1. Tuning mid-infrared polarization sensitive reflectivity in GaN/AlGaN heterostructures.
- Author
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Bile, Alessandro, Centini, Marco, Ceneda, Daniele, Passaseo, Adriana, Tobaldi, David Maria, Tasco, Vittorianna, Sibilia, Concita, and Larciprete, Maria Cristina
- Subjects
PHYSICS research ,PHYSICAL optics ,OPTICAL polarization ,HETEROSTRUCTURES ,SAPPHIRES - Abstract
We present narrow-band polarization-sensitive reflectance of GaN/AlGaN heterostructures in the mid-infrared range. Experimental measurements performed at 15° angle of incidence show the excitation of a Berreman mode at the interface between GaN and sapphire substrate. A transfer matrix method for anisotropic layers has been used to analyze the obtained results. The contribution of the two-dimensional electron gas at the interfaces of the heterostructures has been included by proper modelization of an effective thin layer. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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