Excitation of highly concentrated spoof surface plasmon polaritons based on LC-resonance theoryAsad Aziz, Arsalan Aziz, Mohammad Mahtab Alam and Ahmed M. GalalEur. Phys. J. Plus, 138 1 (2023) 61DOI: https://doi.org/10.1140/epjp/s13360-023-03668-0