Liquid Crystal Devices for the Reconfigurable Generation of Optical Vortices

Autor: Jeffrey A. Davis, B. Cerrolaza, Ignacio Moreno, Jorge Albero, Eva Otón, Pascuala García-Martínez, Noureddine Bennis

Publikováno v: Journal of Lightwave Technology. 30:3055-3060

We present two liquid crystal devices specifically designed to dynamically generate optical vortices. Two different electrode geometrical shapes have been lithographically patterned into vertical-aligned liquid crystal cells. First, we demonstrate a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f05c26925f082cb3b137d4d9cffc9703
https://doi.org/10.1109/jlt.2012.2211567

Selective Crosslinking of Polyimide for Photonic Devices

Autor: C. Carrasco, José Manuel Otón, Roman Dąbrowski, Morten Andreas Geday, Noureddine Bennis, A. Spadło, B. Cerrolaza

Publikováno v: Molecular Crystals and Liquid Crystals. 502:185-194

Vertically aligned nematic (VAN) liquid crystals (LC) are interesting for many photonics applications. The performance of VAN cells depends on different factors; the boundary interactions between the LC monolayer and the alignment layer surface are t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c40d75ef69140dbe84270f2c37eb3160
https://doi.org/10.1080/15421400902817031

Dynamics and Electrooptics of Vertically Aligned Nematics With Induced Pretilt on SiOx

Autor: Sol López-Andrés, José Manuel Otón, Noureddine Bennis, B. Cerrolaza, Eva Otón, Carlos Carrasco-Vela

Publikováno v: E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM
instname

The response time and contrast of vertically-aligned negative nematics depend critically on the aligning surface and its induced pretilt. Pretilt can be tuned up using obliquely evaporated inorganic oxides as alignment surface. A thorough study of pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd06ee59fc029f5839c742ef9ecef4c6
https://eprints.ucm.es/id/eprint/14751/1/dynamics_and_Electrooptics_of_Vertically_Aligned_Nematics.pdf

Nearly-analogue blazed phase grating using high birefringence liquid crystal

Autor: B. Cerrolaza, Roman Dąbrowski, D. P. Medialdea, Noureddine Bennis, A. Spadło, Xabier Quintana, José Manuel Otón, Morten Andreas Geday

Publikováno v: Opto-Electronics Review. 17

Diffraction of liquid crystal gratings has been thoroughly studied for many applications such as diffraction optics, optical processing, and spectral analysis. In pure optical processing one varies the direction of propagation of light beam without a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53d72433be00e73fcf88db19805c7bf6
https://doi.org/10.2478/s11772-008-0074-4

Measuring Thickness and Pretilt in Reflective Vertically Aligned Nematic Liquid Crystal Displays

Autor: José Manuel Otón, Noureddine Bennis, Xabier Quintana, Morten Andreas Geday, B. Cerrolaza

Publikováno v: Molecular Crystals and Liquid Crystals, ISSN 1542-1406, 2008, Vol. 494
Archivo Digital UPM
Universidad Politécnica de Madrid

Pretilt angle is a parameter of the utmost importance in the ultimate performance of vertically-aligned negative nematic LC displays. When these devices work in reflective mode, as is the LCOS microdisplays, accurate measurement of pretilt angles bec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35c8ab00ed99bf4b4eed0ef9706696e3
http://oa.upm.es/2819/