Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exciton-polaritons in flatland: Controlling flatband properties in a
  Lieb lattice   In recent years, novel two-dimensional materials such as graphene, bismuthene
and transition-metal dichalcogenides have attracted considerable interest due
to their unique physical properties. A range of physical effects can be
transferred to the realms of photonics by creating artificial photonic lattices
emulating these two-dimensional materials. Here, exciton-polaritons in
semiconductor microcavities offer an exciting opportunity to study a
part-light, part-matter quantum fluid of light in a complex lattice potential.
In this paper, we study exciton-polaritons in a two-dimensional Lieb lattice of
buried optical traps. The $S$ and $P_{xy}$ photonic orbitals of such a Lieb
lattice give rise to the formation of two flatbands which are of greatest
interest for the distortion-free storage of compact localized states. By using
a well controlled etch-and-overgrowth technique, we manage to control the
trapping as well as the site couplings with great precision. This allows us to
spectroscopically monitor the flatness of the flatbands across the full
Brillouin zone. Furthermore, we demonstrate experimentally that these flatbands
can be directly populated by condensation under non-resonant laser excitation.
Finally, using this advanced device approach we demonstrate resonant and
deterministic excitation of flatband modes in transmission geometry. Our
findings establish the exciton-polariton systems as a highly controllable,
optical many-body system to study flatband effects and for distortion-free
storage of compact localized states.

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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio