TY - JOUR
T1 - All-dielectric invisibility cloaks made of BaTiO3-loaded polyurethane foam
AU - Bao, Di
AU - Rajab, Khalid Z.
AU - Hao, Yang
AU - Kallos, Efthymios
AU - Tang, Wenxuan
AU - Argyropoulos, Christos
AU - Piao, Yongzhe
AU - Yang, Shoufeng
PY - 2011/10
Y1 - 2011/10
N2 - Transformation optics has led the way in the development of electromagnetic invisibility cloaks from science fiction to engineering practice. Invisibility cloaks have been demonstrated over a wide range of the electromagnetic spectrum, and with a variety of different fabrication techniques. However, all previous schemes have relied on the use of metamaterials consisting of arrays of sub-wavelength inclusions. We report on the first cloaking structure made of a high-K dielectric-loaded foam mixture. A polyurethane foam mixed with different ratios of barium titanate is used to produce the required range of permittivities, and the invisibility cloak is demonstrated to work for all incident angles over a wide range of microwave frequencies. This method will greatly facilitate the development and large-scale manufacture of a wide range of transformation optics-based structures.
AB - Transformation optics has led the way in the development of electromagnetic invisibility cloaks from science fiction to engineering practice. Invisibility cloaks have been demonstrated over a wide range of the electromagnetic spectrum, and with a variety of different fabrication techniques. However, all previous schemes have relied on the use of metamaterials consisting of arrays of sub-wavelength inclusions. We report on the first cloaking structure made of a high-K dielectric-loaded foam mixture. A polyurethane foam mixed with different ratios of barium titanate is used to produce the required range of permittivities, and the invisibility cloak is demonstrated to work for all incident angles over a wide range of microwave frequencies. This method will greatly facilitate the development and large-scale manufacture of a wide range of transformation optics-based structures.
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U2 - 10.1088/1367-2630/13/10/103023
DO - 10.1088/1367-2630/13/10/103023
M3 - Article
AN - SCOPUS:80054852797
SN - 1367-2630
VL - 13
JO - New Journal of Physics
JF - New Journal of Physics
M1 - 103023
ER -