학술논문
Effects of hydrogen dissociation in semi-insulating gallium nitride under UV irradiation on terahertz emission properties
Document Type
Conference
Source
2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) Infrared, Millimeter and Terahertz Waves (IRMMW-THz),2022 47th International Conference on. :1-2 Aug, 2022
Subject
Language
ISSN
2162-2035
Abstract
We report the terahertz (THz) emission spectroscopy (TES) and photoluminescence (PL) spectroscopy results for a semi-insulating (SI) GaN film in comparison with those for unintentionally-doped (UID) and magnesium (Mg)-doped ones. The THz emission polarity showed their band bending near the surface. In addition, the TES and PL results showed intensity changings over time for SI, UID-GaN, but not for Mg-doped GaN. The origin of these effects was studied by observing the THz emission property in the air and vacuum and attributed to the UV- induced hydrogen dissociation.