22 results about "Plasmonic waveguide" patented technology

The present embodiments relate to a near-field transducer (NFT) for a hard disk drive write head with a parabolic waveguide blocker. The waveguide blocker can include a parabolic curved surface in a center portion of a first side of the waveguide blocker and a first side comprising a slope angle of between 10-90 degrees. The waveguide blocker can be configured to reduce electromagnetic radiation from the waveguide core and recycle a scattering field emitting from the NFT to mitigate a thermal background in a recording medium and improve a thermal gradient to increase an area density capacity (ADC) of the hard disk drive write head.

To improve a thermal gradient of a near-field transducer (NFT) and increase an areal density capacity of a HAMR head.SOLUTION: An NFT includes a main pole (MP) 302, a two-layer transducer 304 positioned adjacent to the MP, a waveguide core 306, and a parabolic waveguide blocker 308 positioned adjacent to the waveguide core, wherein the parabolic waveguide blocker includes a parabolic shape having a surface exposed to an air-bearing surface (ABS) of a write head. The parabolic waveguide blocker reduces electromagnetic radiation from the waveguide core, recycles a scattering field emitted from the NFT to mitigate a thermal background in a recording medium, improves a thermal gradient, and increases an areal density capacity (ADC) of a hard disk drive write head.SELECTED DRAWING: Figure 3A

The present embodiments relate to a noble metal coating on a parabolic waveguide blocker surface to future improve thermal gradient for HAMR head which can provide an improved thermal spot confinement over other designs. More particularly, the present embodiments relate to a component in the near field transducer (NFT), made of a metallic parabolic shaped waveguide blocker (PWB) with noble metal coating on the PWB surface. The designs as described herein can include a noble metal coating (e.g., Au, Rh, Ir, Pt, Aluminum (Al), etc.) which can enable a plasmonic effect on the PWB surface for HAMR thermal gradient improvement.

The application discloses a hybrid plasmonic optical waveguide, which comprises an oxidation protection layer and an alkali metal layer, wherein the oxidation protection layer and the alkali metal layer do not react under normal temperature conditions, and the alkali metal layer is sodium or potassium. The application can further improve the mode field confinement capability of the hybrid plasmonic waveguide, realize low-loss plasmonic mode transmission, and has important application value in the field of subwavelength photonic integration in a communication waveband.

The present embodiments relate to a noble metal coating on a parabolic waveguide blocker surface to future improve thermal gradient for HAMR head which can provide an improved thermal spot confinement over other designs. More particularly, the present embodiments relate to a component in the near field transducer (NFT), made of a metallic parabolic shaped waveguide blocker (PWB) with noble metal coating on the PWB surface. The designs as described herein can include a noble metal coating (e.g., Au, Rh, Ir, Pt, Aluminum (Al), etc.) which can enable a plasmonic effect on the PWB surface for HAMR thermal gradient improvement.

A photonic gate system comprising a center waveguide that is provided with a continuous wave input; a first electrically controlled plasmonic waveguide configured on a first opposing side that is adjacent to the center waveguide; a second electrically controlled plasmonic waveguide configured on a second opposing side that is adjacent to the center waveguide; a first outer waveguide configured adjacent to the first electrically controlled plasmonic waveguide; and a second outer waveguide configured adjacent to the second electrically controlled plasmonic waveguide.

The application provides a hybrid plasmonic waveguide Bragg grating polarization filter, wherein the Bragg grating is formed by alternately arranging two high-refractive layers with different sidewall profile modulations in a hybrid plasmonic waveguide, and the modulated sidewall profiles are parabolic and linear respectively; the alternately arranged hybrid plasmonic waveguide structure comprises a SiO2 substrate, a high-refractive medium layer Si with a sidewall profile modulation, a support layer ZnO and a metal layer Ag; the high-refractive material Si with a width Wsi is placed in the middle of the SiO2 substrate, the support layer ZnO is symmetrically placed on both sides of the SiO2 substrate, and the metal layer Ag is supported by the support layer, and a transition support layer Si3N4 is filled between the support layer and the metal layer; the application has a compact structure, and can realize the transmission spectrum optimization of a low-frequency passband and a forbidden band while maintaining good filtering characteristics.

Disclosed is a plasmonic device (10), comprising: a substrate (11); and a dielectric layer (13) arranged between a base metal layer (12) and a structured metal layer (14) which form with respect to the substrate (11) a vertical stack of layers, wherein the structured metal layer (14) includes arranged in a horizontal direction an input structure (141) for enabling an input section (21), a waveguide structure (142) for enabling a plasmonic waveguide (22), and an output structure (143) for enabling an output section (23), wherein the input section (21) is configured to receive an optical input signal (31) and transmit input power (41) to the plasmonic waveguide (22), wherein the plasmonic waveguide (22) is configured to receive input power (41) from the input section (21) and transmit output power (43) to the output section (23), and wherein the output section (23) is configured to receive output power (43) from the plasmonic waveguide (22) and transmit an optical output signal (33).

