Since their first introduction in 2006, q-plates have found a constantly increasing number of
uses in diverse contexts, ranging from fundamental research on complex structured light …

Optical vortices are attracting much attention because of their applications in various fields of
optical processing, communications, enhanced imaging systems, and bio-inspired devices …

Topological defects in nematic liquid crystals are ubiquitous. The defects are important in
understanding the fundamental properties of the systems, as well as in practical …

Since optical vortex (OV) beams possess an additional degree of freedom, orbital angular
momentum, the beams can be utilized to enhance signal modulation in optical …

We report on a programmable liquid crystal spatial light modulator enabling independent
orbital angular momentum state control on multiple spectral channels. This is done by using …

Topological defects in liquid crystal (LC) phases have been considered critical from the
areas in topology and self‐assembly, as well as in applications such as optical vortex …

In this work we study a prototype q-plate segmented tunable liquid crystal retarder device. It
shows a large modulation range (5π rad for a wavelength of 633 nm and near 2π for 1550 …

Matter under different equilibrium conditions of pressure and temperature exhibits different
states such as solid, liquid, gas, and plasma. Exotic states of matter, such as Bose–Einstein …

In this work we show the capability to form various q-plate equivalent systems using
combinations of commercially available q-plates. We show operations like changing the sign …

Achieving tunable physical properties is currently one of the most exciting research topics. In
order to realize this goal, a medium that is responsive to external stimuli and can undergo a …