Electrically Controllable Molecularization of Terahertz Meta‐Atoms,Advanced Materials

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Electrically Controllable Molecularization of Terahertz Meta‐Atoms
Advanced Materials ( IF 27.4 ) Pub Date : 2018-06-14 , DOI: 10.1002/adma.201802760
Hyunseung Jung ₁ , Jaemok Koo ₂ , Eunah Heo ₁ , Boeun Cho ₂ , Chihun In ₃ , Wonwoo Lee ₄ , Hyunwoo Jo ₂ , Jeong Ho Cho ₅ , Hyunyong Choi ₃ , Moon Sung Kang ₂ , Hojin Lee _{1,

4}

Affiliation

Active control of metamaterial properties is critical for advanced terahertz (THz) applications. However, the tunability of THz properties, such as the resonance frequency and phase of the wave, remains challenging. Here, a new device design is provided for extensively tuning the resonance properties of THz metamaterials. Unlike previous approaches, the design is intended to control the electrical interconnections between the metallic unit structures of metamaterials. This strategy is referred to as the molecularization of the meta‐atoms and is accomplished by placing graphene bridges between the metallic unit structures whose conductivity is modulated by an electrolyte gating. Because of the scalable nature of the molecularization, the resonance frequency of the terahertz metamaterials can be tuned as a function of the number of meta‐atoms constituting a unit metamolecule. At the same time, the voltage‐controlled molecularization allows delicate control over the phase shift of the transmitted THz, without changing the high transmission of the materials significantly.

中文翻译：

太赫兹亚原子的电可控分子化

主动控制超材料的性能对于先进的太赫兹（THz）应用至关重要。但是，太赫兹特性的可调谐性，例如谐振频率和波的相位，仍然具有挑战性。在这里，提供了一种新的设备设计，可以广泛地调节太赫兹超材料的共振特性。与以前的方法不同，该设计旨在控制超材料的金属单元结构之间的电气互连。这种策略称为亚原子的分子化，是通过在金属单元结构之间放置石墨烯桥来实现的，金属单元结构的电导率由电解质门控来调节。由于分子化的可扩展性，太赫兹超材料的共振频率可以根据构成单元超分子的超原子数进行调节。同时，电压控制的分子化技术可以精确控制透射THz的相移，而不会显着改变材料的高透射率。

更新日期：2018-06-14

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