Yin Ming, Tian Xiao Yong, Wu Ling Ling, Li Di Chen
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi'an, 710049, China.
Opt Express. 2013 Aug 12;21(16):19082-90. doi: 10.1364/OE.21.019082.
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.
我们展示了首个在微波频率下实现的所谓“光学黑洞”的三维（3D）实际应用，它是一种电磁（EM）集中器。这个三维电磁波集中器是在超材料领域采用非共振梯度折射率（GRIN）三维木堆光子晶体（PCs）结构设计的，并通过立体光刻（SL）工艺制造而成。通过全波模拟和实验验证了该器件在宽频带（12GHz - 15GHz）内的全向电磁波捕获和吸收能力。此类器件可能在微波能量收集和辐射探测器方面有应用。
