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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Surface driven reflection tuning in chiral nematic liquid crystals

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de Souza, R. F. [1] ; Lenzi, E. K. [2] ; Evangelista, L. R. [3, 1] ; Martins, F. [4] ; Zola, R. S. [1, 5]
Total Authors: 5
[1] Univ Estadual Maringa, Dept Phys, Ave Colombo 5790, BR-87020900 Maringa, Parana - Brazil
[2] Univ Estadual Ponta Grossa, Dept Phys, BR-87030900 Ponta Grossa, PR - Brazil
[3] Politecn Torino, Dipartimento Sci Applicata, Corso Duca Abruzzi 24, I-10129 Turin - Italy
[4] Fed Univ Technol UTFPR, Lab Mat Macromol & Composites, BR-86812460 Apucarana, Parana - Brazil
[5] Fed Univ Technol UTFPR, Dept Phys, Rua Marcilio Dias 635, BR-86812460 Apucarana, Parana - Brazil
Total Affiliations: 5
Document type: Journal article
Web of Science Citations: 0

Cholesteric liquid crystals (CLCs) are stimuli driven, photonic bandgap materials that can be used for several optical applications, among which color tuning devices and tunable mirrors. Although many methods for controlling the reflection spectra have been proposed, few of them are able to control the position of the reflection notch and its bandwidth altogether. Here we propose a surface driven method to control the reflection notch center position and width based on an active surface. We theoretically formulated the equations involved and solved them to obtain the dynamical configuration of the liquid crystal and the resulting reflection spectra. Both notch position and potential broadening can be obtained using this method. We also identified the range of parameters which results in one of these regimes or a combination of both. Our results can be helpful for designing surface driven optical devices with CLC materials. (AU)

FAPESP's process: 14/50983-3 - INCT 2014: complex fluids
Grantee:Antonio Martins Figueiredo Neto
Support type: Research Projects - Thematic Grants