Sturman, B.I. and McClelland, T.E. and Webb, D.J. and Shamonina, E. and Ringhofer, K.H. (1995) Investigation Of Photorefractive Subharmonics In The Absence Of Wave Mixing. Journal of the Optical Society of America B-Optical Physics, 12 (9). pp. 1621-1627. ISSN 0740-3224. (The full text of this publication is not available from this repository)
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Using a new optical configuration free from the influence of photorefractive optical nonlinearity, we investigate the main characteristics of the spatial subharmonic K/2 excited in a Bi12SiO20 crystal by a light-intensity pattern with wave Vector K and frequency Omega. It is shown that in a large region of intensity and applied electric field the optimum value Omega of the frequency corresponds to the conditions of parametric excitation of the weakly damped eigenmodes of the medium: the space-charge waves. The threshold and above-threshold characteristics of the subharmonic regime are in good agreement with the theory.
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||I.T. Ekpo|
|Date Deposited:||31 Oct 2009 11:23|
|Last Modified:||31 Oct 2009 11:23|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/19078 (The current URI for this page, for reference purposes)|