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Class 369/13.33 - Near field optic


Subclass of Class 369 - Dynamic information storage or retrieval
Definition: Subject matter wherein the light beam transducer is placed
No. of patents: 176
Last issue date: 05/22/2012


1          
NumberTitleIssue Date
8184507Slider with integrated thermally-assisted recording (TAR) head and long laser diode with optical body for directing laser radiation
A thermally-assisted recording (TAR) slider has an integrated TAR head and an integrated long laser diode, like an external-cavity VCSEL. The TAR head is integrated with the slider at the trailing end and includes an optical waveguide having a grating coupler orient...
05/22/2012
8184506Near-field optical head with inclined magnetic poles and information recording/reproducing device
A near-field optical head has a slider with first and second inclined surfaces that confront a magnetic recording medium during recording and reproduction of information. A recording element is formed on one of the first and second inclined surfaces and includes mai...
05/22/2012
8179745Head gimbal assembly and disk drive
A head gimbal assembly including a gimbal provided with a tongue comprising a stage; a sub-mount comprising a laser diode, wherein the laser diode is disposed internally in the sub-mount, and wherein the sub-mount is mounted on said stage; a head slider for thermall...
05/15/2012
8179747Thermally assisted magnetic head
A thermally assisted magnetic head includes a slider and a light source unit. The light source unit includes a semiconductor laser diode. The semiconductor laser diode includes an n-type (Alx1Ga(1-x1))0.51In0.49P cladding ...
05/15/2012
8179746Near-field optical recording apparatus, method and medium
An apparatus, a method and a recording medium for optical near-field recording are proposed. The apparatus includes a light source for generating a reading light beam, which is illuminated onto a near-field optical recording medium. The apparatus further includes a ...
05/15/2012
8174937Thin-film magnetic head having microwave magnetic exciting function and magnetic recording and reproducing apparatus
A thin-film magnetic head having microwave magnetic exciting function includes a write magnetic field production means for producing, in response to a write signal, a write magnetic field to be applied into a magnetic recording medium, and at least line conductor of...
05/08/2012
8169861Thermally-assisted magnetic recording head comprising plasmon generator
Provided is a thermally-assisted magnetic recording head in which NF-light with sufficiently high light density can be applied to a medium while a write-field generating point and a near-field light (NF-light) generating point are close to each other. The head compr...
05/01/2012
8164988All-optical magnetic recording system using circularly polarized light and bit-patterned media
A perpendicular magnetic recording system uses bit-patterned media (BPM) and circularly polarized light to switch the magnetization of the discrete magnetic bits by the inverse Faraday effect. Circularly polarized light generates an external rotating electric field ...
04/24/2012
8149653Light source unit for thermally-assisted magnetic recording capable of monitoring of light output
Provided is a light source unit that is to be joined to a slider to form a thermally-assisted magnetic recording head. The light source unit comprises: a unit substrate having a source-installation surface; a light source provided in the source-installation surface ...
04/03/2012
8149654Wave guide that attenuates evanescent light of higher order TM mode
A waveguide has a core through which laser light can propagate in a TM mode, that has a rectangular cross section perpendicular to a propagative direction of the laser light, and through which the laser light can propagate in a fundamental mode in which only one por...
04/03/2012
8139448Slider with integrated thermally-assisted recording (TAR) head and vertical-cavity surface-emitting laser (VCSEL) with angled external cavity
A thermally-assisted recording (TAR) slider has an integrated TAR head and an integrated external-cavity VCSEL. The TAR head is integrated with the slider at the trailing end and includes an optical waveguide having a grating coupler oriented in a plane generally pa...
03/20/2012
8139447Heat-assisted magnetic recording head with near-field light generating element
A heat-assisted magnetic recording head includes a magnetic pole, a waveguide, a near-field light generating element, and a substrate on which they are stacked. The near-field light generating element and the waveguide are disposed farther from the top surface of th...
03/20/2012
8130599Thermally-assisted magnetic recording head comprising near-field optical device with propagation edge
There is provided a near-field-light (NFL) generating optical system in which the point where near-field (NF) light is generated can be provided sufficiently close to the end surface of a magnetic pole that generates write field. The optical system comprises: a wave...
