Flat optics has emerged as a key player in the area of structured light and its applications,
owing to its subwavelength resolution, ease of integration, and compact footprint. Although …

Resonant waveguide gratings (RWGs), also known as guided mode resonant (GMR)
gratings or waveguide‐mode resonant gratings, are dielectric structures where these …

Wire grid polarizers (WGPs), periodic nano‐optical metasurfaces, are convenient polarizing
elements for many optical applications. However, they are still inadequate in the deep …

Periodic structures with a sub‐wavelength pitch have been known since Hertz conducted his
first experiments on the polarization of electromagnetic waves. While the use of these …

Although metasurfaces have shown great potential for manipulating light, most previously
realized meta-devices suffer from uncontrolled angular dispersions, making them …

The coupled-wave method formulated by Moharam and Gaylord [J. Opt. Soc. Am. 73, 451
(1983)] is known to be slowly converging, especially for TM polarization of metallic lamellar …

We propose and experimentally demonstrate a novel multimode ultra-compact mode (de)
multiplexer for highly integrated on-chip mode-division multiplexing systems. This device is …

In a world that is as colorful as ours, it is not surprising to find that colors produced in nature
by a variety of creatures have attracted the attention of scientific giants such as Newton …

Passive radiative cooling, radiating energy from objects to the outer space through the
Earth's atmospheric window, offers promising solutions for passive building cooling and …

Free-standing nanofins or pillar meta-atoms are the most common constituent building
blocks in metalenses and metasurfaces in general. Here, we present an alternative …