Achieving Perfect Imaging beyond Passive and Active Obstacles by a Transformed Bilayer Lens

Exciton emissions in bilayer WSe2 tuned by the ferroelectric polymer

In this work, a hybrid integration of few-layer transition metal dichalcogenides (TMDCs) and ferroelectric polymer is designed to achieve passive control of optical properties in-situ. The electrical polarization in ferroelectric P(VDF-TrFE) polymer can regulate the photoluminescence (PL) in few-layer TMDCs. The total PL intensity is substantially suppressed or enhanced under opposite polarization in bilayer WSe2. This is because electrons transfer between valley K and Λ in the conduction band induced by the built-in electric field in P(VDF-TrFE) polymer. This charge transfer further changes t…

双层扭态超材料用于3T MRI

Twist-Tuned Bilayer Metasurface for 3T MRI

本文提出一种双层扭态超材料，通过旋转和调整间隙实现被动MRI超材料的调谐，使设备在负载下仍能保持共振频率，为MRI提供可调的射频附件。

The Boundary Conditions for Point Transformed Electromagnetic Invisibility Cloaks

In this paper we study point transformed electromagnetic invisibility cloaks in transformation media that are obtained by transformation from general anisotropic media. We assume that there are several cloaks located in different points in space. Our results apply in particular to the first order invisibility cloaks introduced by Pendry et al. and to the high order invisibility cloaks introduced by Hendi et al. and by Cai et al.. We identify the appropriate {\it cloaking boundary conditions} that the solutions of Maxwell equations have to satisfy at the outside, $\partial K_+$, and at the insi…

双模高斯态中压缩与纠缠势的等价性研究

On the equivalence between squeezing and entanglement potential for two-mode Gaussian states

该研究针对双模高斯态纠缠势的上界可达性问题，引入一类可饱和上界的更大态集合，提出所有双模高斯态均可通过无源变换转化为该类态的猜想，给出显式变换算法并通过数值测试验证，旨在统一连续变量系统两种量子特性的资源理论。