Abstract
The Bloch nature of surface plasmon polaritons in a one-dimensional plasmonic crystal is directly observed using ultrafast and phase-sensitive near-field microscopy. Individual Bloch harmonics within one Bloch mode are separated and visualized. Different harmonics within the same Bloch mode turn out to have a different lateral amplitude distribution. The coupling between the different Bloch harmonics and a near-field probe is studied by comparing the measured energy distribution over the different harmonics to the theoretically expected distribution. It is found that higher order harmonics couple more efficiently to the probe than lower order harmonics.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call