Massive Klein Tunneling in Topological Photonic Crystals
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866914716978249728 |
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| author | Nakatsugawa, Keiji Hu, Xiao |
| author_facet | Nakatsugawa, Keiji Hu, Xiao |
| contents | Klein's paradox refers to the transmission of a relativistic particle through a high potential barrier. Although it has a simple resolution in terms of particle-to-antiparticle tunneling (Klein tunneling), debates on its physical meaning seem lasting partially due to the lack of direct experimental verification. In this article, we point out that honeycomb-type photonic crystals (PhCs) provide an ideal platform to investigate the nature of Klein tunneling, where the effective Dirac mass can be tuned in a relatively easy way from a positive value (trivial PhC) to a negative value (topological PhC) via a zero-mass case (PhC graphene). Especially, we show that analysis of the transmission between domains with opposite Dirac masses -- a case hardly be treated within the scheme available so far -- sheds new light on the understanding of the Klein tunneling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_16207 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Massive Klein Tunneling in Topological Photonic Crystals Nakatsugawa, Keiji Hu, Xiao Mesoscale and Nanoscale Physics Optics Klein's paradox refers to the transmission of a relativistic particle through a high potential barrier. Although it has a simple resolution in terms of particle-to-antiparticle tunneling (Klein tunneling), debates on its physical meaning seem lasting partially due to the lack of direct experimental verification. In this article, we point out that honeycomb-type photonic crystals (PhCs) provide an ideal platform to investigate the nature of Klein tunneling, where the effective Dirac mass can be tuned in a relatively easy way from a positive value (trivial PhC) to a negative value (topological PhC) via a zero-mass case (PhC graphene). Especially, we show that analysis of the transmission between domains with opposite Dirac masses -- a case hardly be treated within the scheme available so far -- sheds new light on the understanding of the Klein tunneling. |
| title | Massive Klein Tunneling in Topological Photonic Crystals |
| topic | Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2312.16207 |