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:
Jun. 17, 2014
Filed:
Aug. 23, 2012
Connie Chang-hasnain, Palo Alto, CA (US);
Christopher Chase, Kensington, CA (US);
Fanglu LU, Berkeley, CA (US);
Forrest G. Sedgwick, Berkeley, CA (US);
Igor Karagodsky, Brighton, MA (US);
Connie Chang-Hasnain, Palo Alto, CA (US);
Christopher Chase, Kensington, CA (US);
Fanglu Lu, Berkeley, CA (US);
Forrest G. Sedgwick, Berkeley, CA (US);
Vadim Karagodsky, Berkeley, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
Planar lenses and reflectors are described comprising subwavelength high-contrast gratings (HCG) having high index of refraction grating elements spaced apart from one another in straight and/or curved segments and surrounded by low index material. The high-contrast grating is configured to receive an incident wave which excites multiple modes within the high-contrast grating and is focused for reflection and/or transmission by said high contrast grating. The width of the high contrast grating bars vary along a distribution direction of the grating bars which is perpendicular to the length of the grating bars and/or varies along the length of one or more grating bars to focus said reflection and/or transmission. The HCG is configured to provide double focusing, whose use is exemplified within a vertical cavity surface emitting laser (VCSEL) structure using focusing HCG structures for both the top and bottom mirrors.