The invention discloses a terahertz three-dimensional link interconnection-oriented bistable adjustable pseudo surface plasmon waveguide and a preparation method thereof, and belongs to the technical field of terahertz on-chip communication, the waveguide comprises a feed structure, an actuator, a patterned metal patch, a flexible dielectric substrate and a fiber-reinforced active layer, wherein the fiber-reinforced active layer is provided with a positive thermal response area and a negative thermal response area, S-shaped bending can be generated under photo-thermal excitation, and dynamic switchable interconnection between chips with different heights in a three-dimensional space is achieved. The working frequency band of the waveguide is 31.56-127.71 GHz, the relative bandwidth reaches 120%, the insertion loss is lower than 1.5 dB, and the waveguide has the characteristics of low loss, ultra wide band and bistable holding. The preparation method comprises the steps of waveguide main body structure processing, fiber reinforced active layer compounding, actuator integration and overall assembly. The method solves the problems that the existing terahertz interconnection dimension is limited and the resource allocation is fixed, and is suitable for a high-density three-dimensional integrated and dynamic reconfigurable system on chip.

The invention discloses a laser coherent combination method and system based on a plasma self-imaging waveguide, relates to the technical field of laser coherent combination, and can improve the coherent combination effect and realize the technical breakthrough of coherent combination. The system comprises a synthesis laser seed module, a laser beam splitting amplification module, a laser plasma waveguide coupling module, a plasma capillary air chamber module, a plasma control module, a plasma waveguide self-imaging synthesis module and a plasma waveguide self-imaging length feedback control module. By adopting the system, the specific structure of the plasma waveguide and the specific distribution of the high-energy laser regulation and control plasma can be utilized to efficiently guide multiple beams of high-energy laser, so that a breakthrough coherent combination effect is realized. The invention also discloses a method for performing coherent combination by using the system.

A method and computer program product for fabricating a quantum sensor, and a quantum sensor. The quantum sensor may be fabricated, wherein the quantum sensor includes a piezoelectric substrate. The quantum sensor may further include a plasmonic waveguide above the piezoelectric substrate. The quantum sensor may further include a 2D-material layer above the plasmonic waveguide. The quantum sensor may further include one or more electrical contacts below the piezoelectric substrate.

The embodiment of the application provides a kind of dielectric constant measuring device and method, it is applicable to terahertz technical field.The method comprises: by the dielectric sensor structure based on the artificial plasmonic waveguide after structure improvement, the dielectric constant of dielectric material is measured in terahertz frequency band, specifically, by changing the metal layer geometric parameter of waveguide specific part, the function of waveguide is changed from transmission to sensing, then according to the sample of different dielectric constant, the resonance peak center frequency of the dielectric sensor is shifted, and the dielectric constant of the sample to be measured is calculated by the shift amount of resonance peak center frequency.The device for executing the method includes artificial plasmonic waveguide based on it, with the advantages of simple structure, easy processing, good sensitivity and the like.The dielectric constant measurement method can simply and quickly determine the dielectric constant of trace small sample.

An electro-optical modulator for an integrated photonic circuit, including: a substrate having a thin film of lithium niobate disposed on an electrically insulating material; first and second optical waveguides disposed on the thin film of lithium niobate, the optical waveguides being mutually spaced and composed of silicon nitride; and a pair of plasmonic electrodes disposed on the thin film of lithium niobate and configured to define a plasmonic waveguide in a nanoscale gap there between; wherein the plasmonic waveguide is configured to communicatively interconnect the optical waveguides by photon-plasmon coupling so that a modulation voltage applied across the pair of plasmonic electrodes modulates a phase of an optical signal passing from either of the optical waveguides to the other of the optical waveguides via the plasmonic waveguide.

The present invention is directed to a removable sample holder for analytical instruments or apparatuses that utilizes a prism. For example, sample devices of the invention can be used in a surface plasmon resonance (SPR) spectroscopy, a plasmon-waveguided resonance (PWR) spectroscopic device, as well as other spectroscopy devices known to one skilled in the art that uses a prism. The present invention is also directed to methods for using the same. The sample holder device (10) includes a sample injection port (100), a prism retainer (200) and a sample compartment base (300). Unlike conventional SPR and PWR instruments that have a built-in sample chamber, the sample holder device (10) of the present invention provides a separate sample chamber that can be readily removed and replaced. Furthermore, by allowing ready replacement of the prism the sample holder device (10) of the invention allows user to fabricate custom sensor chips.

