Observation of supersymmetric pseudo-Landau levels in strained microwave graphene

• 作者: Matthieu Bellec Charles Poli Ulrich Kuhl Fabrice Mortessagne Henning Schomerus
• 来源期刊: 光：科学与应用（英文版）
• 年，卷（期）: 2020,（5）
• 所属期刊栏目: Original Articles
• 页码范围: 1410-1416
• 页数: 7页
• 语种: 英文

摘要

Using an array of coupled microwave resonators arranged in a deformed honeycomb lattice, we experimentally observe the formation of pseudo-Landau levels in the whole crossover from vanishing to large pseudomagnetic field strengths. This result is achieved by utilising an adaptable setup in a geometry that is compatible with the pseudo-Landau levels at all field strengths. The adopted approach enables us to observe the fully formed flat-band pseudo-Landau levels spectrally as sharp peaks in the photonic density of states and image the associated wavefunctions spatially, where we provide clear evidence for a characteristic nodal structure reflecting the previously elusivesupersymmetry in the underlying low-energy theory. In particular, we resolve the full sublattice polarisation of the anomalous 0th pseudo-Landau level, which reveals a deep connection to zigzag edge states in the unstrained case.