| Autor: |
Porras Aguilar R; Departmento de Optica, Instituto Nacional de Astrofisica, Optica y Electronica, Apartado Postal 51 y 216 72000Puebla, Pue. Mexico., Ramirez-San-Juan JC, Baldovino-Pantaleon O, May-Arrioja D, Arroyo Carrasco ML, Iturbe-Castillo MD, Sánchez-de-la-Llave D, Ramos-Garcia R |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2009 Mar 02; Vol. 17 (5), pp. 3417-23. |
| DOI: |
10.1364/oe.17.003417 |
| Abstrakt: |
We explore the polarization dependence of the nonlinear response of a planar nematic liquid crystal cell doped with 1% wt of methyl red dye. The results obtained show that the refractive index change can be switched from a positive value to a negative one as the polarization of the beam changes from parallel to perpendicular with respect to the rubbing direction. This property is exploited in a phase contrast system, where a dynamic phase filter is photoinduced in a liquid crystal cell placed in the system's Fourier plane. Real-time contrast inversion in the resulting images is demonstrated. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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