Influence of Geometrical Parameters on the Optical Activity of Chiral Gold Nanorods

Chiral metal nanoparticles (NPs) offer a powerful means of inducing and harnessing optical activity. However, due to the incomplete knowledge underlying growth mechanisms, there is still limited control over achievable morphological detail and, consequently, resulting Therefore, theoretical modeling needed guide experimental development toward optimizing plasmonic chiroptical response. Toward filling this gap, herein an extensive parametric analysis presented, via computer-aided-design (CAD) models full-wave electrodynamic simulations, which aims at systematically analyzing influence structural changes on circular dichroism (CD) spectra rod-shaped gold NPs comprising helical indentations achiral nanorod cores. From analysis, interesting patterns in plasmon-mediated resonant behavior are identified cause–effect relationships drawn that may serve as go-to recipe for understanding fabrication these their applications, such spectroscopic (bio)detection including CD spectral shifts surface-enhanced Raman