Near-Field Spin Chern Number Quantized by Real-Space Topology of Optical Structures
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
| Original language | English |
|---|---|
| Article number | 233801 |
| Journal / Publication | Physical Review Letters |
| Volume | 132 |
| Issue number | 23 |
| Online published | 7 Jun 2024 |
| Publication status | Published - 7 Jun 2024 |
Link(s)
| DOI | DOI |
|---|---|
| Attachment(s) | Documents
Publisher's Copyright Statement
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| Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85195265405&origin=recordpage |
| Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(a6279dfa-8f0c-41e1-9497-0676577250db).html |
Abstract
The Chern number has been widely used to describe the topological properties of periodic structures in momentum space. Here, we introduce a real-space spin Chern number for the optical near fields of finite-sized structures. This new spin Chern number is intrinsically quantized and equal to the structure's Euler characteristic. The relationship is robust against continuous deformation of the structure's geometry and is irrelevant to the specific material constituents or external excitation. Our Letter enriches topological physics by extending the Chern number to real space, opening exciting possibilities for exploring the real-space topological properties of light. © 2024 American Physical Society
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Citation Format(s)
In: Physical Review Letters, Vol. 132, No. 23, 233801, 07.06.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
