Polarization and phase-shift properties of high spatial frequency holographic gratings in a photopolymerizable glass.
Polarization properties of transmission volume holographic phase gratings recorded in a photopolymerizable glass modified with high refractive index species are reported. The gratings are recorded by the interference of two parallel s-polarized writing beams with orthogonal propagation directions. High optical quality, low scattering, and diffraction efficiency of 99.4% are achieved. Degrees of polarization of 0.987 and 0.999 are obtained for transmitted and diffracted light, respectively. Furthermore, phase analysis of the transmitted light reveals a phase discontinuity of pi at the Bragg angle.
Martínez-Matos
Oscar
O
Departamento de Optica, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040, Madrid, Spain. omartine@fis.ucm.es
Rodrigo
José A
JA
Calvo
María L
ML
Cheben
Pavel
P