  Artificial spin ice systems have seen burgeoning interest due to their
intriguing physics and potential applications in reprogrammable memory, logic
and magnonics. In-depth comparisons of distinct artificial spin systems are
crucial to advancing the field and vital work has been done on characteristic
behaviours of artificial spin ices arranged on different geometric lattices.
Integration of artificial spin ice with functional magnonics is a relatively
recent research direction, with a host of promising early results. As the field
progresses, studies examining the effects of lattice geometry on the magnonic
response are increasingly significant. While studies have investigated the
effects of different lattice tilings such as square and kagome (honeycomb),
little comparison exists between systems comprising continuously-connected
nanostructures, where spin-waves propagate through the system via exchange
interaction, and systems with nanobars disconnected at vertices where
spin-waves are transferred via stray dipolar-field. Here, we perform a
Brillouin light scattering study of the magnonic response in two kagome
artificial spin ices, a continuously-connected system and a disconnected system
with vertex gaps. We observe distinctly different high-frequency dynamics and
characteristic magnetization reversal regimes between the systems, with key
distinctions in system microstate during reversal, internal field profiles and
spin-wave mode quantization numbers. These observations are pertinent for the
fundamental understanding of artificial spin systems and the design and
engineering of such systems for functional magnonic applications.
