“…This has unique advantages, such as strong penetrating power, low energy, and good transient performance [ 1 , 2 ], and has broad application prospects in many fields in terms of high-speed wireless communication [ 3 , 4 ], material detection [ 5 ], biomedical research [ 6 , 7 ], and nondestructive evaluation [ 8 ]. In recent years, with the development of technology, breakthroughs have been made in the research of stable broadband terahertz sources [ 9 , 10 ]. Although the research on terahertz devices has received extensive attention, it is difficult for terahertz waves to interact strongly with natural materials, resulting in great resistance to their development [ 11 , 12 ].…”