Dirac-vortex topological cavity
| Autor: | Gao, Xiaomei, Yang, Lechen, Lin, Hao, Zhang, Lang, Li, Jiafang, Bo, Fang, Wang, Zhong, Lu, Ling |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Nature Nanotechnology 15, 1012 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41565-020-0773-7 |
| Popis: | Cavity design is crucial for single-mode semiconductor lasers such as the distributed feedback (DFB) and vertical-cavity surface-emitting lasers (VCSEL). By recognizing that both optical resonators feature a single mid-gap mode localized at the topological defect in a one-dimensional (1D) lattice, we generalize the topological cavity design into 2D using a honeycomb photonic crystal with a vortex Dirac mass -- the analog of Jackiw-Rossi zero modes. We theoretically predict and experimentally demonstrate that such a Dirac-vortex cavity can have a tunable mode area across a few orders of magnitudes, arbitrary mode degeneracy, robustly large free-spectral-range, vector-beam output of low divergence, and compatibility with high-index substrates. This topological cavity could enable photonic crystal surface-emitting lasers (PCSEL) with stabler single-mode operation. Comment: 7 pages, 5 figures. Published version at https://www.nature.com/articles/s41565-020-0773-7 |
| Databáze: | arXiv |
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