کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1497127 | 992987 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lasing threshold dependence on excitation pulse duration in ZnO tetrapods
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
The dependence of the stimulated emission from ZnO tetrapods on the excitation pulse duration was studied. In all cases, clear lasing modes with a width of 0.5–0.8 nm were observed. However, lasing thresholds were significantly different. The thresholds observed were 57 μJ/cm2, 840 μJ/cm2, and 4.2 mJ/cm2 for 250 fs, 120 ps, and 6 ns excitation pulses, respectively. The same trends (a decrease of lasing threshold with a decrease of pulse duration) are observed in samples with different tetrapod densities, although the differences become less pronounced in higher tetrapod density samples where lasing from multiple tetrapods can occur.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 31, Issue 1, September 2008, Pages 35–38
Journal: Optical Materials - Volume 31, Issue 1, September 2008, Pages 35–38
نویسندگان
Y.F. Hsu, E.S.P. Leong, W.M. Kwok, Aleksandra B. Djurišić, S.F. Yu, D.L. Phillips, W.K. Chan,