Image processing is achieved through the phase conjugate nature of the storage and retrieval process of the photorefractive material, which allows you to recover the exact image even if noise is imparted to the signal before it is stored.
Producing photorefractive materials for optical holographic applications can be expensive and time consuming.
Noise-free image reconstruction has been demonstrated in other photorefractive materials, but Argonne's material is up to 1,000 times more photorefractive.
In a photorefractive material
, these carriers diffuse in all directions.
In some cases these photorefractive materials
have been used to make holographic gratings.
CGHs may be recorded with various materials, such as photorefractive materials
, photopolymers and thermo-plastics [9-10].
for nonvolatile volume holographic data storage.
Dendrimers have already been used in organic electroluminescent devices and as photorefractive materials
These so-called photorefractive materials have the ability to store holograms internally as a pattern of electrical charges.
Previous photorefractive materials required laser intensities 10 times greater than those demanded by the Purdue device.
Photorefractive materials, however, allow researchers to modulate one light beam with another.
Nolte says this dual result -- a high degree of modulation at a relatively low laser intensity -- is a "world record" for photorefractive materials.