Journal
OPTICS EXPRESS
Volume 21, Issue 16, Pages 19082-19090Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.019082
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Funding
- National Natural Science Foundation of China [51105300]
- Ph.D. Program Foundation of Ministry of Education of China [20110201120075]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China
- Fundamental Research Funds for the Central Universities of China
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We present the first realized three-dimensional (3D) practical implementation of the so called optical black hole in microwave frequencies, an electromagnetic (EM) concentrator. The 3D EM wave concentrator was designed with non-resonant gradient index (GRIN) 3D woodpile photonic crystals (PCs) structure in metamaterial regime, and fabricated by Stereolithography (SL) process. Omnidirectional EM wave capture and absorbing ability of the device in a broad bandwidth (12GHz-15GHz) were validated by full-wave simulation and experiments. Such devices may have applications in microwave energy harvesting and radiation detector. (c) 2013 Optical Society of America
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