Details

Autor(en) / Beteiligte

• Wang, Jiawei
• Valligatla, Sreeramulu
• Yin, Yin
• Schwarz, Lukas
• Medina-Sánchez, Mariana
• Baunack, Stefan
• Lee, Ching Hua
• Thomale, Ronny
• Li, Shilong
• Fomin, Vladimir M.
• Ma, Libo
• Schmidt, Oliver G.

Titel

Experimental observation of Berry phases in optical Möbius-strip microcavities

Ist Teil von

• Nature photonics, 2023-01, Vol.17 (1), p.120-125

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2023

Quelle

Springer Nature - Connect here FIRST to enable access

Beschreibungen/Notizen

• Abstract The Möbius strip, a fascinating loop structure with one-sided topology, provides a rich playground for manipulating the non-trivial topological behaviour of spinning particles, such as electrons, polaritons and photons, in both real and parameter spaces. For photons resonating in a Möbius-strip cavity, the occurrence of an extra phase—known as the Berry phase—with purely topological origin is expected due to its non-trivial evolution in parameter space. However, despite numerous theoretical investigations, characterizing the optical Berry phase in a Möbius-strip cavity has remained elusive. Here we report the experimental observation of the Berry phase generated in optical Möbius-strip microcavities. In contrast to theoretical predictions in optical, electronic and magnetic Möbius-topology systems where only Berry phase π occurs, we demonstrate that a variable Berry phase smaller than π can be acquired by generating elliptical polarization of resonating light. Möbius-strip microcavities as integrable and Berry-phase-programmable optical systems are of great interest in topological physics and emerging classical or quantum photonic applications.