Direct-tuning methods for semiconductor metamaterials

被引：6

作者：

Min, Li ^{[1
]}

Wang, Wenjin ^{[1
]}

Huang, Lirong ^{[2
]}

Ling, Yonghong ^{[2
]}

Liu, Tongjun ^{[2
]}

Liu, Jing ^{[3
]}

Luo, Chaoming ^{[3
]}

Zeng, Qingdong ^{[4
]}

机构：

[1] Hunan Inst Sci & Technol, Dept Phys & Elect, Yueyang 414000, Peoples R China

[2] Huazhong Univ Sci & Technol, WNLO, Wuhan 430074, Hubei, Peoples R China

[3] Hunan Inst Sci & Technol, Coll Informat & Commun Engn, Yueyang 414000, Peoples R China

[4] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

基金：

中国国家自然科学基金;

关键词：

ELECTROMAGNETICALLY INDUCED TRANSPARENCY; ANALOG;

D O I：

10.1038/s41598-019-54066-5

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Among various tunable optical devices, tunable metamaterials have exhibited their excellent ability to dynamically manipulate lights in an efficient manner. However, for unchangeable optical properties of metals, electromagnetic resonances of popular metallic metamaterials are usually tuned indirectly by varying the properties or structures of substrates around the resonant unit cells, and the tuning of metallic metamaterials has significantly low efficiency. In this paper, a direct-tuning method for semiconductor metamaterials is proposed. The resonance strength and resonance frequencies of the metamaterials can be significantly tuned by controlling free carriers' distributions in unit cells under an applied voltage. This direct-tuning method has been verified in both two-dimensional and three-dimensional semiconductor metamaterials. In principle, the method allows for simplifying the structure of tunable metamaterials and opens the path to applications in ultrathin, linearly-tunable, and on-chip integrated optical components (e.g., tunable ultrathin lenses, nanoscale spatial light modulators and optical cavities with resonance modes switchable).

引用

页数：6

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