Effect of impurities on the optical properties of KTP single crystals grown from flux

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Zaliani H.; Tafreshi M.Jafar; SOURI D.

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Journal: Iranian Journal of Physics Research Year:2017 | Volume:17 | Issue:4 Page(s): 81-87

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Information Journal Paper

Title

Effect of impurities on the optical properties of KTP single crystals grown from flux

Author(s)

Zaliani H. | Tafreshi M.Jafar | SOURI D. | Issue Writer Certificate

Keywords

spontaneous nucleation methodQ1

KTP crystalsQ1

energy gapQ2

transmission spectrumQ1

flux methodQ1

Abstract

In the present work, KTiOPO4 (KTP) crystals have been grown by spontaneous nucleation technique in flux medium using K6P4O13 flux. Cooling rates of 0. 4-1 ° C/h were applied in the spontaneous nucleation process. The presence and amount of impurities has been determined by using X-Ray Fluorescence (XRF). The optical transmission spectra of impure KTP crystals in the UV– Visible region are discussed. The transmission cut-off is clearly shown at the optical absorption edge, as well as the rapidly reduced absorption with increasing wavelength. It is shown that the presence of impurity shifts the absorption edge of KTP towards lower energy region. The wavelength dependence of absorption coefficient is determined in the UV– visible range, and the characteristics of the optical absorption edge are discussed. Results reveal that the absorption edge and the type of optical charge carrier transition can be attributed to indirect transition for these crystals. It is shown that presence of impurity decreases the indirect band gap (Eg) of KTP crystals, causing the indirect transition absorption edge to move towards lower energy. Also, structural characterization was carried out employing XRD and IR analysis, confirming the growth of KTP crystal.

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APA: Copy

Zaliani, H., Tafreshi, M.Jafar, & SOURI, D.. (2017). Effect of impurities on the optical properties of KTP single crystals grown from flux. IRANIAN JOURNAL OF PHYSICS RESEARCH, 17(4 ), 81-87. SID. https://sid.ir/paper/2036/en

Vancouver: Copy

Zaliani H., Tafreshi M.Jafar, SOURI D.. Effect of impurities on the optical properties of KTP single crystals grown from flux. IRANIAN JOURNAL OF PHYSICS RESEARCH[Internet]. 2017;17(4 ):81-87. Available from: https://sid.ir/paper/2036/en

IEEE: Copy

H. Zaliani, M.Jafar Tafreshi, and D. SOURI, “Effect of impurities on the optical properties of KTP single crystals grown from flux,” IRANIAN JOURNAL OF PHYSICS RESEARCH, vol. 17, no. 4 , pp. 81–87, 2017, [Online]. Available: https://sid.ir/paper/2036/en

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