556 citations · 1.4k across the 43 of their papers we have counts for
4 papers · 2 filters
Valley vortex states and degeneracy lifting via photonic higher-band excitation
Daohong Song, Daniel Leykam, Jing Su +7
We demonstrate valley-dependent vortex generation in a photonic graphene. Without breaking the inversion symmetry, excitation of two equivalent valleys leads to formation of an opt…
Observation of microscale nonparaxial optical bottle beams
Raluca-Sorina Penciu, Yujie Qiu, Michael Goutsoulas +5
We predict and experimentally observe three-dimensional microscale nonparaxial optical bottle beams based on the generation of a caustic surface under revolution. Such bottle beams…
Independent amplitude and trajectory/beam-width control of nonparaxial beams
Michael Goutsoulas, Raluca-Sorina Penciu, Nikolaos K. Efremidis
We show that it is possible to generate non-paraxial optical beams with pre-engineered trajectories and designed maximum amplitude along these trajectories. The independent control…
Precise amplitude, trajectory, and beam-width control of accelerating and abruptly autofocusing beams
Michael Goutsoulas, Nikolaos K. Efremidis
We show that it is possible to independently control both the trajectory and the maximum amplitude along the trajectory of a paraxial accelerating beam. This is accomplished by car…