Abstract：
:In this work, a novel technique to create positive-negative tunable liquid crystal lenses is proposed and experimentally demonstrated. This structure is based on two main elements, a transmission line acting as a voltage divider and concentric electrodes that distribute the voltage homogeneously across the active area. This proposal avoids all disadvantages of previous techniques, involving much simpler fabrication process (a single lithographic step) and voltage control (one or two sources). In addition, low voltage signals are required. Lenses with switchable positive and negative focal lengths and a simple, low voltage control are demonstrated. Moreover, by using this technique other optical devices could be engineered, e.g. axicons, Powell lenses, cylindrical lenses, Fresnel lenses, beam steerers, optical vortex generators, etc. For this reason, the proposed technique could open new venues of research in optical phase modulation based on liquid crystal materials.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Algorri JF,Morawiak P,Bennis N,Zografopoulos DC,Urruchi V,Rodríguez-Cobo L,Jaroszewicz LR,Sánchez-Pena JM,López-Higuera JMdoi
10.1038/s41598-020-67141-zsubject
Has Abstractpub_date
2020-06-23 00:00:00pages
10153issue
1issn
2045-2322pii
10.1038/s41598-020-67141-zjournal_volume
10pub_type
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