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physics.optics2022★ 113 cited
Terahertz sensing of highly absorptive water-methanol mixtures with multiple resonances in metamaterials
Min Chen, Leena Singh, Ningning Xu +3
Ultrasensitive terahertz sensing of highly absorptive aqueous solutions remains challenging due to strong absorption of water in the terahertz regime. Here, we experimentally demon…
physics.optics2022★ 17 cited
Ultra-high terahertz index in deep subwavelength coupled bi-layer free-standing flexible metamaterials
Leena Singh, Ranjan Singh, Weili Zhang
We report extensive enhancement in the refractive index of artificially designed metamaterials by exploiting the deep subwavelength coupling in a free-standing, thin-film metal-die…