Artículos de revistas
Measurement of the electro-optic coefficient during the photoelectric-field assisted poling using a Mach-Zehnder interferometer
Fecha
2016-12-01Registro en:
Review of Scientific Instruments, v. 87, n. 12, 2016.
1089-7623
0034-6748
10.1063/1.4969057
2-s2.0-85003004997
2-s2.0-85003004997.pdf
Autor
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
Institución
Resumen
This work describes the experimental apparatus based on the Mach-Zehnder interferometer for measuring the electro-optic coefficient during and after the photo-assisted poling process using a continuous light excitation. We also show that the poling can be performed at cryogenic temperatures. The setup is based on the superposition of a Mach-Zehnder AC modulation voltage on the DC bias voltage required to promote the chromophore orientation during light excitation. The effect of the reversible polarization due to the DC bias voltage applied to the polymer film is considered to calculate the electro-optic coefficient during the photo-assisted poling process. The usefulness of our setup is demonstrated with three polymer films, with different electro-optic activities: guest-host, copolymer, and homopolymer, all based on methyl methacrylate monomers and containing disperse red-1 chromophores.