Abstract: A HAMR head includes an anti-reflecting (AR) coating on a side opposite (e.g., a flex side) of the air bearing surface (ABS). The anti-reflective coating may include one or more anti-reflective layers. The anti-reflective coating reduces the amount of light reflected back towards a light source unit. A shading layer may be disposed on the anti-reflective coating and may function as a contact electrode as well as reducing stray light escaping from the laser, thus reducing the amount of stray light reaching the ABS.

Abstract: One embodiment generally relates to a magnetic recording head. The magnetic recording head has a body having an upper surface and a media bearing surface, a spot size converter disposed in the body and extending from the upper surface to the media bearing surface. The spot size converter has a core, comprising a first portion having a rectangular wall extending below the upper surface; and a second portion having a trapezoidal wall extending below the first portion. The magnetic recording head additionally has a first cladding adjacent to the spot size converter in an in-surface direction of the spot size converter, wherein the first cladding has a first refractive index lower than a refractive index of the spot size converter.

Abstract: One embodiment generally relates to a magnetic recording head. The magnetic recording head has a body having an upper surface and a media bearing surface, a spot size converter disposed in the body and extending from the upper surface to the media bearing surface. The spot size converter has a core, comprising a first portion having a rectangular wall extending below the upper surface; and a second portion having a trapezoidal wall extending below the first portion. The magnetic recording head additionally has a first cladding adjacent to the spot size converter in an in-surface direction of the spot size converter, wherein the first cladding has a first refractive index lower than a refractive index of the spot size converter.

Abstract: Embodiments of the present invention generally relate to a HAMR head. The HAMR head includes an anti-reflecting (AR) coating on a side opposite (e.g., a flex side) of the air bearing surface (ABS). The anti-reflective coating may include one or more anti-reflective layers. The anti-reflective coating reduces the amount of light reflected back towards a light source unit. A shading layer may be disposed on the anti-reflective coating and may function as a contact electrode as well as reducing stray light escaping from the laser, thus reducing the amount of stray light reaching the ABS.

Abstract: Embodiments of the present invention generally relate to a HAMR head. The HAMR head includes an anti-reflecting (AR) coating on a side opposite (e.g., a flex side) of the air bearing surface (ABS). The anti-reflective coating may include one or more anti-reflective layers. The anti-reflective coating reduces the amount of light reflected back towards a light source unit. A shading layer may be disposed on the anti-reflective coating and may function as a contact electrode as well as reducing stray light escaping from the laser, thus reducing the amount of stray light reaching the ABS.

Abstract: Embodiments of the present invention generally relate to a HAMR head. The HAMR head includes an anti-reflecting (AR) coating on a side opposite (e.g., a flex side) of the air bearing surface (ABS). The anti-reflective coating may include one or more anti-reflective layers. The anti-reflective coating reduces the amount of light reflected back towards a light source unit. A shading layer may be disposed on the anti-reflective coating and may function as a contact electrode as well as reducing stray light escaping from the laser, thus reducing the amount of stray light reaching the ABS.

Abstract: Provided is a thermal-assisted-magnetic-recording head capable of irradiating a magnetic recording medium with light with a spot size reduced on the submicron order with high utilization efficiency. A spot size converter 13 for guiding light emitted from an optical source 4 into a magnetic head is provided at a position adjacent to a magnetic main pole 19 in the magnetic head. In the spot size converter 13, a cover layer 15 having a lower refractive index than those of a core 14 and a clad material 24 is formed between the core 14 and the clad 15 and has a shape composed of a shape substantially rectangular in a light traveling direction and a taper shape having a width increasing toward the bottom surface of the magnetic head.

Abstract: The present invention provides an optical waveguide element evaluation apparatus in which stray light is separated and the distribution of light angles of an optical waveguide element can be evaluated. An optical waveguide element evaluation apparatus includes optical path setting devices that image a near-field pattern at an end face of emission light from an optical waveguide element in the air; a pinhole plate that includes opening portions which the imaged near-field pattern penetrates; and a detection unit that detects the spread angle of the light at the end face of the emission light using a far-field pattern formed of the light penetrating the pinhole plate.

Abstract: In one embodiment, a magnetic recording head includes a spot size converter having a tapered portion, the tapered portion having at least one of a width and thickness that increases in a direction towards an air bearing surface; a waveguide surrounding the spot size converter, the waveguide having a refractive index that is lower than a refractive index of the spot size converter; and cladding adjacent the waveguide, the cladding having a refractive index that is lower than the refractive index of the waveguide. Additional systems and heads are also disclosed.

