Non-Bragg orders in dynamic self-diffraction on thick phase gratings in a photorefractive polymer.
We demonstrate that recording thick holographic phase gratings in photorefractive polymers can lead not only to very efficient Bragg diffraction but also to rather strong diffraction into non-Bragg orders. We show that this effect has features drastically different from those of Raman-Nath diffraction on thin gratings. We compare the experimental results with a model based on the theory of dynamic self-diffraction in a photorefractive medium. Applications of this effect in devices for optical image processing are proposed.
B L
BL
Volodin
B
B
Kippelen
K
K
Meerholz
N V
NV
Kukhtarev
H J
HJ
Caulfield
N
N
Peyghambarian