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US 2005/0030992 A1Published application
Near field optical apparatus
AssigneeResearch Investment Network, Inc.
InventorsRobert Thornton, Xiaolei Shi
Life of this patent
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AssigneeResearch Investment Network, Inc.
InventorsRobert Thornton, Xiaolei Shi
Estimating the term…
A near field optical apparatus comprising a conductive sheet or plane having an aperture therein with the conductive plane including at least one protrusion which extends into the aperture. The location, structure and configuration of the protrusion or protrusions can be controlled to provide desired near field localization of optical power output associated with the aperture. Preferably, the location, structure and configuration of the protrusion are tailored to maximize near field localization at generally the center of the aperture. The aperture preferably has a perimeter dimension which is substantially resonant with the output wavelength of the light source, or is otherwise able to support a standing wave of significant amplitude. The apparatus may be embodied in a vertical cavity surface emitting layer or VCSEL having enhanced nearfield brightness by providing a conductive layer on the laser emission facet, with, a protrusion of the conductive layer extending into an aperture in the emission facet. The aperture in the emission facet preferably has dimensions smaller than the guide mode of the laser, and the aperture preferably defines different regions of reflectivity under the emission facet. The depth of the aperture can be etched to provide a particular target loss, and results in higher optical power extraction from the emission facet.
An apparatus comprising:
An apparatus, comprising:
An apparatus comprising a light source and an emission facet having a conductive surface, the conductive surface having a subwavelength aperture therein, the conductive surface including at least one protrusion extending into the aperture, the protrusion being of sufficient size to produce a transmission mode with high throughput.
An apparatus comprising a light source and a conductive plane having a subwavelength aperture, the aperture including a plurality of spaced apart slots, and at least one connector region joined to each adjacent the spaced apart slot, wherein the slots of the aperture are of sufficient size to produce a transmission mode with high throughput.
An apparatus, comprising:
A semiconductor laser comprising:
Dependencies are inferred from the claim text.