Observation of bulk Fermi arc and polarization half charge from paired exceptional points
The ideas of topology have found tremendous success in closed physical systems, but even richer properties exist in the more general open or dissipative framework. We theoretically propose and experimentally demonstrate a bulk Fermi arc that develops from non-Hermitian radiative losses in an open sy...
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| Format: | Article |
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American Association for the Advancement of Science (AAAS)
2018
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| Online Access: | http://hdl.handle.net/1721.1/113662 https://orcid.org/0000-0002-8803-1017 https://orcid.org/0000-0002-7244-3682 https://orcid.org/0000-0002-7184-5831 https://orcid.org/0000-0002-7572-4594 |
| _version_ | 1811083892984119296 |
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| author | Yoon, Yoseob Hsu, Chia Wei Nelson, Keith A. Zhou, Hengyun Peng, Chao Fu, Liang Joannopoulos, John Soljacic, Marin Zhen, Bo |
| author2 | Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies |
| author_facet | Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Yoon, Yoseob Hsu, Chia Wei Nelson, Keith A. Zhou, Hengyun Peng, Chao Fu, Liang Joannopoulos, John Soljacic, Marin Zhen, Bo |
| author_sort | Yoon, Yoseob |
| collection | MIT |
| description | The ideas of topology have found tremendous success in closed physical systems, but even richer properties exist in the more general open or dissipative framework. We theoretically propose and experimentally demonstrate a bulk Fermi arc that develops from non-Hermitian radiative losses in an open system of photonic crystal slabs. Moreover, we discover half-integer topological charges in the polarization of far-field radiation around the bulk Fermi arc. Both phenomena are shown to be direct consequences of the non-Hermitian topological properties of exceptional points, where resonances coincide in their frequencies and linewidths. Our work connects the fields of topological photonics, non-Hermitian physics and singular optics, providing a framework to explore more complex non-Hermitian topological systems. |
| first_indexed | 2024-09-23T12:41:17Z |
| format | Article |
| id | mit-1721.1/113662 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T12:41:17Z |
| publishDate | 2018 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | dspace |
| spelling | mit-1721.1/1136622022-09-28T09:25:47Z Observation of bulk Fermi arc and polarization half charge from paired exceptional points Yoon, Yoseob Hsu, Chia Wei Nelson, Keith A. Zhou, Hengyun Peng, Chao Fu, Liang Joannopoulos, John Soljacic, Marin Zhen, Bo Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Massachusetts Institute of Technology. Department of Physics Zhou, Hengyun Peng, Chao Fu, Liang Joannopoulos, John Soljacic, Marin Zhen, Bo The ideas of topology have found tremendous success in closed physical systems, but even richer properties exist in the more general open or dissipative framework. We theoretically propose and experimentally demonstrate a bulk Fermi arc that develops from non-Hermitian radiative losses in an open system of photonic crystal slabs. Moreover, we discover half-integer topological charges in the polarization of far-field radiation around the bulk Fermi arc. Both phenomena are shown to be direct consequences of the non-Hermitian topological properties of exceptional points, where resonances coincide in their frequencies and linewidths. Our work connects the fields of topological photonics, non-Hermitian physics and singular optics, providing a framework to explore more complex non-Hermitian topological systems. Massachusetts Institute of Technology. Undergraduate Research Opportunities Program Natural Sciences and Engineering Research Council of Canada (Grant 61575002) Natural Sciences and Engineering Research Council of Canada (Grant 61320106001) China Scholarship Council 2018-02-14T18:55:47Z 2018-02-14T18:55:47Z 2017-12 2017-09 2018-01-31T13:54:03Z Article http://purl.org/eprint/type/JournalArticle 0036-8075 1095-9203 http://hdl.handle.net/1721.1/113662 Zhou, Hengyun, et al. “Observation of Bulk Fermi Arc and Polarization Half Charge from Paired Exceptional Points.” Science, Jan. 2018, p. eaap9859. © 2018 American Association for the Advancement of Science. https://orcid.org/0000-0002-8803-1017 https://orcid.org/0000-0002-7244-3682 https://orcid.org/0000-0002-7184-5831 https://orcid.org/0000-0002-7572-4594 http://dx.doi.org/10.1126/science.aap9859 Science Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Association for the Advancement of Science (AAAS) arXiv |
| spellingShingle | Yoon, Yoseob Hsu, Chia Wei Nelson, Keith A. Zhou, Hengyun Peng, Chao Fu, Liang Joannopoulos, John Soljacic, Marin Zhen, Bo Observation of bulk Fermi arc and polarization half charge from paired exceptional points |
| title | Observation of bulk Fermi arc and polarization half charge from paired exceptional points |
| title_full | Observation of bulk Fermi arc and polarization half charge from paired exceptional points |
| title_fullStr | Observation of bulk Fermi arc and polarization half charge from paired exceptional points |
| title_full_unstemmed | Observation of bulk Fermi arc and polarization half charge from paired exceptional points |
| title_short | Observation of bulk Fermi arc and polarization half charge from paired exceptional points |
| title_sort | observation of bulk fermi arc and polarization half charge from paired exceptional points |
| url | http://hdl.handle.net/1721.1/113662 https://orcid.org/0000-0002-8803-1017 https://orcid.org/0000-0002-7244-3682 https://orcid.org/0000-0002-7184-5831 https://orcid.org/0000-0002-7572-4594 |
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