کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1669081 | 1008879 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical properties of rare-earth doped epitaxial Sr0.5Ba0.5Nb2O6 thin films grown by pulsed laser deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Optical quality rare-earth (RE) (Nd3+, Eu3+, Gd3+ and Yb3+) doped Sr0.5Ba0.5Nb2O6 (SBN) epitaxial films of ~Â 170Â nm thick have been successfully grown on MgO (100) single crystal substrates using pulsed laser deposition technique. Strong residual stress in these films has been revealed by Raman spectroscopic studies. Two kinds of in-plane orientations with respect to the MgO substrate co-exist. All the film samples show high transparency in the visible wavelength. Their band-gap energies appear to be independent of the types of dopant. Photoluminescence (PL) spectra of RE-doped SBN ceramics show a strong and broad emission band at around 600Â nm (2.07Â eV). The peak position of this emission band changes slightly with different RE-dopants. Thin film samples, however, yield a broad PL band at around 385Â nm (3.22Â eV). This UV emission shows no observable shift in the peak position for different dopants. Apart from these broad emission bands, conspicuous emission lines from Eu3+ and Nd3+ ions are also noted. The origins of these PL spectra are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 519, Issue 1, 29 October 2010, Pages 52-57
Journal: Thin Solid Films - Volume 519, Issue 1, 29 October 2010, Pages 52-57
نویسندگان
Y.B. Yao, W.C. Liu, C.L. Mak, K.H. Wong, H.L. Tam, K.W. Cheah,