Thursday, February 23, 2017 - 9:00pm

In recent advancement of nonlinear plasmonics and metamaterials, significant near-field enhancement by localized surface plasmon resonance (LSPR) of noble metal nanostructure array plays a key role. It is important to better understand the fundamental relationship between LSPR and the induced nonlinear polarization. In this talk, we will discuss the second-order nonlinear optical properties of plasmonic gold nanocrescent array whose LSPR can be selectively excited by tuning the wavelength and polarization of incident electric field. Experimental results of wavelength dependent second harmonic (SH) spectroscopy for two different nanocrescent arrays exhibit a correlation between the spectral profile and the plasmon resonances at SH wavelength. The experimental results will be compared with FDTD calculations.

Speaker: 

Hiroaki Maekawa

Institution: 

UCI (Ge group)

Location: 

NS2 2201