Light scattering at nanoparticles and molecules can be dramatically enhanced in the 'hot spots' of optical antennas, where the incident light is highly concentrated. Although this effect is widely applied in surface-enhanced optical sensing, spectroscopy and microscopy, the underlying electromagnetic mechanism of the signal enhancement is challenging to… (More)
We report on the observation of second order infrared plasmon resonances in lithographically prepared gold nanorods investigated by means of far-field microscopic infrared spectroscopy. In addition to the fundamental antenna-like mode, even and odd higher order resonances are observed under normal incidence of light. The activation of even-order modes under… (More)
We study systems of metal nanoparticles (MNP) coupled with semiconducting quantum dots (SQD). Hybrid behavior can be tailored by the MNP shape and the exciton resonance of SQDs which determine the local fields.