Author(s): Gilad Rosenblatt and Meir OrensteinIt has recently been shown that passive lens designs can retain perfect lensing despite intrinsic loss in the comprising left-handed materials. Here we show that energy conservation is not at odds with the operation of such lossy perfect lenses: The irreversible transfer of electromagnetic power to … [Phys....

Author(s): Shuibao Qi, Yong Li, and Badreddine AssouarThe authors describe a coiling−up−space approach to harvesting energy from ubiquitous, ambient low-frequency sound. They design multilateral metasurfaces composed of a labyrinthine series, for acoustic focusing and energy confinement. Control of the first reflection, coupling effects, and multiple...

Author(s): Pierre Delplace, Michel Fruchart, and Clément TauberWe investigate the topological properties of dynamical states evolving on periodic oriented graphs. This evolution, which encodes the scattering processes occurring at the nodes of the graph, is described by a single-step global operator, in the spirit of the Ho-Chalker model. When the successive...

Author(s): Weimin Ye, Xiaodong Yuan, Chucai Guo, Jianfa Zhang, Biao Yang, and Shuang ZhangChiroptical effects, characterized by different optical responses for light with left- and right-handed polarizations, are extremely weak in natural materials. Strong effects have been limited to complex three-dimensional metamaterials, but now the authors find...

Author(s): Weijie Luo, Shulin Sun, He-Xiu Xu, Qiong He, and Lei ZhouDevices for manipulating spin-polarized light in transmission (not reflection) mode are highly desired in photonics research. To this end, the authors craft a Pancharatnam-Berry metasurface of subwavelength thickness λ/8 with a 91% efficient photonic spin Hall effect, at microwave frequencies....

Author(s): Zhuo Li, Liangliang Liu, Hengyi Sun, Yunhe Sun, Changqing Gu, Xinlei Chen, Yun Liu, and Yu LuoTraditional plasmons in a metal enable light to be focused beyond the diffraction limit, but the large dissipative losses at optical frequencies seriously limit practical applications. Taking advantage of the structural dispersion of waveguide modes...