Single and double mode random lasing were observed in a polycrystalline ZnO nanorod array. The double mode random lasing showed mode competition when the mode spacing was 2.3 nm or below. Structurally, X-ray diffraction measurements confirmed the formation of the polycrystalline phase, and photoluminescence measurements revealed a broad visible peak due to point defects, suggesting enhanced oxygen diffusion due to annealing. Our results suggest polycrystalline nanorods prepared by chemical bath deposition as a material system for obtaining random lasing for optoelectronic applications and devices.
|Original language||English (US)|
|Journal||Journal of Applied Physics|
|State||Published - Mar 28 2019|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors are grateful for partial funding from a USM short-term grant (No. 304/PFIZIK/6312155) and from the Global Challenges Research Fund (GCRF)—EPSRC Institutional Sponsorship. W. Maryam also acknowledges Professor Azlan Abdul Aziz for in-kind contribution of the sputtering target. The authors would like to thank Professor Dr. Boon S. Ooi from King Abdullah University of Science and Technology (KAUST) for giving the opportunity to perform the random-lasing measurements in his laboratory (Photonics Laboratory).