The application discloses an on-chip integrated plasmonic photodetector and a preparation method and application thereof, and belongs to the technical field of optical elements.The photodetector comprises a semiconductor structure, an electrode and a plasmonic waveguide; the semiconductor structure comprises silicon, silicon dioxide and a semiconductor photoelectric material from bottom to top, is obtained by etching part of the top silicon of silicon-on-insulator or is obtained by depositing or transferring the required semiconductor photoelectric material after etching the top silicon of silicon-on-insulator completely; the electrode is arranged at two ends of the semiconductor photoelectric material and is in contact with the semiconductor photoelectric material; and the plasmonic waveguide is arranged at the side of the semiconductor photoelectric material, and a gap exists between the end of the plasmonic waveguide and the semiconductor photoelectric material.The application realizes efficient near-field coupling between the plasmonic waveguide and the silicon nanostructure by optimizing the structure parameters, and finally realizes on-chip integrated direct detection of the electrical signal of the plasmon, and has good controllability in processing and preparation.

Structures for a photonic chip that include a waveguide and methods of forming such structures. The structure comprises a first waveguide core, a second waveguide core adjacent to the first waveguide core, and a first layer between the first waveguide core and the second waveguide core. The structure further comprises a second layer adjacent to the first waveguide core, and a third layer adjacent to the second waveguide core. The first layer comprises an electro-optic material, and the second and third layers comprise a metal.

To provide improved thermal spot confinement in a heat assisted magnetic recording (HAMR) write head.SOLUTION: The HAMR write head 400 comprises a main pole 402, a wave guide core 410, bi-layer transducers disposed between the main pole 402 and the wave guide core 410, a dielectric spacer layer disposed adjacent to the wave guide core 410, parabolic wave guide blockers (PWBs) 416, and a noble metal layer 414 disposed between the PWB416 and the dielectric spacer layer, wherein the noble metal layer 414 is 20-100 nanometers thick and comprises any of ruthenium (Ru), iridium (Ir), platinum (Pt), gold (Au) and alloys thereof.SELECTED DRAWING: Figure 4

The present embodiments relate to a near-field transducer (NFT) for a hard disk drive write head with a parabolic waveguide blocker. The waveguide blocker can include a parabolic curved surface in a center portion of a first side of the waveguide blocker and a first side comprising a slope angle of between 10-90 degrees. The waveguide blocker can be configured to reduce electromagnetic radiation from the waveguide core and recycle a scattering field emitting from the NFT to mitigate a thermal background in a recording medium and improve a thermal gradient to increase an area density capacity (ADC) of the hard disk drive write head.

The application discloses a thin film lithium niobate electro-optic modulator and a preparation method thereof. The modulator comprises, from bottom to top, a substrate layer, a first high refractive index layer, a low refractive index layer, a metal electrode layer and a second high refractive index layer. The low refractive index layer is a thin film lithium niobate layer. The widths of the substrate layer, the first high refractive index layer and the low refractive index layer are equal. Light forms a hybrid plasmonic waveguide mode in the metal electrode layer and all the layers below the metal electrode layer. The light field is localized in the low refractive index layer, and the nonlinear interaction is enhanced. The widths of the metal electrode layer and the second high refractive index layer are equal and smaller than that of the substrate layer. Light forms a conventional plasmonic mode in the metal electrode layer and the second high refractive index layer. The light field is distributed between the interface of the metal electrode layer and the second high refractive index layer. The light field in the two modes interferes out of phase to form a coupling hybrid plasmonic mode, which concentrates the light field in the low refractive index layer, reduces the proportion of the light field in the metal electrode layer and further reduces the propagation loss.

The present embodiments relate to a near-field transducer (NFT) for a hard disk drive write head with a parabolic waveguide blocker. The waveguide blocker can include a parabolic curved surface in a center portion of a first side of the waveguide blocker and a first side comprising a slope angle of between 10-90 degrees. The waveguide blocker can be configured to reduce electromagnetic radiation from the waveguide core and recycle a scattering field emitting from the NFT to mitigate a thermal background in a recording medium and improve a thermal gradient to increase an area density capacity (ADC) of the hard disk drive write head.

The invention belongs to the field of optical communication, and provides a mixed plasma TE pass-type polarizer and a design method thereof. The hybrid plasma waveguide is composed of a linear hybrid plasma waveguide and a bent hybrid plasma waveguide, and the research shows that the introduction of the linear hybrid plasma waveguide reduces the additional loss of TE polarized light and improves the polarization extinction ratio. And secondly, by designing a hybrid plasma waveguide formed by a sandwich structure including a semiconductor layer, a dielectric layer and a metal layer, the TM polarized light is converted into surface plasma light, and the surface plasma light is mainly distributed in the middle dielectric layer for transmission, so that the additional loss caused by metal heating is reduced.

The invention relates to a plasmonic device and a method for fabricating a plasmonic device. The plasmonic device comprises a substrate on which is arranged a plasmonic section which includes at least one inorganic confining structure adjacent to an organic optical material for providing a plasmonic waveguide. The organic optical material originates from one or more processes for arranging the organic optical material in a limited area. A protective layer is deposited for covering and / or enclosing the organic optical material for improved reliability of the plasmonic waveguide.