超常材料的可调谐完美吸收  

Metamaterials-based Tunable Perfect Absorbers

作　　者：李秋泽[1] 郝希平[1] 王静鸽[1] 李新忠[1] 李慧娟[1] 李贺贺[1] 贺健[1] 

机构地区：[1]河南科技大学物理工程学院,河南洛阳471023

出　　处：《激光杂志》2017年第2期1-4,共4页Laser Journal

基　　金：国家自然科学基金(11504091);河南科技大学青年科学基金(13350012)

摘　　要：提出了一种在近红外波段实现超常材料可调谐完美吸收的方法。设计了一种超常材料圆环吸收结构,通过调节内径,详细研究了内径变化对完美吸收共振波长和吸收率的影响。结果表明,当内直径增大到140 nm时,该结构仍有90%以上的吸收率,共振波长漂移了200 nm,实现了可调谐的完美吸收。此外,通过LC磁共振模型和场强分析,更进一步验证了该方法的正确性。这种新的设计方法在保持较高吸收率的基础上实现了可调谐的完美吸收,对于超常材料完美吸收研究和应用提供了重要参考和依据。A method was proposed to achieve a tunable perfect absorbers of metamaterials in the near-infrared region. A absorbing ring structure based on metamaterials was designed. By adjusting the inner diameter, the influences of the perfect absorption resonance wavelength and the absorption were studied detailedly with the changed inner diameter. The results have showed that, the absorption rate was still more than 90% and the resonance wavelength shift of 200 nm with inner diameter increased to 140 nm. A tunable perfect absorbers were realized. In addition, the validity of the method was further verified by LC model and the field strength analysis. This new design method with a high absorption for tunable perfect absorption can provide an important reference and basis for the study and application of metamaterials-based perfect absorption.

关 键 词：超常材料 完美吸收 可调谐 

分 类 号：O438[机械工程—光学工程] TN209[理学—光学]