Fig. 2: Polariton characterisation.
From: Artificial gauge fields and dimensions in a polariton hofstadter ladder
a Anti-crossing of exciton-polariton eigenstates (upper (blue), middle (red) and lower polariton (black)) as a function of cavity length, \({L}_{{{{\rm{c}}}}}=\pi \cdot {k}_{{{{\rm{z}}}}}^{-1}\), measured via white-light reflection on a planar region of the microcavity. b Excitation-power-dependent characterisation of the lasing mode under continuous-wave excitation. The non-linear increase of output power, linewidth narrowing, and blueshift exhibit typical polariton lasing behaviour. c Energy splitting of the fundamental mode in elliptical micropillars for varying ellipticities and sizes. The fundamental mode energy is inversely proportional to the square of the ellipse semi-axes.
