Optical losses in p-type layers of GaN ridge waveguides in the IR region

Ohad Westreich*, Moti Katz, Gil Atar, Yossi Paltiel, Noam Sicron

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Optical losses in c-plane (0001) GaN ridge waveguides, containing Mg-doped layers, were measured at 1064 nm, using the Fabry-Perot method. The losses increase linearly with the modal content of the p-layer, indicating that the absorption in these waveguides is dominated by p-layer absorption. The p-layer absorption is strongly anisotropic with E⊥c losses 4 times higher than E∝c. The absorption is temperature independent between 10 °C and 60 °C, supporting the possibility that it is related to Mg-bound holes.

Original languageAmerican English
Article number022103
JournalApplied Physics Letters
Issue number2
StatePublished - 10 Jul 2017

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