Erasure of elementary holograms in LiNbO3:Fe by neutron irradiation

Gabor Mandula; Romano A. Rupp; M. Balaskó

doi:10.1117/12.676860

9 June 2006 Erasure of elementary holograms in LiNbO₃:Fe by neutron irradiation

Gabor Mandula, Romano A. Rupp, M. Balaskó

Proceedings Volume 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information; 62520N (2006) https://doi.org/10.1117/12.676860
Event: Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 2005, Varna, Bulgaria

Abstract

Experimental studies on the erasure effect of thermal neutron irradiation on elementary photorefractive hologram in LiNbO₃:Fe single crystals are reported. This phenomenon results from the large effective cross-section of ⁶Li for thermal neutrons and from the large number of the electrons excited to the conduction band by the kinetic energy that is released during the neutron generated α-decay of ⁶Li nuclei. The excited electrons decrease the electric space-charge field of the previously recorded holographic grating and decrease its diffraction efficiency. The sensitivity threshold of the effect is better than 53 mSv (4×10⁹ cm^-2 fluence) at neutron energy of 0. 17 eV. Discussion of potential application ofthe phenomenon is also given.

Citation Download Citation

Gabor Mandula, Romano A. Rupp, and M. Balaskó "Erasure of elementary holograms in LiNbO₃:Fe by neutron irradiation", Proc. SPIE 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 62520N (9 June 2006); https://doi.org/10.1117/12.676860

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