Fig. 5

Matching the fundamental and SH driving fields to Fano (a ~ b) and magnetic field (c ~ d) resonances to enhance the SHG radiation. a Experimental (red) and simulated (blue) scattering spectra of a silver haptamer. The inset shows the SEM image. b SHG intensity comparisons among a dipole antenna (DA), a double resonant antenna (DRA), a haptamer excited at the fundamental wavelengths of 950 nm and 800 nm. Reprinted with permission from Nano Letters 2013, 13, 1847 − 185. Copyright 2013 American Chemical Society. c SEM image of coupled silver nanostrips gratings. d Experimental (solid) and simulated (dashed) transmission spectra for sample 1 and 2. Reprinted with permission from Optical Materials Express 2015, 5(11), 2682–2691. Copyright 2015 Optical Society of American