Futai Hu

TL;DR: In this paper, the authors proposed a universal design strategy for versatile on-chip mode-selective coupling with polarization sensitivity, multiple working wavelengths, and high efficiency concurrently, combining the Jones matrix model with generalized Snell's law under the phase-matching condition.

TL;DR: In this paper, coupled dielectric-metal gratings are investigated for broadband terahertz (THz) wave polarization conversion and asymmetric transmission by the experiments and numerical simulations, which are composed of the subwavelength Si grating and metallic wire grating layers.

TL;DR: A set of ultracompact tunable on-chip waveguide couplers with mode-selectivity and polarization sensitivity around the telecom wavelength of 1.55 μm, under the configuration of graphene-laminated silicon waveguides patterned with gold nanoantennas is proposed.

TL;DR: This chip-integrated metasurface platform further translates the concept of a metAsurface into photonic integrated circuits, serving as a positive paradigm for versatile and complete control over waveguide optical signals and motivating chip-scale applications such as polarization/wavelength demultiplexers, optical switches, and multifunctional mode converters.

TL;DR: In this paper, the authors demonstrate broadband terahertz emission via surface optical rectification from a simple, commercially available 19nm-thick indium tin oxide (ITO) thin film.