Polarimetric and interferometric measurement of orbital angular momentum imparted by single plasmon nano-antennas
We report an experimental technique for quantitative analysis of amplitude, phase, directivity and polarization of wavefronts scattered by single nano-objects. As a demonstration we quantify the spin and orbital angular momentum imposed by plasmonic spiral nano-antennas.
Röhrich, R, Hoekmeijer, C, Osorio, C.I, & Koenderink, A.F. (2019). Polarimetric and interferometric measurement of orbital angular momentum imparted by single plasmon nano-antennas. In Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP), CTh3A.2. OSA Publishing. doi:10.1364/cosi.2019.cth3a.2