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. 23, 2014
Filed:
Aug. 11, 2011
Alexander Frey, Augsburg, DE;
Harry Hedler, Germering, DE;
Philip Clissold Howell, Riemerling, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A photonic crystal, which is a periodically arranged structure made of free-standing columns, has a base material of at least one metal or a metal alloy. Intermediate spaces between the columns allow passage of a gas to be analyzed. The photonic crystal has predefined imperfections, by which at least one resonator is formed, the resonant frequency of which is in a frequency range which is absorbed by a gas component to be detected. A heating unit heats at least some of the columns and at least one detector element extracts the energy present in the resonator in the heated state under the action of the gas to be analyzed. The device may have extremely small dimensions and very low energy consumption.