663 citations · 3k across the 28 of their papers we have counts for
29 papers
Advancements in high refractive index media: from quantum coherence in atomic system to deep sub-wavelength coupling in metamaterials
Leena Singh, Weili Zhang
Refractive index enhancement is crucial in the field of lithography, imaging, optical communications, solar devices and many more. We present a review of advancements in the proces…
Tailoring Terahertz Propagation by Phase and Amplitude Control in Metasurfaces
Jingjing Zheng, Xueqian Zhang, Lixiang Liu +5
Using metasurfaces to control the wave propagation at will has been very successful over the broad electromagnetic spectrum in recent years. By encoding specially designed abrupt c…
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…
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…
Temporal Loss Boundary Engineered Photonic Cavity
Longqing Cong, Jiaguang Han, Weili Zhang +1
Losses are ubiquitous and unavoidable in nature inhibiting the performance of most optical processes. Manipulating losses to adjust the dissipation of photons is analogous to braki…
Observation of superluminal signaling of terahertz pulses
Liang Wu, Zhiyong Wang, Kai Kang1 +4
Superluminal tunneling of light through a barrier has attracted broad interest in the last several decades. Despite the observation of such phenomena in various systems, it has bee…