Fig. 2: Experimental demonstration of a band gap opening as the difference between the long (al) and short (as) separation is increased.
From: Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases
Experimental dispersion (a–f) and corresponding real-space intensity distribution (g–l) of the PL from chains of eight polariton condensates with alternating separation distances where al ≈ 10.4 μm and a, g as ≈ 10.4 μm, b, h as ≈ 9.0 μm, c, i as ≈ 8.9 μm, d, j as ≈ 8.7 μm, and e, k as ≈ 8.5 μm. f, l shows the PL dispersion and real-space intensity distribution, respectively, for a chain of 12 condensates with al ≈ 10.2 μm and as ≈ 9.2 μm. The horizontal bars in the bottom right corner of each real-space distribution correspond to 15 μm and the red arrows indicate the gap opening in the dominantly occupied band. a–e are plotted using the logarithmic colour scales shown in e and g–k are plotted using the logarithmic colour scale shown in k.
