Active terahertz metamaterials based on liquid-crystal induced transparency and absorption
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- 作者：Lei Yanga ; Fei Fana ; b ; fanfei_gdz@126.com" class="auth_mail" title="E-mail the corresponding author ; Meng Chena ; Xuanzhou Zhanga ; Sheng-Jiang Changa ; b ; sjchang@nankai.edu.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Terahertz ; Metamaterials ; Liquid crystals
- 刊名：Optics Communications
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：382
- 期：Complete
- 页码：42-48
- 全文大小：3631 K
文摘
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An active THz LC metamaterial is experimentally investigated for THz wave modulation.
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The resonance shift, tunable EIT and EIA are observed in the metamaterial under different DC intensities and directions.
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The phenomena originate from interference and coupling of bright and dark mode in the metamaterial.
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The modes are induced by LC which is indeed a tunable phase retarder and polarization converter.
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The THz modulation depth of active EIT and EIA are 18.3dB and 10.5dB in their frequency band, respectively.