title: Self-written waveguide in methylene blue sensitized poly(vinyl alcohol)/acrylamide photopolymer material.
abstract: We report the observation of a self-written waveguide inside a bulk methylene blue sensitized poly/vinyl alcohol)/acrylamide photopolymer material. Light from a low power He-Ne laser is focused into the material, and the evolution of the beam is monitored. The refractive index of the material is modulated in the region of high intensity due to photobleaching and photopolymerization effects occurring in the material. As a result, the beam propagates through the medium without any diffraction effects.
authors.affiliation: Department of Physics, Cochin University of Science and Technology, Kochi 682022, India. cpjisha@yahoo.co.in
authors.forename: C P
authors.initials: CP
authors.lastname: Jisha
authors.forename: V C
authors.initials: VC
authors.lastname: Kishore
authors.forename: Beena Mary
authors.initials: BM
authors.lastname: John
authors.forename: V C
authors.initials: VC
authors.lastname: Kuriakose
authors.forename: K
authors.initials: K
authors.lastname: Porsezian
authors.forename: C Sudha
authors.initials: CS
authors.lastname: Kartha