Long-Propagating Ghost Phonon Polaritons Enabled by Selective Mode Excitation
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arXiv
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| Format: | Preprint |
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2024
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| author | Suriyage, Manuka P. Zhou, Qingyi Qin, Hao Sun, Xueqian Lu, Zhuoyuan Maier, Stefan A. Yu, Zongfu Lu, Yuerui |
| author_facet | Suriyage, Manuka P. Zhou, Qingyi Qin, Hao Sun, Xueqian Lu, Zhuoyuan Maier, Stefan A. Yu, Zongfu Lu, Yuerui |
| contents | The precise control of phonon polaritons(PhPs) is essential for advancements in nanophotonic applications like on-chip optical communication and quantum information processing. Ghost hyperbolic phonon polaritons (g-HPs), which have been recently discovered, feature in-plane hyperbolic dispersion and oblique wavefronts, enabling long-range propagation. Despite their potential, controlling the directionality and selective excitation of g-HPs remains challenging. Our research demonstrates that modifying the shape of the launching micro/nano antenna can achieve this control. Using an asymmetric triangular gold antenna on a calcite crystal surface, we achieve highly directional g-HP excitation by selectively targeting specific polariton modes. Additionally, the mode of g-HPs can be adjusted by changing the excitation wavelength or rotating the antenna. Remarkably, our near-field imaging experiments show g-HP propagation over distances exceeding 35 micrometers, more than twice the length reported in previous studies. This work merges g-HP theory with structural engineering, enhancing the control over g-HPs and paving the way for innovative applications in mid-IR optoelectronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_12497 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Long-Propagating Ghost Phonon Polaritons Enabled by Selective Mode Excitation Suriyage, Manuka P. Zhou, Qingyi Qin, Hao Sun, Xueqian Lu, Zhuoyuan Maier, Stefan A. Yu, Zongfu Lu, Yuerui Optics The precise control of phonon polaritons(PhPs) is essential for advancements in nanophotonic applications like on-chip optical communication and quantum information processing. Ghost hyperbolic phonon polaritons (g-HPs), which have been recently discovered, feature in-plane hyperbolic dispersion and oblique wavefronts, enabling long-range propagation. Despite their potential, controlling the directionality and selective excitation of g-HPs remains challenging. Our research demonstrates that modifying the shape of the launching micro/nano antenna can achieve this control. Using an asymmetric triangular gold antenna on a calcite crystal surface, we achieve highly directional g-HP excitation by selectively targeting specific polariton modes. Additionally, the mode of g-HPs can be adjusted by changing the excitation wavelength or rotating the antenna. Remarkably, our near-field imaging experiments show g-HP propagation over distances exceeding 35 micrometers, more than twice the length reported in previous studies. This work merges g-HP theory with structural engineering, enhancing the control over g-HPs and paving the way for innovative applications in mid-IR optoelectronics. |
| title | Long-Propagating Ghost Phonon Polaritons Enabled by Selective Mode Excitation |
| topic | Optics |
| url | https://arxiv.org/abs/2408.12497 |