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:
Dec. 07, 2010
Filed:
Jul. 10, 2008
William Ted Masselink, Berlin, DE;
Sebastian Dressler, Berlin, DE;
Mykhaylo Petrovych Semtsiv, Berlin, DE;
Nikolai Georgiev, Dresden, DE;
Manfred Helm, Dresden, DE;
Thomas Dekorsy, Grosserkmannsdorf, DE;
Mathias Ziegler, Berlin, DE;
William Ted Masselink, Berlin, DE;
Sebastian Dressler, Berlin, DE;
Mykhaylo Petrovych Semtsiv, Berlin, DE;
Nikolai Georgiev, Dresden, DE;
Manfred Helm, Dresden, DE;
Thomas Dekorsy, Grosserkmannsdorf, DE;
Mathias Ziegler, Berlin, DE;
Humboldt-Universtaet Zu Berlin, Berlin, DE;
Forschungszentrum Rossendorf e.V., Dresden, DE;
Abstract
A quantum cascade laser structure in accordance with the invention comprises a number of cascades (), each of which comprises a number of alternately arranged quantum wells (to) and barrier layers (to). The material of at least one quantum well (to) as well as the material of at least one barrier layer (to) is under mechanical strain, with the respective strain being either a tensile strain or a compression strain. The quantum wells (to) and barrier layers (to) are engineered in the quantum cascade laser structure in accordance with the invention so that existing strains are largely compensated within a cascade (). In the quantum cascade laser structure in accordance with the invention, each material of the quantum wells (to) has only one constituent material and the material of at least one barrier layer () has at least two constituent materials ().