Georgakilas Ioannis, Mirek Rafał, Urbonas Darius, Forster Michael, Scherf Ullrich, Mahrt Rainer F, Stöferle Thilo
IBM Research Europe - Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
Institute of Quantum Electronics, ETH Zurich, Auguste-Piccard-Hof 1, 8093 Zürich, Switzerland.
Sci Adv. 2025 May 30;11(22):eadt8645. doi: 10.1126/sciadv.adt8645. Epub 2025 May 28.
Exciton-polariton microcavity arrays have emerged as a promising semiconductor-based platform for analog simulations of model Hamiltonians and topological effects. To study a variety of Hamiltonians and investigate their properties, it is essential to have highly configurable and easily engineerable structures with low disorder. Here, we demonstrate in situ tunable, room-temperature polariton condensation in individual states of a Su-Schrieffer-Heeger topological lattice by using an open-cavity configuration with an organic polymer layer. Changing the cavity length in combination with vibron-mediated relaxation in the polymer allows us to achieve selective polariton condensation into different states of the band structure, unveiled by nonlinear emission, linewidth narrowing, energy blue shift, and extended macroscopic coherence. Furthermore, we engineer the bandgap and the edge state localization by adjusting the interaction between adjacent lattice sites. Our results demonstrate the versatility and accuracy of the platform for the investigation of quantum fluids in complex potential landscapes and topological effects at room temperature.
激子极化激元微腔阵列已成为一种有前途的基于半导体的平台，用于对哈密顿量模型和拓扑效应进行模拟。为了研究各种哈密顿量并探究其性质，拥有高度可配置且易于设计、无序度低的结构至关重要。在此，我们通过使用带有有机聚合物层的开放腔配置，在Su-Schrieffer-Heeger拓扑晶格的各个状态中展示了原位可调的室温极化激元凝聚。改变腔长并结合聚合物中声子介导的弛豫，使我们能够实现选择性极化激元凝聚到能带结构的不同状态，这通过非线性发射、线宽变窄、能量蓝移和扩展的宏观相干得以揭示。此外，我们通过调整相邻晶格位点之间的相互作用来设计带隙和边缘态局域化。我们的结果证明了该平台在室温下研究复杂势场中的量子流体和拓扑效应方面的多功能性和准确性。
