## Table 1 |
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The resonant frequency of different orders |
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Order of GSP (N) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
… |

ω_{0} (meV) (RCWA) |
11.9 | 16.7 | 20.5 | 23.7 | 26.3 | 28.9 | 31.1 | … |

ω_{1 }(meV) (theoretical) |
11.70 | 16.61 | 20.38 | 23.55 | 26.34 | 28.86 | 31.18 | … |

*ω*_{0} was the numerical results obtained by RCWA. *ω*_{1} was the theoretical results from Equation 10.

Yuan * et al.*

Yuan * et al.* *Nanoscale Research Letters* 2014 **9**:90 doi:10.1186/1556-276X-9-90