Elementary holographic gratings, that are recorded by visible light in iron-doped photorefractive lithium-niobate crystals, are erased by homogeneous x-ray illumination. The speed of erasure is measured depending on crystal parameters and on the acceleration voltage of the x-ray tube. A simple model is proposed to explain the dependence of the x-ray conductivity on the doping level and oxidation / reduction state. Furthermore, hologram erasure by x-rays is used to build an x-ray imaging system with a high spatial resolution. X-rays yield a conductivity pattern that erases an elementary holographic grating locally. The diffracted visible light now bears the x-ray image. Structures of 25 µm size are easily resolved with a dose of 90 Gray and a signal-to-noise ratio of 6. Such a detector may combine outstanding spatial resolution with the ability to detect hard x-rays without any fading.

© 2003 Optical Society of America

PDF Article
More Like This
Photorefractive X-ray imaging

D. Berben, B. Andreas, and K. Buse
26 Photorefractive Effects, Materials, and Devices (PEMD) 2001

High resolution x-ray diffraction imaging of photorefractive gratings in barium titanate

Gerard Fogarty, Mark Cronin-Golomb, Bruce Steiner, and Uri Laor
CFH5 Conference on Lasers and Electro-Optics (CLEO) 1993

Nanoscale X-ray Imaging

Anne Sakdinawat
NMB5 Novel Techniques in Microscopy (NTM) 2009


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription