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Table 1 The resonant frequency of different orders

From: Mode manipulation and near-THz absorptions in binary grating-graphene layer structures

Order of GSP (N) 1 2 3 4 5 6 7
ω0 (meV) (RCWA) 11.9 16.7 20.5 23.7 26.3 28.9 31.1
ω1 (meV) (theoretical) 11.70 16.61 20.38 23.55 26.34 28.86 31.18
  1. ω0 was the numerical results obtained by RCWA. ω1 was the theoretical results from Equation 10.