The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2006
Filed:
Jul. 13, 2004
Mutsuo Ogura, Tsukuba, JP;
Yasushi Nagamune, Tsukuba, JP;
Takeyoshi Sugaya, Tsukuba, JP;
Abstract
Quantum wire is formed on the bottom of a V-shaped groove in a V-grooved substrate as a channel between source and drain electrodes or as at least part of the channel. A photocarrier accumulation region is provided within the quantum wire or at a position connected to or adjacent to the quantum wire for accumulating charges generated when light shines onto a photosensitive region that comprises at least a clad layer that covers the quantum wire. A recess is provided in the upper clad layer to localize the photocarrier accumulation region. As a result, it is possible to provide a photodetector that exhibits high sensitivity, high speed and low power consumption in an expanded wavelength region. It is also possible to provide a photodetector capable of constructing core portions thereof by one-time selective growth.