2 papers
physics.app-ph2020
Independent wavefront tailoring in full polarization channels by helicity-decoupled metasurface
Guowen Ding, Ke Chen, Na Zhang +3
Controlling the polarization and wavefront of light is essential for compact photonic systems in modern science and technology. This may be achieved by metasurfaces, a new platform…
math.OC2017
Capped Lp approximations for the composite L0 regularization problem
Qia Li, Na Zhang
The composite L0 function serves as a sparse regularizer in many applications. The algorithmic difficulty caused by the composite L0 regularization (the L0 norm composed with a lin…