California Institute of Technology

Hgst Netherlands, B.v.

Seheon Kim

Axel Scherer

Aditya Rajagopal

Andrew Peter Homyk

Barry C Stipe

Takuya Matsumoto

Shen Ren

Chieh-feng Chang

William Dos Santos Fegadolli

Dong Yoon Oh

Jingqing Huang

A system, according to one embodiment, includes a magnetic head having: a near field transducer, an optical waveguide for illumination of the near field transducer, and an anti-reflection block positioned along the optical waveguide farther from a media facing side of the magnetic head than the near field transducer. The anti-reflection block is positioned a distance from the near field transducer to destructively interfere with light reflected away from the near field transducer. Other systems, methods, and computer program products are described in additional embodiments.

Anti-reflection waveguide for heat-assisted magnetic recording

The present disclosure describes a method for optically powering transducers and related transducers with a photovoltaic collector. An optical fiber power delivery method and a free space power delivery method are also provided. A fabrication process for making an optically powered transducer is further described, together with an implantable transducer system based on optical power delivery.

Methods for optically powering transducers and related transducers

A microlaser system includes an optical source, a microlaser, an actuator switch, and a photovoltaic power source. The microlaser, which includes a control element, is optically pumped by at least a portion of light emitted by the optical source. The actuator switch is configured to be activated by a triggering event. Furthermore, the photovoltaic power source is coupled in a series connection with the actuator switch and the control element, the series connection configured to connect the photovoltaic power source to the control element of the microlaser when the actuator switch is activated by the triggering event.

Methods of modulating microlasers at ultralow power levels, and systems thereof

Novel methods and systems for miniaturized lasers are described. A photonic crystal is bonded to a silicon-on-insulator wafer. The photonic crystal includes air-holes and can include a waveguide which couples the laser output to a silicon waveguide.

III-V photonic crystal microlaser bonded on silicon-on-insulator

Embodiments disclosed herein generally relate to a HAMR device for use in a magnetic reading system. The HAMR device has a primary waveguide extending from a media facing surface to a surface opposite the media facing surface. In one embodiment, the HAMR head has a secondary waveguide having a first and second end positioned within the HAMR head. The secondary waveguide is positioned near the primary waveguide, and the first and second ends of the secondary waveguide are non-reflecting. A thermal sensor is coupled to the secondary waveguide, and responds only to optical power fluctuations in the primary waveguide. In another embodiment, the HAMR head has a second thermal sensor rather than a secondary waveguide. The first thermal sensor and the second thermal sensor are coupled together to act as one optical power sensor and are disposed on the primary waveguide.

Waveguide power sensor structures free of optical coherence effects in a HAMR drive

The present disclosure describes an optically powered transducer with a photovoltaic collector. An optical fiber power delivery method and system and a free space power delivery method are also provided. A fabrication process for making an optically powered transducer is further described, together with an implantable transducer system based on optical power delivery.

Systems and methods for optically powering transducers and related transducers

Photonic crystal cavities and related devices and methods are described. The described cavities can be used as lasers, photovoltaic sources, and single photon sources. The cavities can be both optically and electrically pumped. A fabrication process of the cavities is also described.

Photonic crystal cavities and related devices and methods

A method of etching active quantum nanostructures provides the step of laterally etching of an intermediate active quantum nanostructure layer interposed between cladding layers. The lateral etching can be carried out on at least one side of the intermediate active quantum nanostructure layer selectively, with respect to the cladding layers to define at least one lateral recess or spacing in the intermediate active quantum nanostructure layer and respective lateral protrusions of cladding layers protruding with respect to the intermediate active quantum nanostructure layer. This method can be applied to create devices including active quantum nanostructures such as, for example, three-dimensional photonic crystals, a photonic crystal double-slab and a photonic crystal laser.

Growing community of inventors

San Jose, CA, United States of America

Seheon Kim