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Observation of second order meron polarisation textures in optical microcavities | | M. Król
; H. Sigurdsson
; K. Rechcińska
; P. Oliwa
; K.Tyszka
; W. Bardyszewski
; A. Opala
; M. Matuszewski
; P. Morawiak
; R. Mazur
; W. Piecek
; P. Kula
; P. G. Lagoudakis
; B. Piętka
; J. Szczytko
; | | Date: |
4 Oct 2020 | | Abstract: | Multicomponent Bose-Einstein condensates, quantum Hall systems, and chiral
magnetic materials display twists and knots in the continuous symmetries of
their order parameter, known as Skyrmions. Originally discovered as solutions
to the nonlinear sigma model in quantum field theory, these vectorial
excitations are quantified by a topological winding number dictating their
interactions and global properties of the host system. Here, we report the
first experimental observation of a stable individual second order meron, and
antimeron, appearing in an electromagnetic field. These complex textures are
realised by confining light into a liquid-crystal filled cavity which, through
its anisotropic refractive index, provides an adjustable artificial photonic
gauge field which couples the cavity photons motion to its polarisation
resulting in formation of these fundamental vectorial vortex states of light.
Our observations take a step towards bringing topologically robust
room-temperature optical vector textures into the field of photonic information
processing and storage. | | Source: | arXiv, 2010.01691 | | Services: | Forum | Review | PDF | Favorites | |
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