covered by a color splitter structure for deviating only one color channel of said incoming visible light towards one of said three pixels, and for deviating other colors of said incoming visible light towards the other pixels among said three pixels. The color splitter structure comprises a first (), a second () and a third () parallelepiped structures arranged so that the first and the third parallelepiped structures are side by side and in contact with the second parallelepiped structure, and wherein the first and the third parallelepiped structures have same dimensions, and are made of a same dielectric material, with a refractive index n, and wherein said second parallelepiped structure being smaller in height (H) compared to said first and third parallelepiped structures (H), and wherein said second parallelepip ed structure being made of a dielectric material with a refractive index n L, and wherein the refractive index n H is greater than the refractive index n L.

Image sensor comprising a color splitter with two different refractive indexes, and different height

The present disclosure relates to an image sensor () comprising an array of pixels, wherein a set of pixels of the array comprises pixels with different height levels arranged according to their height level and relative position to an optical axis () of the image sensor, wherein each pixel of the set can take one height level i among N different height levels, N≥2, where i=1 is the smallest height level and i=N is the highest height level. According to the disclosure, for a pixel of the set having a first height level equal to n, 2≥n≥N, and an adjacent pixel of the set having a second height level equal to m, lower than the first height level, in at least one of horizontal, vertical, or diagonal scanning direction, from a point at which the optical axis () intersects the image sensor () to at least one rim of the image sensor, the second height level m is equal to n−1.

Image sensor comprising an array of pixels for reducing the shadowing effect, and corresponding designing method and computer program product

The disclosure relates to an image sensor comprising pixels for acquiring color information from incoming visible light, wherein said image sensor comprising at least two pixels being partially covered by a color splitter structure comprising a first part and a second part, each of said first and second parts being adjacent to a dielectric part, each of said dielectric part having a first refractive index n(said first part having a second refractive index n, and said second part having a third refractive index n, wherein n&#x3c;n&#x3c;n, and wherein according to a cross section, the first part of said color splitter structure has a first width W, a height H and the second part of said color splitter structure has a second width W, and the same height H, and wherein said color splitter structure has a first, a second and a third edges at the interfaces between parts having different refractive indexes, each edge generating beams or nanojets, and wherein said height H is close to a value Formul (I), where &#x398;and &#x398;are tan &#x398;and are respectively radiation angles of a first and a third beams generated by said first and third edges, and wherein one of said at least two pixels records light associated with a first wavelength &#x3bb;-and the other of said at least two pixels records light having a spectrum in which no or few electromagnetic waves having a wavelength equal to &#x3bb;-are present, wherein said first wavelength &#x3bb;-being either high or small in a range of visible light.

Image sensor comprising a color splitter with two different refractive indexes

A diffraction grating includes a plurality of grating unit cells positioned in a periodic array on a substrate surface. In cross-section, a grating unit cell includes a homogeneous dielectric host medium with a first refractive index n, embedding at least a first block of a first dielectric material with a second refractive index n, a side edge of which is in direct contact with at least a second block of a second dielectric material with a third refractive index n. Both the first block and the second block have a trapezoidal cross-section. The plurality of grating unit cells provides a non-symmetrical response for positive first diffraction order and negative first diffraction order based on nanojet hot spot positions, the nanojets being generated at edges between dielectric materials with different refractive indexes.

Diffraction grating comprising double-materials structures

The present disclosure concerns an image sensor comprising a set of pixels, wherein each pixel of the set comprises a first and a second element, the first element comprising a photodiode module unit, and the second element being an element for filtering color and focusing incident light into said first element. The image sensor further comprises at least two consecutive pixels from the set of pixels, for which first elements are put side by side, and wherein the image sensor comprises a gap between second elements of said at least two consecutive pixels.

Image sensor comprising pixels for preventing or reducing the crosstalk effect

A device for shielding a sub-wavelength-scale object from an electromagnetic wave incident on the device. The device includes a layer of dielectric material, a surface of which has a change of level forming a step. The step is in contact with a medium having a refractive index that is lower than a refractive index of the dielectric material. The sub-wavelength-scale object is located within the device in a quiet zone where an electromagnetic field intensity is below a threshold, the quiet zone extending above said surface, in a vicinity of the step, in a direction of incidence of said incident electromagnetic wave.

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Cesson-Sevigne, France

Mitra Damghanian