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 …

During the past few years, metasurfaces have been used to demonstrate optical elements
and systems with capabilities that surpass those of conventional diffractive optics. Here, we …

This paper presents a comprehensive survey on acquisition, tracking, and pointing (ATP)
mechanisms used in free-space optical (FSO) communications systems. ATP mechanisms …

Polarization, the path traced by light's electric field vector, appears in all areas of optics. In
recent decades, various technologies have enabled the precise control of light's polarization …

Geometric phase is a unifying and central concept in physics, including optics. As a matter of
fact, optics played a pivotal role from the inception of this new paradigm, as some of the first …

The polarization of light plays a central role in its interaction with matter, in situations ranging
from familiar (for example, reflection and transmission at an interface) to sophisticated (for …

Space-variant Pancharatnam–Berry phase optical elements based on computer-generated
subwavelength gratings are presented. By continuously controlling the local orientation and …

Continuous, wide field-of-view, high-efficiency, and fast-response beam steering devices are
desirable in a plethora of applications. Liquid crystals (LCs)—soft, bi-refringent, and self …

We demonstrate a broadband, thin-film, polarizing beam splitter based on an anisotropic
diffraction grating composed of reactive mesogens (polymerizable liquid crystals). This …

Liquid-crystal-based Pancharatnam–Berry phase optical elements (PBOEs), also known as
diffractive wave plates (DWPs), geometric phase optics (GPO), or geometric phase …