Terahertz surface plasmons propagation in semiconducting parallel plates waveguide configurationRoopkiranpreet Kaur, Maidul Islam, P. C. Agarwal, Sukhdeep Kaur and Gagan KumarEPL, 134 3 (2021) 38002DOI: https://doi.org/10.1209/0295-5075/134/38002