S-Space College of Natural Sciences (자연과학대학) Dept. of Physics and Astronomy (물리·천문학부) Physics (물리학전공) Journal Papers (저널논문_물리학전공)
Random laser action in ZnO nanorod arrays embedded in ZnO epilayers
- Yu, S. F.; Yuen, Clement; Lau, S. P.; Park, Won Il; Yi, Gyu-Chul
- Issue Date
- American Institute of Physics
- Appl. Phys. Lett. 84, 3241 (2004)
- Random laser action with coherent feedback has been observed in ZnO nanorod arrays embedded in ZnO epilayers. The sample was fabricated by depositing a MgO buffer layer and followed by a layer of ZnO thin film onto a vertically well-aligned ZnO nanorod arrays grown on sapphire substrate. Under 355 nm optical excitation at room temperature, sharp lasing peaks emit at around 390 nm with a linewidth less than 0.4 nm has been observed in all directions. In addition, the dependence of the lasing threshold intensity on the excitation area is shown in good agreement with the random laser theory. Hence, it is demonstrated that random laser action can also be supported in ZnO nanorod arrays. (C) 2004 American Institute of Physics.
- 0003-6951 (print)