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 |
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| Rok vydání: | 2009 |
| Předmět: |
Diffraction
Radiation Materials science Birefringence business.industry Physics::Optics Acousto-optics law.invention Ultrasonic grating Optics law Liquid crystal Blazed grating Optoelectronics General Materials Science Crystal optics Electrical and Electronic Engineering business Diffraction grating |
| Zdroj: | Opto-Electronics Review. 17 |
| ISSN: | 1896-3757 |
| DOI: | 10.2478/s11772-008-0074-4 |
| Popis: | 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 any mechanical adjustment. In this work we propose a beam steering device using highly birefringent liquid crystal material. Using a highly birefringent material one can reduce the LC layer thickness needed to achieve 2π of phase modulation and thus reduce the fringing effect caused by deformation of the electric field at the edge of the pixel. Here, we present 1.5-µm thick, high-resolution diffraction grating with non-detectable fringing. |
| Databáze: | OpenAIRE |
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