Enhanced electro-optic effect in potassium lithium tantalate niobate at the paraelectric phase near Tc
| Autor: | Aharon J. Agranat, Yehuda Vidal, Galina Perepelitsa, Yehudit Garcia, Avi Karsenty, Gilad Hirshfeld, Yossef Kabessa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Electro-optic effect General Physics and Astronomy Nano-dipole clusters 02 engineering and technology Photorefractive effect Dielectric The electrooptic effect 021001 nanoscience & nanotechnology Photorefractive optical damage 01 natural sciences Induced polarization lcsh:QC1-999 chemistry.chemical_compound Dipole chemistry Phase (matter) 0103 physical sciences Lithium tantalate Potassium lithium tantalate niobate 0210 nano-technology Refractive index lcsh:Physics |
| Zdroj: | Results in Physics, Vol 23, Iss, Pp 104059-(2021) |
| ISSN: | 2211-3797 |
| DOI: | 10.1016/j.rinp.2021.104059 |
| Popis: | The electrooptic effect in potassium lithium tantalate niobate (KLTN) at the paraelectric phase in close proximity to T c was investigated, and was found to be exceptionally large. At T c + 3 ° C , the electrically induced change in the refractive index was measured to be ≈ 0.014 while high optical quality was maintained. It is also shown that at the paraelectric phase, close to T c , the electrooptic behavior deviates from being directly proportional to the square of the electrically induced polarization P 2 . This is attributed to the influence of dipolar clusters that are formed upon cool-down towards T c . Taking this influence into account, it was shown that the electrooptic effect close to T c remains quadratic, enabling the inhibition of photorefractive optical damage by employing a bi-polar driving voltage. |
| Databáze: | OpenAIRE |
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