Multiple Metamaterial Pattern Integration for Polarization Selective Photodetector Applications
Multiple Metamaterial Pattern Integration for Polarization Selective Photodetector Applications
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DOI：
10.1557/adv.2018.43
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发表时间：
2018-07
期刊：
影响因子：
0.8
通讯作者：
C. Shemelya;N. Pfiester;Dante F. DeMeo;T. Rotter;G. Balakrishnan;T. Vandervelde
中科院分区：
文献类型：
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作者：
C. Shemelya;N. Pfiester;Dante F. DeMeo;T. Rotter;G. Balakrishnan;T. Vandervelde
由于具有可调谐、可切换和可扩展的光学响应潜力，人们对有源超材料（MM）器件的兴趣最近有所增加。更具体地说，动态片上MM偏振器的应用范围从材料表征到传感，而不需要繁琐的外部滤波器。这项工作展示了通过结合分环谐振器、线对和渔网模式的元素来优化MM器件的动态极化滤波的努力。极化栅被设计为在模拟开/关比为75%、动态极化选择性为70%的外加电压下工作。利用不同n型掺杂浓度的蓝宝石外延砷化镓制备样品以近似电调谐。
Interest in active metamaterial (MM) devices has recently increased due to their potential for tunable, switchable, and scalable optical responses. More specifically, a dynamic, on-chip MM polarizer has applications ranging from material characterization to sensing without the need for cumbersome external filters. This work demonstrates efforts to optimize MM devices for dynamic polarization filtering by combining elements from split-ring resonators, wire-pairs, and fishnet patterns. The polarization grid has been designed to operate under an applied voltage with simulated on/off ratios of 75% and dynamic polarization selectivity of 70%. Samples have been fabricated using epitaxial GaAs on sapphire with various n-type doping concentrations to approximate electrical tuning.