论文部分内容阅读
The polymethyl methacrylate(PMMA) film doped with an azo dye ethyl-red(ER) film is employed to demonstrate the properties of an all-optical switch by its photoinduced dichroism and birefringence.We show how to enhance remarkably the modulation depth of all-optical switches almost to 100%by using two linear polarization beams:one beam is inclined at 45°with respect to the probing beam and serves as a pumping beam,and the other beam is perpendicular to the probing beam and used as an erasing beam.Furthermore,a maximum-to-minimum output intensity ratio of 2000:1 is achieved in experiment,which is very useful and important for optical storages and image displays.
The polymethyl methacrylate (PMMA) film doped with an azo dye ethyl-red (ER) film is employed to demonstrate the properties of an all-optical switch by its photoinduced dichroism and birefringence. We show how to enhance remarkably the modulation depth of all- optical switches almost to 100% by using two linear polarization beams: one beam is inclined at 45 ° with respect to the probing beam and serves as a pumping beam, and the other beam is perpendicular to the probing beam and used as an erasing beam. Furthermore, a maximum-to-minimum output intensity ratio of 2000: 1 is achieved in experiment, which is very useful and important for optical storages and image displays.