We integrate monolayer MoSe2 with a plasmonic nanocircuit and demonstrate the coherent selective routing of the enhanced nonlinear optical signal emitted by the 2D semiconductor, with routing extinction ratios up to 14.86 dB.
Anand wins Best Poster Award at OPTIC 2022.
We experimentally demonstrate the first plasmonic half-subtractor and demultiplexer circuits based on transmission-lines. Empowered by the unique polarization selectivity in the surface plasmon modal behaviors, both circuits are realized without cascading. The operations of the half-subtractor and demultiplexer can be performed using a single laser beam with three predefined linear polarizations. All of our experiments are performed using a 56 fs laser providing greater than 12.5 THz optical bandwidth.
We present the first ultrafast microscopy imaging study of a plasmonic spin skyrmion generated by the spin–orbit interaction of light. We reveal by experiment and theory the nanofemto plasmonic vortex fields and their topological skyrmion spin textures that can dress topologically trivial materials, drive magnetoelectric phenomena, and probe axion physics.
By ultrafast time-resolved PEEM macroscopic imaging, we record a lattice of topological plasmonic spin textures resembling a lattice of magnetic meron quasiparticles in a nano-patterned metallic square coupling structure. The robustness of the spin angular momentum texture over the excitation pulse duration is demonstrated by extracting deep subwavelength resolution images of linear polarization singularity distributions that define the meron domain boundaries.
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