Title :
Influence of Surface Roughness on the Lasing Performance of Highly Disordered ZnO Films
Author :
Abiyasa, A.P. ; Yu, S.F. ; Yuen, Clement ; Lau, S.P.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ.
Abstract :
The influence of surface roughness on the lasing performance of highly disordered ZnO films is studied. It is found that the highly disordered ZnO films with improvement in surface quality by ion-beam milling can significantly reduce the corresponding scattering loss as well as increase the slope efficiency of the light-light curves even with the presence of MgO cladding layer. Furthermore, it is noted that random lasing action is less dependent on the surface roughness of the ZnO films
Keywords :
II-VI semiconductors; ion beam applications; milling; optical films; random processes; semiconductor lasers; semiconductor thin films; surface roughness; wide band gap semiconductors; zinc compounds; ZnO; highly disordered ZnO films; ion-beam milling; random lasing; scattering loss; slope efficiency; surface roughness; Light scattering; Milling; Optical films; Optical filters; Optical scattering; Rough surfaces; Semiconductor films; Semiconductor lasers; Surface roughness; Zinc oxide; Random lasing; ultraviolet emission; zinc oxide;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.885616
