Research Progress
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Fast design method of smooth freeform lens with an arbitrary aperture for collimated beam shapingYongjun Xie’s research team present a method for the fast design of a smooth freeform lens to tailor a collimated light beam with an arbitrary contour. This method begins by calculating an initial surface based on a simplified ray mapping. Then the surface...Nov 27, 2019 -
Muti-stage learning for gender and age predictionAutomatic gender and age prediction has become relevant to an increasing amount of applications, particularly under the rise of social platforms and social media. However, the performances of existing methods on real-world images are still not satisfactory ...Nov 27, 2019 -
Optical sorting of small chiral particles by tightly focused vector beamsThe identification and separation of substances by chirality has always been an important problem in biomedical research and industry. Light beams carry optical momentum, and can exert optical force on any object they impinge due to the transfer of momentum...Nov 27, 2019 -
Reconstruction of noisy images via stochastic resonance in nematic liquid crystalsHongjun Liu’s research team employed nematic liquid crystals as the nonlinear medium to recover noisy images via stochastic resonance, in which nonlinear coupling allows signals to grow at the expense of noise. The process is theoretically analyzed and the...Nov 27, 2019 -
Wenfu Zhang’s research team predicted that Multidimensional Manipulation of Photonic Spin Hall Effect with a Single‐Layer Dielectric MetasurfaceThe photonic spin Hall effect, originating from photonic spin-orbit interactions, has attracted considerable research interest due to its potential for applications in spin-controlled nanophotonics. However, most research efforts have focused only on 1D mod...Nov 27, 2019