Abstract
We study the spontaneous formation of exciton polariton vortices in an
all-optical non-resonantly excited annular trap, which is formed by
ring-shaped subpicosecond laser pulses. Since the light emitted by these
vortices carries orbital angular momentum (OAM) corresponding to their
topological charge, we apply a dedicated OAM spectroscopy technique to
detect the OAM of the measurement signal with picosecond time
resolution. This allows us to identify the formation of OAM modes and
investigate the dynamics of the vortex formation process. We also study
the power dependence of this process and how the ring diameter
influences the formation of OAM modes.
Original language | English |
---|---|
Article number | 245309 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 101 |
Issue number | 24 |
DOIs | |
Publication status | Published - 24 Jun 2020 |