4 papers
Overcoming Intrinsic Dispersion Locking for Achieving Spatio-Spectral Selectivity with Misaligned Bi-metagratings
Ze-Peng Zhuang, Xin Zhou, Hao-Long Zeng +6
Spatio-spectral selectivity, the capability to select a single mode with a specific wavevector (angle) and wavelength, is imperative for light emission and imaging. Continuous band…
Topological Nature of Radiation Asymmetry in Bilayer Metagratings
Ze-Peng Zhuang, Hao-Long Zeng, Xiao-Dong Chen +2
Manipulating radiation asymmetry of photonic structures is of particular interest in many photonic applications such as directional optical antenna, high efficiency on-chip lasers,…
High-efficiency grating couplers for pixel-level flat-top beam generation
Zhong-Tao Tian, Ze-Peng Zhuang, Zhi-Bin Fan +2
We demonstrate a kind of grating coupler that generates high quality flat-top beam with a small beamwidth from photonic integrated circuits into free-space. The grating coupler is…
Transmissive Metagrating for Arbitrary Wavefront Shaping Over the Full Visible Spectrum
Zi-Lan Deng, Xuan Ye, Hao-Yang Qiu +10
Metagratings have been shown to form an agile and efficient platform for extreme wavefront manipulation, going beyond the limitations of gradient metasurfaces. Previous approaches…