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:
Nov. 19, 2002
Filed:
Dec. 11, 1998
Lewis B. Aronson, Los Altos, CA (US);
Michael R. T. Tan, Menlo Park, CA (US);
Scott W. Corzine, Sunnyvale, CA (US);
Dubravko I. Babic, Sunnyvale, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A light emitting device and photodetector combination having a structure in which the layer of the photodetector that contacts the light emitting device is separated from the light emitting device by a native semiconductor oxide layer that is both insulating and has a refractive index lower than that of the light emitting device and the photodetector. This configuration results in a light emitting device and photodetector structure that minimizes the capture of the spontaneous emission light output from the light emitting device by the photodetector while electrically isolating the light emitting device from the photodetector. The electrical isolation of the light emitting device from the photodetector results in a four terminal device in which the light emitting device and photodetector may be independently biased, and can therefore be operated at a very low bias voltage.