03/06/2012
8130598Head for thermal assisted magnetic recording device, and thermal assisted magnetic recording device
The aim of the present invention is to apply an intense magnetic field to a portion where an optical near-field is generated by a thermal assisted magnetic recording head with a scatterer having conductivity as an optical near-field generating element. To this end, ...
03/06/2012
8125858Heat-assisted magnetic recording head including plasmon generator
A plasmon generator has an outer surface including a plasmon exciting part, and has a near-field light generating part located in a medium facing surface. The plasmon exciting part faces an evanescent light generating surface of a waveguide's core with a predetermin...
02/28/2012
8125857Heat-assisted magnetic recording head including plasmon generator
A plasmon generator has an outer surface including a propagation edge, and has a near-field light generating part lying at an end of the propagation edge and located in a medium facing surface. The propagation edge faces an evanescent light generating surface of a w...
02/28/2012
8116175Heat-assisted magnetic recording head including plasmon generator
A plasmon generator has a near-field light generating part located in a medium facing surface. The plasmon generator has an outer surface including a plasmon exciting surface and a plasmon propagating surface that face toward opposite directions. The plasmon excitin...
02/14/2012
8116174Near field light generating device, optically assisted magnetic recording head, optically assisted magnetic recording device, near field optical microscope and near field light exposure apparatus
Disclosed is a near field light generating device comprising a first medium layer which transmits light from a light source. This near field light generating device generates near field light by using light irradiating a plasmon probe through the first medium. This ...
02/14/2012
8116173Heat-assisted magnetic recording head with laser diode
A heat-assisted magnetic recording head includes a slider, and an edge-emitting laser diode fixed to the slider. The slider has a waveguide and an overcoat layer that covers the waveguide. The laser diode has an emitting end face including an emission part for emitt...
02/14/2012
8116172Near-field light generating device including surface plasmon generating element
A near-field light generating device includes: a base having a top surface; a waveguide that allows laser light to propagate therethrough and is disposed above the top surface of the base; and a surface plasmon generating element that is disposed above the top surfa...
02/14/2012
8116176Thermally assisted magnetic head-slider and head-gimbal assembly
A thermally assisted magnetic head-slider includes an air-bearing slider, a metal film, and a semiconductor laser unit. The metal film having an aperture in a part through which light from the semiconductor laser unit passes is disposed between a surface opposite to...
02/14/2012
8111591Heat-assisted magnetic recording head having laser diode overlaping two recording wiring layers
A heat-assisted magnetic recording head includes a slider, and an edge-emitting laser diode fixed to the slider. The slider includes: a substrate; and an MR element, two reproduction wiring layers, a coil, two recording wiring layers, a magnetic pole, a near-field l...
02/07/2012
8107325Near-field light generating element comprising surface plasmon antenna with surface or edge opposed to waveguide
Provided is a near-field light generating element in which reduced is the propagation loss of excited surface plasmon that propagates to the near-field light generating end. The element comprises: a waveguide through which light for exciting surface plasmon propagat...
01/31/2012
8107326Slider with integrated thermally-assisted recording (TAR) head and integrated long laser diode
A thermally-assisted recording (TAR) slider has an integrated TAR head and an integrated laser diode. The laser diode may be an external-cavity VCSEL that includes a semiconductor substrate with the VCSEL formed on one surface, an external cavity on the opposite sur...
01/31/2012
8102736Near-field light generator comprising waveguide with inclined end surface
Provided is a near-field light generator capable of avoiding a noise to the generated near-field light. The generator comprises a waveguide and a plasmon antenna comprising a propagation surface or edge, for propagating surface plasmon, extending to a near-field lig...
01/24/2012
8098547Optical waveguide and thermal assist magnetic recording head therewith
An optical waveguide, on account of its ability to apply phase resonance of a wavelength and of a first and second triangular plate-like spot size converter members formed of the same material as a core material and being arranged and formed in a substantially symme...
