Spectral-spatial redistribution of self-trapped excitonic emission in thin anatase films

V. Kiisk; Ilmo Sildos; O. Sild; Jaan Aarik

doi:10.1117/12.531224

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19 November 2003 Spectral-spatial redistribution of self-trapped excitonic emission in thin anatase films

V. Kiisk, Ilmo Sildos, O. Sild, Jaan Aarik

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Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.531224
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

Far-field intensity distribution of self-trapped exciton (STE) photoluminescence (PL) of TiO₂ (anatase) thin films grown on SiO₂ and MgO substrates was studied at temperature of 5 K. The spectrum recorded from a cleaved edge of the substrate in the direction nearly parallel to the film surface showed that the emission field was partly modified into two spectrally narrow, polarized, spatially directed modes. The effect was interpreted as a constructive interference of the emission leaving the anatase film nearly at the critical angle of total internal reflection.

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V. Kiisk, Ilmo Sildos, O. Sild, and Jaan Aarik "Spectral-spatial redistribution of self-trapped excitonic emission in thin anatase films", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.531224

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