Second-Order Nonlinearity Assisted by Dual Surface Plasmon Resonance Modes in Perforated Gold Film

Figure 6

The electric field distribution of fundamental frequency field and second harmonic field above the gold film region at wavelengths 1295 nm and 648 nm, respectively.

(a) 𝐸_𝑥⁽¹⁾, 1295 nm

(b) 𝐸_𝑦⁽¹⁾, 1295 nm

(c) 𝐸_𝑥⁽²⁾, 648 nm

(d) 𝐸_𝑦⁽²⁾, 648 nm