Frequency-tunable terahertz angular selective based on a dielectric-graphene multilayer structure

Wu Feng; Long Yang; Li Hongju; Chen Ying; Pan Meiyan; Wu Xiaohu

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Frequency-tunable terahertz angular selective based on a dielectric-graphene multilayer structure

机译：基于电介质 - 石墨烯多层结构的频率可调太赫兹角度选择性

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To achieve frequency-tunable angular selectivity at terahertz frequencies, a tunable epsilon-near-zero (ENZ) meta-material based on a subwavelength dielectric-graphene multilayer structure is designed. The ENZ frequency of the dielectric-graphene multilayer can be dynamically tuned by the gate voltage applied to graphene. Transmittance angular spectra show that only the incident lights close to normal incidence can propagate through the structure while other incident lights cannot, which indicates that our structure can be utilized for frequency-tunable terahertz angular selection. The optimal directivity D reaches 183 and the transmittance at normal incidence reaches 0.462. This multilayer-based tunable terahertz ENZ metamaterial will possess potential application prospects in tunable highly directive antennas. (C) 2021 Optical Society of America

机译：为了在太赫兹频率下实现频率可调谐的角度选择性，设计了一种基于亚波长介电石墨烯多层结构的可调谐ε近零（ENZ）超材料。介电石墨烯多层膜的ENZ频率可以通过施加在石墨烯上的栅极电压进行动态调节。透射角谱表明，只有接近正入射的入射光才能通过该结构，而其他入射光则不能，这表明我们的结构可以用于频率可调太赫兹角选择。最佳方向性D达到183，正入射时的透过率达到0.462。这种基于多层膜的可调谐太赫兹ENZ超材料在可调谐高指向性天线中具有潜在的应用前景。（2021）美国光学学会

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《Applied optics》 |2021年第10期|共6页
作者
Wu Feng; Long Yang; Li Hongju; Chen Ying; Pan Meiyan; Wu Xiaohu;
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Guangdong Polytech Normal Univ Sch Optoelect Engn Guangzhou 510665 Peoples R China;

Tongji Univ Sch Phys Sci &

Engn Ctr Phonon &

Thermal Energy Sci China EU Joint Ctr Nanophonon Shanghai Key Lab Sp Shanghai 200092 Peoples R China;

Hefei Univ Technol Sch Elect Sci &

Appl Phys Hefei 230009 Peoples R China;

Huaqiao Univ Coll Informat Sci &

Engn Fujian Prov Key Lab Light Propagat &

Transformat Xiamen 361021 Peoples R China;

Jihua Lab Foshan 528000 Peoples R China;

Shandong Inst Adv Technol Jinan 250100 Peoples R China;

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2. Frequency-tunable continuous-wave random lasers at terahertz frequencies [J] . Simone Biasco, Harvey E.Beere, David A.Ritchie, 光：科学与应用（英文版） . 2019,第003期
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5. Experimental demonstration of tunable refractometer based on orbital angular momentum of longitudinally structured light [J] . Ahmed H.Dorrah, Michel Zamboni-Rached, Mo Mojahedi 光：科学与应用（英文版） . 2018,第005期
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Frequency-tunable terahertz angular selective based on a dielectric-graphene multilayer structure

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