Analyzing random lasing spectra of the zinc oxide bulk and the multiple quantum wells by empirical mode decomposition and fast Fourier transform

Yung Chi Wu*, Yu Pin Lan, Wei Rein Liu, Ja Hon Lin, Bi Hsuan Lin, Wen Feng Hsieh

*此作品的通信作者

研究成果: Article同行評審

摘要

Empirical mode decomposition (EMD) was used to efficiently distinguish weak random-cavity emission from large broad spontaneous emission of the ZnO bulk and the multiple quantum wells (MQWs) structures. By fast Fourier transforming (FFT) the EMD results, we obtained the optical cavity lengths of random lasing and their corresponding emission intensity. With increasing pumping power, the EMD-FFT method confirms that the nonlinear trend of the random lasing emission in ZnO bulk and the change in optical cavity length is a result of change in refractive index dispersion due to the bandgap renormalization with high excited carrier density in nonpolar a-plane ZnO MQWs.

原文English
文章編號131110
期刊Applied Physics Letters
119
發行號13
DOIs
出版狀態Published - 27 9月 2021

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