In this work, S.V. Serak and coworkers gather the most recent advances in the development of new-generation diffractive waveplate arrays. Advanced functionalities, like high-resolution beam shapers and vector vortex waveplates, are demonstrated by designing highly complex architectures made of several overlapped waveplate arrays. High tunability of these devices is achieved by using low-voltage electrical signals to control the orientation of a liquid crystal layer of only a few microns in thickness, thus achieving extremely compact beam steering devices, tunable lenses, and controllable polarization filters. Furthermore, large-area diffractive waveplate arrays are realized on arbitrary (even flexible) substrates by fast and low-cost fabrication processes.
It seems that diffractive waveplate arrays have the right stuff to revolutionize electro-optical devices in many fields of application, such as displays, smart windows, optical communications, beam shaping, and optical communications. A new avenue is open…
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