Low aberration and fast switching microlenses based on a novel liquid crystal mixture
| Autor: | Przemysław Kula, José Francisco Algorri, Noureddine Bennis, José Manuel Sánchez-Pena, Jakub Herman, V. Urruchi |
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| Přispěvatelé: | Comunidad de Madrid, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España) |
| Rok vydání: | 2017 |
| Předmět: |
Permittivity
Materials science Cells Optical zoom Phase (waves) Field Physics::Optics 02 engineering and technology 01 natural sciences 010309 optics Amplitude modulation Lens Optics Liquid crystal 0103 physical sciences Focal length Microlens business.industry Submillisecond response-time Emphasis (telecommunications) Array 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics High-birefringence Electrónica Photonics 0210 nano-technology business Projection system |
| Zdroj: | e-Archivo. Repositorio Institucional de la Universidad Carlos III de Madrid instname |
| ISSN: | 1094-4087 |
| Popis: | In this work, we present a novel kind of LC mixture (5005) for photonic applications, with emphasis on a LC microlens array. This mixture is a nematic composition of three different families of rod like liquid crystals. The key is that frequency dependence of parallel component of electric permittivity is different for each component, resulting in a strongly dependent on frequency dielectric anisotropy. The unique properties of this LC mixture are demonstrated to work in a frequency modulated LC microlens array. A hole patterned structure is used. Thanks to the special characteristics of this mixture, the microlenses are reconfigurable by low voltage signals with variable frequency. This is a first demonstration of a LC lens with tunable focal length by frequency in an analog way. The result of this type of control are microlenses with low aberrations and fast switching (the frequency switching is around 10 times faster than amplitude modulation). The tunability with frequency and the fast switching, makes this liquid crystal of special interest not only for microlenses but for all kind of optical phase modulators. This work was supported by the Research and Development Program through the Comunidad de Madrid (SINFOTON S2013/MIT-2790), the Ministerio de Economía y Competitividad of Spain (TEC2013-47342-C2-2-R) and the funding from Agencia Estatal de Investigación (AEI) and Fondo Europeo de Desarrollo Regional (FEDER) for the Project TEC2016-77242-C3-1-R AEI/FEDER,UE. N Bennis and P Kula acknowledge the Polish Ministry of Science and Higher Education the Statutory Activity PBS-654 and PBS-651 of Military University of Technology respectively. |
| Databáze: | OpenAIRE |
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