Guanhai Li

TL;DR: In this paper, an infrared perfect absorber model composed of gold nanobars and a photonic microcavity was presented for the near-infrared frequency region, where the inevitable losses in metamaterials were taken as an advantage for high absorbance efficiency.

TL;DR: High-efficiency polarization-independent vortex beam generators which are capable of transforming the arbitrarily polarized plane wave into a focusing optical vortex beam and an abruptly focusing airy vortex beam are proposed.

TL;DR: Tunable and high-sensitivity sensing based on Fano resonance is analytically and numerically investigated in coupled plasmonic cavities structure and the wavelengths of resonant modes in the plAsmonic stub-pair structure can be adjusted independently, which paves a new way for improving detection sensitivity.

TL;DR: This work introduces a universal approach allowing generation of light with prescribed wavelength, direction, divergence and topological charge via point-excitation of holographic plasmonic metasurfaces to offer novel applications in nano-spectroscopy, nano-chemistry and sensing.

TL;DR: This work proposes a broadband achromatic methodology to implement polarization-controlled multifunctional metadevices in mid-wavelength infrared with birefringent meta-atoms and demonstrates the generation of polarization- controlled and achromatically on-axis focused optical vortex beams with diffraction-limited focal spots and switchable topological charge.