Gaofeng Liang

TL;DR: Super-oscillations are band-limited functions with the counterintuitive property that they can vary arbitrarily faster than their fastest Fourier component, over arbitrarily long intervals as discussed by the authors, which has implications for information theory and applications to optical vortices, sub-wavelength microscopy and related areas of nanoscience.

TL;DR: This work proposes a metalens based on an all-dielectric metasurface with a sub-wavelength unit size of 0.39λ for terahertz wave imaging and experimentally demonstrate its performance in focusing and imaging, and demonstrates the reversibility of the metalens for imaging.

TL;DR: To achieve high-NA and polarization-free operation, a polarization-independent dielectric metasurface with a sub-wavelength period of 0.4λ is proposed that has potential applications in THz imaging, spectroscopy, information processing, and communications, among others.