Loss vs Magnetization Threshold Phenomenon for Lorentz Nonreciprocity Induced by a Gyrotropic Particle Inside a Cavity
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| Format: | Preprint |
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2024
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| _version_ | 1866909367950901248 |
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| author | Sadzi, Koffi-Emmanuel Hadad, Yakir |
| author_facet | Sadzi, Koffi-Emmanuel Hadad, Yakir |
| contents | When a plasmonic particle is subject to a static magnetic field, ${B}_{\rm dc}=B_{0} \hat{z}$, its gyrotropic response gives rise to nonreciprocal dynamics of the entire ambient surroundings. This dynamics depends on the particle's excitation which in turn depends on the gyrotropic material damping rate $Γ$. Thus intuitively speaking, the heavier the gyrotropic material loss, the weaker the non-reciprocal response. This is indeed the case when the particle is located in free space. In this letter, we quantify nonreciprocity using the defined measure $\cal{R}$ and show that when the gyrotropic particle is placed inside a cavity, the nonreciprocity measure $\cal{R}$ is robust against material loss up to a certain loss threshold, $Γ_{th}$ that depends on the magnetic biasing $B_0$ |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_20871 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Loss vs Magnetization Threshold Phenomenon for Lorentz Nonreciprocity Induced by a Gyrotropic Particle Inside a Cavity Sadzi, Koffi-Emmanuel Hadad, Yakir Applied Physics When a plasmonic particle is subject to a static magnetic field, ${B}_{\rm dc}=B_{0} \hat{z}$, its gyrotropic response gives rise to nonreciprocal dynamics of the entire ambient surroundings. This dynamics depends on the particle's excitation which in turn depends on the gyrotropic material damping rate $Γ$. Thus intuitively speaking, the heavier the gyrotropic material loss, the weaker the non-reciprocal response. This is indeed the case when the particle is located in free space. In this letter, we quantify nonreciprocity using the defined measure $\cal{R}$ and show that when the gyrotropic particle is placed inside a cavity, the nonreciprocity measure $\cal{R}$ is robust against material loss up to a certain loss threshold, $Γ_{th}$ that depends on the magnetic biasing $B_0$ |
| title | Loss vs Magnetization Threshold Phenomenon for Lorentz Nonreciprocity Induced by a Gyrotropic Particle Inside a Cavity |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2410.20871 |