Near-field characterization of a Bloch-surface-wave-based 2D disk resonator.
We present, to the best of our knowledge, the first experimental investigation of a two-dimensional disk resonator on a dielectric multilayer platform sustaining Bloch surface waves. The disk resonator has been patterned into a few tens of nanometer thin (∼λ/25) titanium dioxide layer deposited on the top of the platform. We characterize the disk resonator by multi-heterodyne scanning near-field optical microscopy. The low loss characteristics of Bloch surface waves allowed us to reach a measured quality factor of 2×103for a disk radius of 100 μm.
R
R
Dubey
B
B
Vosoughi Lahijani
E
E
Barakat
M
M
Häyrinen
M
M
Roussey
M
M
Kuittinen
H P
HP
Herzig