一种具有梯度木堆结构的宽带全向电磁波集中器。

A broadband and omnidirectional electromagnetic wave concentrator with gradient woodpile structure.

作者信息

Yin Ming, Tian Xiao Yong, Wu Ling Ling, Li Di Chen

机构信息

State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi'an, 710049, China.

出版信息

Opt Express. 2013 Aug 12;21(16):19082-90. doi: 10.1364/OE.21.019082.

DOI:10.1364/OE.21.019082

PMID:23938822

Abstract

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.

摘要

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。