Space-time duality in polariton dynamics
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
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| _version_ | 1866911033040306176 |
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| author | Xu, Suheng Kim, Seunghwi Vitalone, Rocco A. Yang, Birui Swann, Josh Renzi, Enrico M. Lin, Yuchen Handa, Taketo Zhu, X. -Y. Hone, James Dean, Cory Cavalleri, Andrea Fogler, M. M. Millis, Andrew J. Alu, Andrea Basov, D. N. |
| author_facet | Xu, Suheng Kim, Seunghwi Vitalone, Rocco A. Yang, Birui Swann, Josh Renzi, Enrico M. Lin, Yuchen Handa, Taketo Zhu, X. -Y. Hone, James Dean, Cory Cavalleri, Andrea Fogler, M. M. Millis, Andrew J. Alu, Andrea Basov, D. N. |
| contents | The spatial and temporal dynamics of wave propagation are intertwined. A common manifestation of this duality emerges in the spatial and temporal decay of waves as they propagate through a lossy medium. A complete description of the non-Hermitian wave dynamics in such a lossy system, capturing temporal and spatial decays, necessitates the use of complex-valued frequency and/or wavenumber Eigen-values. Here, we demonstrate that the propagation of polaritons - hybrid light-matter quasiparticles - can be broadly controlled in space and time by temporally shaping their photonic excitation. Using time-domain terahertz near-field nanoscopy, we study plasmon polaritons in bilayer graphene at sub-picosecond time scales. Suppressed spatial decay of polaritons is implemented by temporally engineering the excitation waveform. Polaritonic space-time metrology data agree with our dynamic model. Through the experimental realization and visualization of polaritonic space-time duality, we uncover the effects of the spatio-temporal engineering of wave dynamics; these are applicable to acoustic, photonic, plasmonic, and electronic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_18224 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Space-time duality in polariton dynamics Xu, Suheng Kim, Seunghwi Vitalone, Rocco A. Yang, Birui Swann, Josh Renzi, Enrico M. Lin, Yuchen Handa, Taketo Zhu, X. -Y. Hone, James Dean, Cory Cavalleri, Andrea Fogler, M. M. Millis, Andrew J. Alu, Andrea Basov, D. N. Optics The spatial and temporal dynamics of wave propagation are intertwined. A common manifestation of this duality emerges in the spatial and temporal decay of waves as they propagate through a lossy medium. A complete description of the non-Hermitian wave dynamics in such a lossy system, capturing temporal and spatial decays, necessitates the use of complex-valued frequency and/or wavenumber Eigen-values. Here, we demonstrate that the propagation of polaritons - hybrid light-matter quasiparticles - can be broadly controlled in space and time by temporally shaping their photonic excitation. Using time-domain terahertz near-field nanoscopy, we study plasmon polaritons in bilayer graphene at sub-picosecond time scales. Suppressed spatial decay of polaritons is implemented by temporally engineering the excitation waveform. Polaritonic space-time metrology data agree with our dynamic model. Through the experimental realization and visualization of polaritonic space-time duality, we uncover the effects of the spatio-temporal engineering of wave dynamics; these are applicable to acoustic, photonic, plasmonic, and electronic systems. |
| title | Space-time duality in polariton dynamics |
| topic | Optics |
| url | https://arxiv.org/abs/2506.18224 |