AI Article Synopsis
- The study investigates the photorefractive effect in a specific Pb-based relaxor ferroelectric crystal, marking the first observation of this effect in such materials.
- The crystal was created using a flux solution method, then shaped and electrically poled for testing, resulting in a two-wave mixing coupling constant of 17 cm(-1) and a normalized time constant of 12 seconds.
- Calculations revealed an effective trap density of 5 x 10(16) cm(-3), indicating that holes are the main charge carriers involved in the two-wave mixing energy transfer process.
Article Abstract
The photorefractive effect in a nominally undoped 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 single crystal is measured. We report what is, to our knowledge, the first observation of the photorefractive effect in Pb-based relaxor ferroelectric crystals. The crystal is grown by the flux solution method. Then it is cut into a 2 mm x 4 mm x 8 mm piece and electrically poled along the [111] direction. The coupling constant of the two-wave mixing is 17 cm(-1), and the normalized time constant under 1-W/cm(2) illumination is 12 s at a wave-length of 476 nm. The effective trap density is calculated as 5 x 10(16) cm(-3) from the Debye screening length under the assumption of Kukhtarev's band-transport model. The dominant carrier is identified to be holes from the direction of two-wave mixing energy transfer.
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| http://dx.doi.org/10.1364/ol.28.000420 | DOI Listing |
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