Interaction of sub-terahertz radiation with low-doped grating-based AlGaN/GaN plasmonic structures. Time-domain spectroscopy measurements and electrodynamic modeling. - Korotyeyev, V. V.; Lyaschuk, Yu. M.; Kochelap, V. A.; Varani, L.; Coquillat, D.; Danylyuk, S.; Brose, S.; Vitusevich, S. A. (Semiconductor Physics, Quantum Electronics & Optoelectronics, 2019)