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01297 am a22001813u 4500 |
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78523 |
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|a dc
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|a Youden, K.E.
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|a James, S.W.
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|a Eason, R.W.
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|a Chandler, P.J.
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|a Zhang, L.
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|a Townsend, P.D.
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|a Photorefractive planar waveguides in BaTiO<sub>3</sub> fabricated by ion-beam implantation
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|c 1992.
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|z Get fulltext
|u https://eprints.soton.ac.uk/78523/1/293P.pdf
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|a For the first time to our knowledge, photorefractive properties have been observed in planar waveguides fabricated by the technique of ion-beam implantation in BaTiO<sub>3</sub> single crystals. The implantation was carried out by using 1.5 MeV H<sup>+</sup> ions at a dose of 10<sup>-16</sup> ions/cm<sup>2</sup>. For a given input power, a decrease in the effective photo-refractive two-beam coupling response time of ≥10<sup>2</sup> has been observed, owing to a combination of optical confinement within the waveguide and possible modification of charge-transport properties induced through implantation. Experiments carried out on the two-beam coupling gain show that the gain direction has been reversed in the waveguide compared with that of the bulk crystal.
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