01/17/2012
8094523Heat-assisted magnetic recording medium and magnetic recording apparatus with the medium
Provided is a magnetic recording medium that generates near-field light within itself and enables favorable heat-assisted magnetic recording with this near-field light. The medium comprises: a magnetic recording layer; and an optically changeable layer formed on the...
01/10/2012
8089831Heat-assisted magnetic recording head including plasmon generator
A plasmon generator has an outer surface including a surface plasmon exciting surface, and has a near-field light generating part located in a medium facing surface. The surface plasmon exciting surface is a flat surface that faces an evanescent light generating sur...
01/03/2012
8089830Near-field light generating device including near-field light generating element with edge part opposed to waveguide
A near-field light generating device includes: a waveguide having a groove that opens in the top surface; a clad layer disposed on the top surface of the waveguide and having an opening that is contiguous to the groove; a near-field light generating element accommod...
01/03/2012
8077558Thermally-assisted magnetic recording head including plasmon generator
A plasmon generator has an outer surface including a plasmon exciting part that faces an evanescent light generating surface of a waveguide. The outer surface further includes first and second inclined surfaces that increase in distance from each other with increasi...
12/13/2011
8077559Thermally-assisted magnetic recording head including plasmon generator
An outer surface of a plasmon generator includes: a plasmon exciting part that faces an evanescent light generating surface with a predetermined distance therebetween; and a front end face located in a medium facing surface. The plasmon generator has: first and seco...
12/13/2011
8072847Optical device, optically heat assisted magnetic recording head and optically heat assisted magnetic recording apparatus, having intensity point deviated from axis of the core
Provided are an optical device, optically assisted magnetic recording head and optically assisted magnetic recording apparatus that effectively emit the introduced light, from the apex portion of a waveguide. The optical device includes: an optical element having a ...
12/06/2011
8064297Electromagnetic field generating element, information recording and reproduction head, and information recording and reproduction device
An electromagnetic field generating element includes a conductor that generates near-field light when irradiated with light and generates a magnetic field when a current flows through the conductor. The electromagnetic field generating element further includes a sof...
11/22/2011
8059496Magnetic core plasmon antenna with recessed plasmon layer
Various embodiments of a TAMR head having a magnetic core antenna (MCA) with a recessed plasmon layer are disclosed. An end of the plasmon layer is separated from the ABS by a magnetic layer that transmits the plasmon mode from the plasmon layer and transmits magnet...
11/15/2011
8059495Head gimbal assembly and information recording and reproducing apparatus
There are provided a head gimbal assembly and an information recording and reproducing apparatus capable of easily positioning a light guiding portion and a slider on a tongue portion and performing a stable recording and reproducing operation. A head gimbal assembl...
11/15/2011
8054714Near field light assisted magnetic recording head and recording apparatus using the same
A head using near field light is formed, which is characterized by including a near field light assisted magnetic recording head characterized by including a pyramid tip 43 configured to generate near field light at the tip end thereof, in which magnetic reco...
11/08/2011
8050150Near-field light detection element and information reproducing medium reproducing method
A near-field light detection element is provided with a light source, a conductive scatterer for generating near-field light by being irradiated with light from the light source, and a photoelectric conversion element arranged in a near-field light generation region...
11/01/2011
8045422Near-field light generating element comprising surface plasmon antenna and waveguide with groove
Provided is a near-field light generating element in which as much amount as possible of waveguide light can be coupled with a plasmon antenna. The element comprises a light waveguide and a plasmon antenna comprising a surface or edge for propagating surface plasmon...
10/25/2011
8040761Near-field light generating device including near-field light generating element disposed over waveguide with buffer layer and adhesion layer therebetween
A near-field light generating device includes: a waveguide; a buffer layer disposed on the top surface of the waveguide; an adhesion layer that is formed by incompletely oxidizing a metal layer and disposed on the buffer layer; and a near-field light generating elem...
10/18/2011
8023366Near-field optical head and information recording apparatus
The invention is a near-field optical head that generates near-field light to heat a predetermined area of a medium and applies a magnetic field to the predetermined area to record information, the head including an optical waveguide 103 having a path for pro...
09/20/2011
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