Resonance suppression in the extinction spectrum of single and aggregated hemispheres on a reflecting surface

摘要

The extinction spectrum from single and aggregated hemispheres whose flat faces lie on a reflecting surface is calculated, and some of the expected resonances are found to disappear for specific choices of the direction and the polarization of the incident wave. This resonance-suppressing effect is fully explained for the case of single hemispheres, whereas for the case of aggregated hemispheres the guidelines for its explanation are given. (C) 1997 Optical Society of America.