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