Artikel: Propagation-Invariant Space-Time Plasmonic Pulse in Subwavelength MIM Waveguide.
Nanomaterials (Basel, Switzerland)
2024 Band 14, Heft 5
Abstract: The metal-insulator-metal (MIM) plasmonic waveguide has been highly anticipated for confining and guiding surface plasmon polaritons (SPPs) on the subwavelength scale. However, perennial drawbacks such as a short propagation length and an unbounded ... ...
Abstract | The metal-insulator-metal (MIM) plasmonic waveguide has been highly anticipated for confining and guiding surface plasmon polaritons (SPPs) on the subwavelength scale. However, perennial drawbacks such as a short propagation length and an unbounded transverse field have set limits on the use of the MIM waveguide in various applications. Herein, diffraction- and dispersion-free MIM modes are synthesized by using space-time wave packets (STWPs) and are therefore referred to as space-time MIM (ST-MIM) waveguide modes. Compared to a Gaussian pulse of the same duration and spectral bandwidth, the ST-MIM demonstrates enhanced propagation lengths of about 2.4 times for the symmetric mode and about 6.3 times for the antisymmetric mode. In the simulations, the ST-MIMs are confined in all transverse dimensions, thereby overriding the diffraction limits. In addition, the group velocities of the ST-MIMs can be arbitrarily designed, which makes it possible to synchronize the pulse propagation speeds of the symmetric and antisymmetric MIM modes. |
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Sprache | Englisch |
Erscheinungsdatum | 2024-02-26 |
Erscheinungsland | Switzerland |
Dokumenttyp | Journal Article |
ZDB-ID | 2662255-5 |
ISSN | 2079-4991 |
ISSN | 2079-4991 |
DOI | 10.3390/nano14050425 |
Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
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