THE EFFECT OF MOLECULAR ORIENTATION IN DISPERSE RED 1 (DR1) FILM ON ITS REFRACTIVE INDEX H. Herman (*). I.G. Narayana, R. Hidayat
Physics of Magnetics and Photonics Reserch Division
Faculty of Natural Sciences and Mathematics
Bandung Institute of Technology
Ganesha 10 Bandung 40132.
*herman[at]fi.itb.ac.id
Abstract
The refractive index of materials is an important physical quantity in the design of various photonic devices. For thin-film based devices, the fabrication method should be compatible with existing processes in microelectronic fabrication and allow for control of the refractive index. In this research, the material used is polar Dispersion Red 1 (DR1) molecule. The film fabrication is carried out using the physical vapor deposition method which has been equipped with an electric polling installation. The poling of the electric field during the deposition process is applied perpendicular to the substrate. The thickness measurement of the films was carried out using a reflectometer where the light was incident perpendicular to the substrate. The refractive index was determined by the multiple beam interference method. As the results, we obtained that the refractive index of thin film will decrease as the electric field increased.
