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

Figure 4

The electric field distribution of FFW (a) 𝐸_𝑥⁽¹⁾ and (b) 𝐸_𝑦⁽¹⁾, and electric field distribution of SHG (c) 𝐸_𝑥⁽²⁾ and (d) 𝐸_𝑦⁽²⁾ at wavelengths 630 nm and 315 nm, respectively.

(a) 𝐸_𝑥⁽¹⁾, 630 nm

(b) 𝐸_𝑦⁽¹⁾, 630 nm

(c) 𝐸_𝑥⁽²⁾, 315 nm

(d) 𝐸_𝑦⁽²⁾, 315 nm