Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infrared
Strong light–matter coupling is of much interest for both fundamental research and technological applications. The recently studied bound state in the continuum (BIC) phenomenon in photonics with controlled radiation loss rate significantly facilitates the realization of the strong coupling effect....
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-08-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2022-0311 |
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| author | Sun Kaili Sun Min Cai Yangjian Levy Uriel Han Zhanghua |
| author_facet | Sun Kaili Sun Min Cai Yangjian Levy Uriel Han Zhanghua |
| author_sort | Sun Kaili |
| collection | DOAJ |
| description | Strong light–matter coupling is of much interest for both fundamental research and technological applications. The recently studied bound state in the continuum (BIC) phenomenon in photonics with controlled radiation loss rate significantly facilitates the realization of the strong coupling effect. In this work, we report the experimental observation of room temperature strong coupling between quasi-BIC resonances supported by a zigzag metasurface array of germanium elliptical disks and the vibrational resonance of polymethyl methacrylate (PMMA) molecules in the mid-infrared. Based on the approach of tuning the quasi-BIC resonance by changing the thickness of the coated PMMA layer, we can easily observe the strong coupling phenomenon, manifested by significant spectral splitting and typical anti-crossing behaviors in the transmission spectrum, with the spectral distance between the two hybrid photon-vibration resonances significantly larger than the bandwidth of both the quasi-BIC resonance and the PMMA absorption line. Our results demonstrate that the use of quasi-BIC resonance in all-dielectric nanostructures provides an effective and convenient approach for the realization of strong coupling effect. |
| format | Article |
| id | doaj-art-2db7bae348c6430b9488d50d41b1c9bd |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-2db7bae348c6430b9488d50d41b1c9bd2025-08-20T02:23:36ZengDe GruyterNanophotonics2192-86142022-08-0111184221422910.1515/nanoph-2022-0311Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infraredSun Kaili0Sun Min1Cai Yangjian2Levy Uriel3Han Zhanghua4Shandong Provincial Key Laboratory of Optics and Photonic Devices, Center of Light Manipulation and Applications, School of Physics and Electronics, Shandong Normal University, Jinan250358, ChinaShandong Provincial Key Laboratory of Optics and Photonic Devices, Center of Light Manipulation and Applications, School of Physics and Electronics, Shandong Normal University, Jinan250358, ChinaShandong Provincial Key Laboratory of Optics and Photonic Devices, Center of Light Manipulation and Applications, School of Physics and Electronics, Shandong Normal University, Jinan250358, ChinaDepartment of Applied Physics, and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, IsraelShandong Provincial Key Laboratory of Optics and Photonic Devices, Center of Light Manipulation and Applications, School of Physics and Electronics, Shandong Normal University, Jinan250358, ChinaStrong light–matter coupling is of much interest for both fundamental research and technological applications. The recently studied bound state in the continuum (BIC) phenomenon in photonics with controlled radiation loss rate significantly facilitates the realization of the strong coupling effect. In this work, we report the experimental observation of room temperature strong coupling between quasi-BIC resonances supported by a zigzag metasurface array of germanium elliptical disks and the vibrational resonance of polymethyl methacrylate (PMMA) molecules in the mid-infrared. Based on the approach of tuning the quasi-BIC resonance by changing the thickness of the coated PMMA layer, we can easily observe the strong coupling phenomenon, manifested by significant spectral splitting and typical anti-crossing behaviors in the transmission spectrum, with the spectral distance between the two hybrid photon-vibration resonances significantly larger than the bandwidth of both the quasi-BIC resonance and the PMMA absorption line. Our results demonstrate that the use of quasi-BIC resonance in all-dielectric nanostructures provides an effective and convenient approach for the realization of strong coupling effect.https://doi.org/10.1515/nanoph-2022-0311bound state in the continuumstrong couplingvibrational resonance |
| spellingShingle | Sun Kaili Sun Min Cai Yangjian Levy Uriel Han Zhanghua Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infrared Nanophotonics bound state in the continuum strong coupling vibrational resonance |
| title | Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infrared |
| title_full | Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infrared |
| title_fullStr | Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infrared |
| title_full_unstemmed | Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infrared |
| title_short | Strong coupling between quasi-bound states in the continuum and molecular vibrations in the mid-infrared |
| title_sort | strong coupling between quasi bound states in the continuum and molecular vibrations in the mid infrared |
| topic | bound state in the continuum strong coupling vibrational resonance |
| url | https://doi.org/10.1515/nanoph-2022-0311 |
| work_keys_str_mv | AT sunkaili strongcouplingbetweenquasiboundstatesinthecontinuumandmolecularvibrationsinthemidinfrared AT sunmin strongcouplingbetweenquasiboundstatesinthecontinuumandmolecularvibrationsinthemidinfrared AT caiyangjian strongcouplingbetweenquasiboundstatesinthecontinuumandmolecularvibrationsinthemidinfrared AT levyuriel strongcouplingbetweenquasiboundstatesinthecontinuumandmolecularvibrationsinthemidinfrared AT hanzhanghua strongcouplingbetweenquasiboundstatesinthecontinuumandmolecularvibrationsinthemidinfrared |