106 citations · 258 across the 11 of their papers we have counts for
11 papers
Photonic Shankar skyrmion
Haiwen Wang, Shanhui Fan
We unveil a new topological quasiparticle of light in 3D space, named the photonic Shankar skyrmion. We show that an elliptically polarized field can be described by an SO(3) order…
Spatiotemporal steering of non-diffracting wavepackets
Haiwen Wang, Cheng Guo, Shanhui Fan
We study the dynamics of space-time non-diffracting wavepackets, commonly known as light bullets, in a spatiotemporally varying medium. We show that by spatiotemporal refraction, a…
Dynamic realization of emergent high-dimensional optical vortices
Dongha Kim, Geonhyeong Park, Yun-Seok Choi +9
The dimensionality of vortical structures has recently been extended beyond two dimensions, providing higher-order topological characteristics and robustness for high-capacity info…
Photonic torons, topological phase transition and tunable spin monopoles
Haijun Wu, Nilo Mata-Cervera, Haiwen Wang +3
Creation and control of topological complex excitations play crucial roles in both fundamental physics and modern information science. Torons are a sophisticated class of 3D chiral…
Metacrystals: Inversely-designed 3D-printed intelligent panels for 6G communications
Mohammad M. Asgari, Peter B. Catrysse, Shuai S. A. Yuan +3
Metasurfaces represent a promising platform for improving coverage in future communication systems. Passive designs are especially attractive because they need no power supply and…
Topological spin defects of light
Haiwen Wang, Charles C. Wojcik, Shanhui Fan
Topological defects are found in a variety of systems, and their existence are robust under perturbations due to their topological nature. Here we introduce a new type of topologic…
Universal behavior of the scattering matrix near thresholds in photonics
Charles C. Wojcik, Haiwen Wang, Meir Orenstein +1
Scattering thresholds and their associated spectral square root branch points are ubiquitous in photonics. In this Letter, we show that the scattering matrix has a simple universal…
Isotropic Topological Second-Order Spatial Differentiator Operating in Transmission Mode
Olivia Y. Long, Cheng Guo, Haiwen Wang +1
Differentiation has widespread applications, particularly in image processing for edge detection. Significant advances have been made in using nanophotonic structures and metamater…
Controllable finite ultra-narrow quality-factor peak in a perturbed Dirac-cone band structure of a photonic crystal slab
Alex Y. Song, Akhil Raj Kumar Kalapala, Ricky Gibson +9
We show that by using a perturbed photonic Dirac-cone, one can realize ultra-narrow and finite Q-factor peak in the wavevector space, with both the peak value and the width separat…
Squeeze free space with nonlocal flat optics
Cheng Guo, Haiwen Wang, Shanhui Fan
There has been substantial interest in miniaturizing optical systems by flat optics. However, one essential optical component, free space, fundamentally cannot be substituted with…
-Symmetric Topological Edge-Gain Effect
Alex Y. Song, Xiao-Qi Sun, Avik Dutt +6
We demonstrate a non-Hermitian topological effect that is characterized by having complex eigenvalues only in the edge states of a topological material, despite the fact that the m…