Near-field nano-spectroscopy of strong mode coupling in phonon-polaritonic crystals
Near-field nano-spectroscopy of strong mode coupling in phonon-polaritonic crystals
Strongly coupled phonon polaritons in patterned polar dielectric nano-resonators give rise to the formation of hybridized energy states with intriguing properties. However, direct observation of mode coupling in these periodic nanostructures is still challenging for momentum-matching-required far-field spectroscopies. Here, we explore the near-field response of strong coupling between propagating and localized polariton modes sustained in SiC phonon polaritonic crystals (PhPCs) to reveal the evolution of Rabi splittings with the change of lattice constant in the near-field perspective. The near-field nano-spectra of PhPCs show distinct Rabi splitting near the forbidden bands of ∼16 cm−1 in the band structures. In particular, an exotic three-polariton-coupling effect is observed with three splitting peaks in the nano-spectra induced by the interaction between local monopolar modes in nano-pillars and zone-folded phonon polaritons. Furthermore, sharp dips indicating weak near-field scatterings appear in nano-spectra at the intrinsic frequencies of the monopolar modes with strong local-field enhancement, which are estimated to be bright scattering peaks intuitively. These results would inspire the dispersion engineering and characterization of coupled phononic nano-resonators for diverse nanophotonic applications.
Hu, Xin
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Lo, Tsz Wing
4c46212a-5385-4173-9783-80249452738d
Mancini, Andrea
17b367f1-e0e8-49f1-9298-9540725e182f
Gubbin, Christopher
09b75073-7a9a-4443-9a84-1458ec2535e9
Martini, Francesco
394af6a7-dbcf-4d7b-9add-f7ed80bfe020
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Zhang, Jian
a63c1b0a-6207-4dea-b5a2-bdbcd5c2024f
Gong, Zhongmiao
31d99702-9995-4890-9d16-457081641189
Zhang, Xuefeng
48157c1b-78d1-4e83-ba25-aa766b8bd314
Lei, Dangyuan
1e6082c6-9f76-40da-ac67-f387143ef0b8
Maier, Stefan A.
950db919-e145-48b5-bd73-196de02e46fe
1 June 2022
Hu, Xin
564a1568-c3f6-4779-bb87-7e47bbb930da
Lo, Tsz Wing
4c46212a-5385-4173-9783-80249452738d
Mancini, Andrea
17b367f1-e0e8-49f1-9298-9540725e182f
Gubbin, Christopher
09b75073-7a9a-4443-9a84-1458ec2535e9
Martini, Francesco
394af6a7-dbcf-4d7b-9add-f7ed80bfe020
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Zhang, Jian
a63c1b0a-6207-4dea-b5a2-bdbcd5c2024f
Gong, Zhongmiao
31d99702-9995-4890-9d16-457081641189
Zhang, Xuefeng
48157c1b-78d1-4e83-ba25-aa766b8bd314
Lei, Dangyuan
1e6082c6-9f76-40da-ac67-f387143ef0b8
Maier, Stefan A.
950db919-e145-48b5-bd73-196de02e46fe
Hu, Xin, Lo, Tsz Wing, Mancini, Andrea, Gubbin, Christopher, Martini, Francesco, Politi, Alberto, De Liberato, Simone, Zhang, Jian, Gong, Zhongmiao, Zhang, Xuefeng, Lei, Dangyuan and Maier, Stefan A.
(2022)
Near-field nano-spectroscopy of strong mode coupling in phonon-polaritonic crystals.
Applied Physics Reviews, 9 (2), [021414].
(doi:10.1063/5.0087489).
Abstract
Strongly coupled phonon polaritons in patterned polar dielectric nano-resonators give rise to the formation of hybridized energy states with intriguing properties. However, direct observation of mode coupling in these periodic nanostructures is still challenging for momentum-matching-required far-field spectroscopies. Here, we explore the near-field response of strong coupling between propagating and localized polariton modes sustained in SiC phonon polaritonic crystals (PhPCs) to reveal the evolution of Rabi splittings with the change of lattice constant in the near-field perspective. The near-field nano-spectra of PhPCs show distinct Rabi splitting near the forbidden bands of ∼16 cm−1 in the band structures. In particular, an exotic three-polariton-coupling effect is observed with three splitting peaks in the nano-spectra induced by the interaction between local monopolar modes in nano-pillars and zone-folded phonon polaritons. Furthermore, sharp dips indicating weak near-field scatterings appear in nano-spectra at the intrinsic frequencies of the monopolar modes with strong local-field enhancement, which are estimated to be bright scattering peaks intuitively. These results would inspire the dispersion engineering and characterization of coupled phononic nano-resonators for diverse nanophotonic applications.
Text
Hu et al Manuscript R2
- Accepted Manuscript
More information
Accepted/In Press date: 3 May 2022
e-pub ahead of print date: 24 May 2022
Published date: 1 June 2022
Additional Information:
Funding Information:
This work was supported by the National Key Research and Development Program of China (No. 2019YFE0121700), the National Natural Science Foundation of China (No. 62005070), the Fundamental Research Founds for the Provincial Universities of Zhejiang (Nos. GK219909299001-003 and GK209907299001-016), and the Research Grants Council of Hong Kong (No. AoE/P-701/20). The authors thank the Key Laboratory of Nanodevices of Jiangsu Province at SINANO, (Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences) the lab Nano-X at SINANO and Westlake Center for Micro/Nano Fabrication for technical support in the near-field spectroscopy.
Publisher Copyright:
© 2022 Author(s).
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Local EPrints ID: 468511
URI: http://eprints.soton.ac.uk/id/eprint/468511
PURE UUID: c068ac82-6d67-4f53-90ea-eeb67ab58c63
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Date deposited: 17 Aug 2022 16:30
Last modified: 06 Jun 2024 01:52
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Contributors
Author:
Xin Hu
Author:
Tsz Wing Lo
Author:
Andrea Mancini
Author:
Christopher Gubbin
Author:
Francesco Martini
Author:
Jian Zhang
Author:
Zhongmiao Gong
Author:
Xuefeng Zhang
Author:
Dangyuan Lei
Author:
Stefan A. Maier
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