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:
May. 06, 2025
Filed:
Oct. 28, 2022
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Abstract
Provided is a high-performance infrared optical device including a reflecting layer structure that can be widely used in the mid-infrared region. An infrared optical device that has a light emission/reception property of having a peak at a center wavelength λ comprises: a semiconductor substrate; and a thin film laminate portion including a first reflecting layer formed on the semiconductor substrate, a lower semiconductor layer of a first conductivity type, a light emitting/receiving layer, an upper semiconductor layer of a second conductivity type, and a second reflecting layer in the stated order, wherein the first reflecting layer has a constituent material made of AlGaInAsSb where 0≤Al+Ga≤0.5 and 0≤As≤1.0, and includes a plurality of layers that differ in impurity concentration, and the center wavelength λ is 2.5 μm or more at room temperature.