Experimental observation of Berry phases in optical M&ouml;bius-strip microcavities

Wang Jiawei; Valligatla Sreeramulu; Yin Yin; Schwarz Lukas; Medina-Sanchez Mariana; Baunack Stefan; Lee Ching Hua; Thomale Ronny; Li Shilong; Fomin Vladimir; Ma Libo; Schmidt Oliver

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2023-07-12 03:25

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WANG, Jiawei, VALLIGATLA, Sreeramulu, YIN, Yin, SCHWARZ, Lukas, MEDINA-SANCHEZ, Mariana, BAUNACK, Stefan, LEE, Ching Hua, THOMALE, Ronny, LI, Shilong, FOMIN, Vladimir, MA, Libo, SCHMIDT, Oliver. Experimental observation of Berry phases in optical Möbius-strip microcavities. In: Nature Photonics, 2023, vol. 17, pp. 120-125. ISSN 1749-4885. DOI: https://doi.org/10.1038/s41566-022-01107-7

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Nature Photonics

Volumul 17 / 2023 / ISSN 1749-4885

Experimental observation of Berry phases in optical Möbius-strip microcavities

DOI:https://doi.org/10.1038/s41566-022-01107-7

Pag. 120-125

Wang Jiawei¹²³, Valligatla Sreeramulu², Yin Yin²⁴, Schwarz Lukas², Medina-Sanchez Mariana⁵, Baunack Stefan⁵, Lee Ching Hua⁶, Thomale Ronny⁷, Li Shilong⁸, Fomin Vladimir⁵⁹, Ma Libo², Schmidt Oliver¹¹⁰¹¹

¹ Technische Universität Chemnitz,
² Institute for Integrative Nanosciences,
³ Harbin Institute of Technology,
⁴ Jiangsu University ,
⁵ Institut fuer Integrative Nanowissenschaften, Leibniz-Institut fuer Festkoerper- und Werkstoffforschung Dresden,
⁶ National University of Singapore,
⁷ Universität Würzburg,
⁸ Okinawa Institute of Science and Technology Graduate University,
⁹ Moldova State University,
¹⁰ Chemnitz University of Technology,
¹¹ Technische Universitat Dresden, Dresden

Disponibil în IBN: 31 ianuarie 2023

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Rezumat

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.

Cuvinte-cheie
Berry's phase, Loop structure, Non-trivial, Optical electronics, Optical-, Parameter spaces, Polaritons, Real-space, Spinning particles, Theoretical investigations

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