Hongsheng Chen

2 months ago | nature.com | Chao Qian |Ido Kaminer |Hongsheng Chen

AbstractThe bidirectional interactions between metamaterials and artificial intelligence have recently attracted immense interest to motivate scientists to revisit respective communities, giving rise to the proliferation of intelligent metamaterials and metamaterials intelligence.

Oct 27, 2024 | nature.com | Ying Li |Yihao Yang |Yidong Chong |Qi Wang |Hongsheng Chen

AbstractBeam shaping and polarization manipulation are of great importance for the design of microcavity lasers. Recently, topological photonic cavities have emerged as excellent platforms for surface-emitting lasers. In this class of lasers, beam engineering has not thus far been extensively studied. Here, we demonstrate how to achieve an intrinsic lateral shift of the beam emitted by a topological laser.

Jun 19, 2024 | opg.optica.org | Fei Gao |Hongsheng Chen |Kai Wang |Yuanzhen Li

Slot-array antennas based on metallic waveguides have been widely used to generate pencil-beams, attracting attention due to their design simplicity and compact size. However, current slot-array antennas possess wavelength-scale profiles, which do not align optimally with the low-profile requisites of contemporary integrated communication and radar systems. Here, we propose a low-profile slot-array antenna designed specifically for the pencil-beam generation.

Mar 14, 2024 | nature.com | Zhe Zhang |Yihao Yang |Hongsheng Chen

AbstractHyperbolic lattices are a new type of synthetic materials based on regular tessellations in non-Euclidean spaces with constant negative curvature. While so far, there has been several theoretical investigations of hyperbolic topological media, experimental work has been limited to time-reversal invariant systems made of coupled discrete resonances, leaving the more interesting case of robust, unidirectional edge wave transport completely unobserved.

Jul 28, 2023 | nature.com | Xiao Lin |Hongsheng Chen

AbstractThe van der Waals heterostructures with aperiodic stackings have been exploited to shape the spatiotemporal wavefront of free-electron X-ray radiation. Free-electron radiation arises from the interaction between fast-moving electrons and matters. It is capable to create the light emission at arbitrary frequency, ranging from microwave, terahertz, infrared, visible, ultraviolet, to X-ray regimes.