A. Mohanty, O. P. Acharya, B. Appasani, K. Sooksood, and S. K. Mohapatra, “A THz Metamaterial Absorber with Multiple Polarization: Insensitive, Sensitive, and Tunable”, ECTI-EEC, vol. 19, no. 2, pp. 165–173, Jun. 2021.