S. Lepeshov, A. Gorodetsky, A. Krasnok, E. Rafailov, and P. Belov, Enhancement of Terahertz Photoconductive Antenna Operation by Optical Nanoantennas, Laser Photonics Rev. 11, 1600199 (2017)
Photoconductive antennas are promising sources of widely used terahertz radiation for spectroscopy, imaging, and detection. Recent advancements in nanophotonics have improved their energy conversion efficiency, using optical nanoantennas to enhance absorption, reduce carrier lifetime, and improve thermal efficiency. This Review summarizes key findings, compares implementation approaches, and explores future prospects, including the use of all-dielectric nanoantennas.