Michigan Technological University’s invisibility cloak researchers have done it again. They’ve moved the bar on one of the holy grails of physics: making objects invisible.
Just last month, Elena Semouchkina, an associate professor of electrical and computer engineering at Michigan Tech, and her graduate student, Xiaohui Wang, reported successful experimental demonstration of the use of non-conductive ceramic metamaterials to cloak cylindrical objects from microwave-length electromagnetic waves. Previously, Semouchkina had designed a non-conductive glass metamaterial cloak that worked with infrared frequency waves, which are shorter than microwaves.
Then, scarcely was the ink dry on their report in the IEEE Microwave and Wireless Components Letters, a journal published by the Institute of Electrical and Electronics Engineers, when they developed a different cloaking approach and published it in the American Institute of Physics journal, Applied Physics Letters.
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