Baboux F, Ge L, Jacqmin T, Biondi M, Galopin E, Lemaître A, Le Gratiet L, Sagnes I, Schmidt S, Türeci H E, Amo A, Bloch J
Laboratoire de Photonique et de Nanostructures (LPN), CNRS, Université Paris-Saclay, route de Nozay, F-91460 Marcoussis, France.
Department of Engineering Science and Physics, College of Staten Island, CUNY, New York 10314, USA.
Phys Rev Lett. 2016 Feb 12;116(6):066402. doi: 10.1103/PhysRevLett.116.066402.
We report on the engineering of a nondispersive (flat) energy band in a geometrically frustrated lattice of micropillar optical cavities. By taking advantage of the non-Hermitian nature of our system, we achieve bosonic condensation of exciton polaritons into the flat band. Because of the infinite effective mass in such a band, the condensate is highly sensitive to disorder and fragments into localized modes reflecting the elementary eigenstates produced by geometric frustration. This realization offers a novel approach to studying coherent phases of light and matter under the controlled interplay of frustration, interactions, and dissipation.
我们报道了在微柱光学腔的几何受挫晶格中实现非色散（平坦）能带的工程方法。通过利用我们系统的非厄米性质，我们实现了激子极化激元在平坦能带中的玻色凝聚。由于该能带中有效质量无穷大，凝聚态对无序高度敏感，并分裂成反映几何受挫产生的基本本征态的局域模式。这一成果为在受挫、相互作用和耗散的可控相互作用下研究光与物质的相干相提供了一种新方法。
