Second harmonic generation of metal nanoparticles under tightly focused illumination
Sun Jing-Wei1, Wang Xiang-Hui1, †, 
, Chang Sheng-Jiang1, Zeng Ming2, Zhang Na1
, Chang Sheng-Jiang1, Zeng Ming2, Zhang Na1 Near-field distributions of SH field of gold particle illuminated by (a) PW and (b) focused field.
