Researchers Submit Patent Application, "Method for Polarizing a Terahertz Electromagnetic Wave Using a Polarizer", for Approval

By a News Reporter-Staff News Editor at Electronics Newsweekly -- FromWashington, D.C., VerticalNews journalists report that a patent application by the inventors TAKAHASHI, Kohei (Osaka, JP); KANNO, Tsutomu (Kyoto, JP); SAKAI, Akihiro (Nara, JP); 

http://www.4-traders.com/news/Researchers-Submit-Patent-Application-Method-for-Polarizing-a-Terahertz-Electromagnetic-Wave-Using--17940291/

YAMADA, Yuka (Nara, JP), filed on October 1, 2013, was made available online on February 6, 2014.

The patent's assignee is Panasonic Corporation.

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to a method for polarizing a terahertz electromagnetic wave using a polarizer.

"Terahertz electromagnetic wave is an electromagnetic wave having a frequency of 0.1 THz or more. JP 2009-052920 A, Itsunari Yamada et. al., 'Terahertz wire-grid polarizers with micrometer-pitch Al gratings', Optics Letters, 2009, Vol. 34, No. 3, p.p. 274-276, and Lei Ren et. al., 'Carbon Nanotube Terahertz Polarizer', Nano Letters, 2009, Vol. 9, No. 7, p.p. 2610-2613 disclose a method for polarizing a terahertz electromagnetic wave."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "One non-limiting and exemplary embodiment provides a novel method for polarizing a terahertz electromagnetic wave using a polarizer.

"Additional benefits and advantages of the disclosed embodiments will be apparent from the specification and Figures. The benefits and/or advantages may be individually provided by the various embodiments and features of the specification and drawings disclosure, and need not all be provided in order to obtain one or more of the same.

"In one general aspect, the techniques disclosed here feature; a method for polarizing an electromagnetic wave having a frequency of not less than 0.1 THz and not more than 0.8 THz using a polarizer, the method comprising: a step (a) of preparing the polarizer; wherein the polarizer comprises a sapphire single crystalline layer, and a Ca.sub.xCoO.sub.2 crystalline layer, the Ca.sub.xCoO.sub.2 crystalline layer is stacked on the sapphire single crystalline layer, a surface of the Ca.sub.xCoO.sub.2 crystalline layer has a (010) surface orientation, and the Ca.sub.xCoO.sub.2 crystalline layer has a thickness of not less than 2 micrometers and not more than 20 micrometers; and a step (b) of irradiating the polarizer with the electromagnetic wave having a frequency of not less than 0.1 THz and not more than 0.8 THz to output an output wave having only a component parallel to a c-axis direction of the sapphire single crystalline layer.

"These general and specific aspects may be implemented using a system, a method, and a computer program, and any combination of systems, methods, and computer programs.