Study of the optical properties of AlGaN/GaN separate confinement heterostructures for low-threshold e-beam pumped UV lasers
On demand | Presented live 26 January 2022
In this work, we study the internal quantum efficiency and the lasing threshold of AlGaN/GaN heterostructures designed for UV laser emission. We discuss the effect of carrier diffusion and carrier localization in the optical properties at low and room temperature. The implementation of a graded-index separate confinement heterostructure results in enhanced carrier collection, reducing the lasing threshold. However, this improvement is not correlated with the internal quantum efficiency of the samples.
Sergi Cuesta Arcos
BSc in Engineering Physics at Universitat Politecnica de Catalunya - BarcelonaTech. MSc in Nanosciences and nanotechnologies at Université Grenoble Alpes. Currently working on his PhD at CEA Grenoble in the development of e-beam pumped AlGaN-based UV lasers.
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