Chinese Optics Letters, 2012, 10 (4): 042301, Published Online: Jan. 19, 2012  

Growth and optical properties of Cr3+-doped CdWO4 single crystals Download: 927次

Author Affiliations
Abstract
A high-quality Cr3+:CdWO4 single crystal at a size of approximately \Phi 25 \times 80 mm is grown using the Bridgman method with CdO, WO3, and Cr2O3 as raw materials and their molar ratio of 100:100:0.5. The temperature gradient of solid-liquid interface at growth is approximately 50 oC/cm and the growth rate is 0.05 mm/h. The X-ray diffraction (XRD), absorption, excitation, and emission spectra of different parts of the as-grown and O2-annealed crystals are investigated. Two strong broad optical absorption bands of about 472 and 708 nm are observed, and they are associated with the transitions 4A2->4T1 and 4A2->4T2. The weak 4T2->2E transition (the R-line) at 632 nm is also observed. The crystal-field parameter Dq and the Racah parameters B and C are estimated to be 1 412.4, 776.8, and 3 427.6 cm-1, respectively, according to the absorption spectra and crystal-splitting theory. A broadband fluorescence at about 1 000 nm due to 4T2->4A2 transition is produced by exciting the samples at 675 nm. After being annealed in an O2 atmosphere, the crystals become more transparent, while the effective light absorption of Cr3+ ions is evidently enhanced and the emission intensity is also strengthened due to the reduction of oxygen vacancies in the CdWO4 crystal after annealing.
References

[1] D. Ye, D. Li, W. Chen, Y. Shao, G. Xiao, M. Sun, and X. Fu, Res. Chem. Intermed. 35, 675 (2009).

[2] M. Guzik, E. Tomaszewicz, S. M. Kaczmarek, J. Cybinska, and H. Fuks, J. Non-Cryst. Solids 356, 1902 (2010).

[3] N. Y. Garces, M. M. Chirila, H. J. Murphy, J. W. Foise, E. A. Thomas, C. Wicks, K. Grencewicz, L. E. Halliburton, and N. C. Giles, J. Phys. Chem. Solids 64, 1195 (2003).

[4] H. Xia, H. Song, J. Wang, J. Zhang, T. Wang, J. Zhang, Y. Zhang, and Q. Nie, Cryst. Res. Technol. 40, 199 (2005).

[5] I. Nikolov, X. Mateos, F. Guell, J. Massons, V. Nikolov, P. Peshev, and F. Diaz, Opt. Mater. 25, 53 (2004).

[6] E. Cavalli, A. Belletti, and M. G. Brik, J. Phys. Chem. Solids 69, 29 (2008).

[7] I. Sokolska and S. Kuck, Spectrochim. Acta Part A 54, 1695 (1998).

[8] G. Wang, X. Long, L. Zhang, G. Wang, S. Polosan, and T. Tsuboi, J. Lumin. 128, 1556 (2008).

[9] H. Teng, S. Zhou, H. Lin, T. Jia, X. Hou, and J. Wang, Chin. Opt. Lett. 8, 414 (2010).

[10] Q. Fang, H. Chen, F. Xu, S. Wang, Z. Liang, and C. Jiang, Chin. Opt. Lett. 8, 1071 (2010).

[11] H. Xiao, H. Chen, F. Xu, C. Jiang, and P. Yang, J. Chin. Ceramic Soc. (in Chinese) 36, 617 (2008).

[12] A. Vedda, F. Moretti, and M. Fasoli, Phys. Rev. B 80, 045104 (2009).

[13] H. Xiao, H. Chen, F. Xu, C. Jiang, and P. Yang, J. Cryst. Growth 310, 521 (2008).

[14] H. Chen, H. Xiao, F. Xu, C. F. Xu, C. Jiang, and P. Yang, J. Inorganic Materials (in Chinese) 24, 1036 (2009).

[15] H. Chen, Q. Shen, Q. Fang, H. Xiao, S. Wang, Z. Liang, and C. Jiang, J. Synthetic Crystals (in Chinese) 39, 829 (2010).

[16] L. Luo and Y. Wang, J. Quantum Electronics (in Chinese) 25, 166 (2008).

[17] V. Yakovyna, A. Matkovskii, D. Sugak, I. Solskii, and S. Novosad, Radiat. Meas. 38, 403 (2004).

[18] Y. Abraham, N. A. W. Holzwarth, and R. T. Williams, Phys. Rev. B 62, 1733 (2000).

[19] K. Tanaka, K. Ohga, C.-K. Choo, and R. Nakata, J. Appl. Phys. 90, 5369 (2001).

[20] Y. Yang, J. Xu, and Y. Hang, Laser & Optoelectronics Progress (in Chinese) 144, 50 (2007).

[21] M.Y. Sharonov, A. B. Bykov, S. Owen, V. Petricevic, and R. R. Alfano, J. Appl. Phys. 93, 1044 (2003).

[22] H. Xia, J. Wang, H. Wang, J .Zhang, Y. Zhang, and H. Song, Rare Metals. (in Chinese) 29, 181 (2005).

[23] W. Kolbe, K. Petermann, and G. Huber, IEEE J. Quantum Electron. 21, 1596 (1985).

Yuntao Wan, Haoyang Hu, Haiping Xia, Yuepin Zhang, Haochuan Jiang1. Growth and optical properties of Cr3+-doped CdWO4 single crystals[J]. Chinese Optics Letters, 2012, 10(4): 042301.

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