Ultra-Broadband Optical Gain in III-Nitride Digital Alloys

作者：Sun Wei^*; Tan Chee Keong; Wierer Jonathan J Jr; Tansu Nelson^*

来源：Scientific Reports, 2018, 8(1): 3109.

DOI：10.1038/s41598-018-21434-6

A novel III-Nitride digital alloy (DA) with ultra-broadband optical gain is proposed. Numerical analysis shows a 50-period InN/GaN DA yields minibands that are densely quantized by numerous confined states. Interband transitions between the conduction and valence minibands create ultra-broadband optical gain spectra with bandwidths up to similar to 1 mu m that can be tuned from the red to infrared. In addition, the ultra-broadband optical gain, bandwidth, and spectral coverage of the III-Nitride DA is very sensitive to layer thickness and other structural design parameters. This study shows the promising potential of the III-Nitride DAs with tunable ultra-broadband interband optical gain for use in semiconductor optical amplifiers and future III-Nitride photonic integration applications.

• 出版日期2018-2-15