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There is an increasing need to control light phase with tailored precision via simple means in both fundamental science and industry. One of the best candidates to achieve this goal are electro-optical materials. In this work, a novel technique to modulate the spatial phase profile of a propagating light beam by means of liquid crystals (LC), electro-optically addressed by indium-tin oxide (ITO) grating microstructures, is proposed and experimentally demonstrated. A planar LC cell is assembled between two perpendicularly placed ITO gratings based on microstructured electrodes. By properly selecting only four voltage sources, we modulate the LC-induced phase profile such that non-diffractive Bessel beams, laser stretching, beam steering, and 2D tunable diffraction gratings are generated. In such a way, the proposed LC-tunable component performs as an all-in-one device with unprecedented characteristics and …
Nature Publishing Group
Publication date: 
14 Aug 2020

JF Algorri, Przemysław Morawiak, DC Zografopoulos, Noureddine Bennis, A Spadlo, L Rodríguez-Cobo, Leszek Roman Jaroszewicz, JM Sánchez-Pena, José Miguel López-Higuera

Biblio References: 
Volume: 10 Issue: 1 Pages: 1-10
Scientific reports