Second-Order Nonlinearity in Triangular Lattice Perforated Gold Film due to Surface Plasmas Resonance

Figure 5

(a) The FTS for 𝐸_𝑦⁽¹⁾ component of fundamental frequency wave at the wavelength 1548 nm. The FTS for (b) 𝐸_𝑥⁽²⁾ and (c) 𝐸_𝑦⁽²⁾ component of second-harmonic generation at the wavelength 774 nm.

(a)

(b)

(c)