Electromagnetic Time Interfaces in Wire Media: Innovations for Subwavelength Imaging
Fuente:
arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866915049110503424 |
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| author | Simovski, Constantin Mirmoosa, Mohammad Sajjad Tretyakov, Sergei |
| author_facet | Simovski, Constantin Mirmoosa, Mohammad Sajjad Tretyakov, Sergei |
| contents | In this work, we theoretically study temporal interfaces between media with strong spatial dispersion and dielectrics. In particular, we consider a temporal discontinuity that transforms a wire medium sample, a metamaterial with resonant spatial dispersion, into a uniaxial dielectric. We show that this transition results in a transformation of the deeply subwavelength spatial spectrum of TEM waves propagating in the wire medium at a certain frequency into a spectrum of plane waves at new frequencies that are all higher than the initial one. The waves at different frequencies propagate in different directions. Their complex amplitudes and propagation directions are uniquely related to the amplitudes of the spatial harmonics of the fields which existed before the transition. We explain how to implement this transition. The revealed effect may result in a promising method of subwavelength imaging. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_12075 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electromagnetic Time Interfaces in Wire Media: Innovations for Subwavelength Imaging Simovski, Constantin Mirmoosa, Mohammad Sajjad Tretyakov, Sergei Optics Applied Physics In this work, we theoretically study temporal interfaces between media with strong spatial dispersion and dielectrics. In particular, we consider a temporal discontinuity that transforms a wire medium sample, a metamaterial with resonant spatial dispersion, into a uniaxial dielectric. We show that this transition results in a transformation of the deeply subwavelength spatial spectrum of TEM waves propagating in the wire medium at a certain frequency into a spectrum of plane waves at new frequencies that are all higher than the initial one. The waves at different frequencies propagate in different directions. Their complex amplitudes and propagation directions are uniquely related to the amplitudes of the spatial harmonics of the fields which existed before the transition. We explain how to implement this transition. The revealed effect may result in a promising method of subwavelength imaging. |
| title | Electromagnetic Time Interfaces in Wire Media: Innovations for Subwavelength Imaging |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2411.12075 |