Abstract: Provided is a thermal-assisted-magnetic-recording head capable of directing, to a magnetic recording medium, light in which the spot size is reduced to submicron order with high total optical propagation efficiency. A light coupling unit that guides light emitted from the light source into a magnetic head and a high-refractive-index core that couples with the light guided by the light coupling unit to lead the light to an air bearing surface are arranged in the magnetic head. The light coupling unit includes a plurality of thin-film-like cores that are separated from each other by a clad material. An upper part of the high-refractive-index core is placed between two thin-film-like cores.

Abstract: A thermally assisted recording magnetic head is provided in which a magnetic recording medium can be irradiated with light having a spot size reduced in the submicron order with high total optical propagation efficiency. In a magnetic head, a spot size converter that propagates the light from an optical source in the magnetic head is provided adjacent to a main pole. The spot size converter includes a cover layer having a refractive index lower than that of a clad material and formed in contact with the optical waveguide core, and is formed in a shape composed of a substantially rectangular shape in a light traveling direction and a tapered shape where the width is increased toward the bottom surface of the magnetic head. The optical waveguide core having the cover layer formed is vertically interposed between multi-mode-thin-film-like cores that can excite a first or higher-order optical waveguide mode.

Abstract: A thermally assisted recording magnetic head is provided in which a magnetic recording medium can be irradiated with light having a spot size reduced in the submicron order with high total optical propagation efficiency. In a magnetic head, a spot size converter that propagates the light from an optical source in the magnetic head is provided adjacent to a main pole. The spot size converter includes a cover layer having a refractive index lower than that of a clad material and formed in contact with the optical waveguide core, and is formed in a shape composed of a substantially rectangular shape in a light traveling direction and a tapered shape where the width is increased toward the bottom surface of the magnetic head. The optical waveguide core having the cover layer formed is vertically interposed between multi-mode-thin-film-like cores that can excite a first or higher-order optical waveguide mode.

Abstract: Provided is a thermal-assisted-magnetic-recording head capable of irradiating a magnetic recording medium with light with a spot size reduced on the submicron order with high utilization efficiency. A spot size converter 13 for guiding light emitted from an optical source 4 into a magnetic head is provided at a position adjacent to a magnetic main pole 19 in the magnetic head. In the spot size converter 13, a cover layer 15 having a lower refractive index than those of a core 14 and a clad material 24 is formed between the core 14 and the clad 15 and has a shape composed of a shape substantially rectangular in a light traveling direction and a taper shape having a width increasing toward the bottom surface of the magnetic head.

Abstract: Provided is a thermal-assisted-magnetic-recording head capable of directing, to a magnetic recording medium, light in which the spot size is reduced to submicron order with high total optical propagation efficiency. A light coupling unit that guides light emitted from the light source into a magnetic head and a high-refractive-index core that couples with the light guided by the light coupling unit to lead the light to an air bearing surface are arranged in the magnetic head. The light coupling unit includes a plurality of thin-film-like cores that are separated from each other by a clad material. An upper part of the high-refractive-index core is placed between two thin-film-like cores.

Abstract: The present invention aims to provide a chip applied to a molecular sensing device which carries out Raman spectroscopic analysis utilizing Raman scattering enhancement due to plasmons, and that achieves higher sensitivity and stability of its sensing sensitivity and miniaturization, and to provide a molecular sensing device including the chip. As the chip for Raman scattering enhancement applied to the molecular sensing device using the Raman spectroscopic analysis, which has an excitation light source for Raman scattering, a chip for Raman scattering enhancement and a photodetector for observing the Raman scattering, the present invention employs a chip having a molecular detecting element in which a transparent protection material thin film 32 composed of a dielectric material thin film or semiconducting material thin film is formed on a thin film 31 containing the noble metal oxide, and utilizes the Raman scattering enhancement by the thin film containing the noble metal oxide.

Abstract: The present invention aims to provide a chip applied to a molecular sensing device which carries out Raman spectroscopic analysis utilizing Raman scattering enhancement due to plasmons, and that achieves higher sensitivity and stability of its sensing sensitivity and miniaturization, and to provide a molecular sensing device including the chip. As the chip for Raman scattering enhancement applied to the molecular sensing device using the Raman spectroscopic analysis, which has an excitation light source for Raman scattering, a chip for Raman scattering enhancement and a photodetector for observing the Raman scattering, the present invention employs a chip having a molecular detecting element in which a transparent protection material thin film 32 composed of a dielectric material thin film or semiconducting material thin film is formed on a thin film 31 containing the noble metal oxide, and utilizes the Raman scattering enhancement by the thin film containing the noble metal oxide.