Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxide
Abstract Structural anisotropy in crystals is crucial for controlling light propagation, particularly in the infrared spectral regime where optical frequencies overlap with crystalline lattice resonances, enabling light-matter coupled quasiparticles called phonon polaritons (PhPs). Exploring PhPs in...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-08-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-40789-7 |
| _version_ | 1797558379651006464 |
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| author | Joseph Matson Sören Wasserroth Xiang Ni Maximilian Obst Katja Diaz-Granados Giulia Carini Enrico Maria Renzi Emanuele Galiffi Thomas G. Folland Lukas M. Eng J. Michael Klopf Stefan Mastel Sean Armster Vincent Gambin Martin Wolf Susanne C. Kehr Andrea Alù Alexander Paarmann Joshua D. Caldwell |
| author_facet | Joseph Matson Sören Wasserroth Xiang Ni Maximilian Obst Katja Diaz-Granados Giulia Carini Enrico Maria Renzi Emanuele Galiffi Thomas G. Folland Lukas M. Eng J. Michael Klopf Stefan Mastel Sean Armster Vincent Gambin Martin Wolf Susanne C. Kehr Andrea Alù Alexander Paarmann Joshua D. Caldwell |
| author_sort | Joseph Matson |
| collection | DOAJ |
| description | Abstract Structural anisotropy in crystals is crucial for controlling light propagation, particularly in the infrared spectral regime where optical frequencies overlap with crystalline lattice resonances, enabling light-matter coupled quasiparticles called phonon polaritons (PhPs). Exploring PhPs in anisotropic materials like hBN and MoO3 has led to advancements in light confinement and manipulation. In a recent study, PhPs in the monoclinic crystal β-Ga2O3 (bGO) were shown to exhibit strongly asymmetric propagation with a frequency dispersive optical axis. Here, using scanning near-field optical microscopy (s-SNOM), we directly image the symmetry-broken propagation of hyperbolic shear polaritons in bGO. Further, we demonstrate the control and enhancement of shear-induced propagation asymmetry by varying the incident laser orientation and polariton momentum using different sizes of nano-antennas. Finally, we observe significant rotation of the hyperbola axis by changing the frequency of incident light. Our findings lay the groundwork for the widespread utilization and implementation of polaritons in low-symmetry crystals. |
| first_indexed | 2024-03-10T17:30:40Z |
| format | Article |
| id | doaj.art-6aad7bb7628b4b0ab964f8e41dbef747 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-10T17:30:40Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-6aad7bb7628b4b0ab964f8e41dbef7472023-11-20T10:02:10ZengNature PortfolioNature Communications2041-17232023-08-011411810.1038/s41467-023-40789-7Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxideJoseph Matson0Sören Wasserroth1Xiang Ni2Maximilian Obst3Katja Diaz-Granados4Giulia Carini5Enrico Maria Renzi6Emanuele Galiffi7Thomas G. Folland8Lukas M. Eng9J. Michael Klopf10Stefan Mastel11Sean Armster12Vincent Gambin13Martin Wolf14Susanne C. Kehr15Andrea Alù16Alexander Paarmann17Joshua D. Caldwell18Vanderbilt UniversityFritz Haber Institute of the Max Planck SocietySchool of Physics, Central South UniversityInstitute of Applied Physics, TUD Dresden University of TechnologyVanderbilt UniversityFritz Haber Institute of the Max Planck SocietyPhotonics Initiative, Advanced Science Research Center, City University of New YorkPhotonics Initiative, Advanced Science Research Center, City University of New YorkThe University of IowaInstitute of Applied Physics, TUD Dresden University of TechnologyHelmholtz-Zentrum Dresden-RossendorfAttocube Systems AGNG NEXT, Northrop Grumman CorporationNG NEXT, Northrop Grumman CorporationFritz Haber Institute of the Max Planck SocietyInstitute of Applied Physics, TUD Dresden University of TechnologyPhotonics Initiative, Advanced Science Research Center, City University of New YorkFritz Haber Institute of the Max Planck SocietyVanderbilt UniversityAbstract Structural anisotropy in crystals is crucial for controlling light propagation, particularly in the infrared spectral regime where optical frequencies overlap with crystalline lattice resonances, enabling light-matter coupled quasiparticles called phonon polaritons (PhPs). Exploring PhPs in anisotropic materials like hBN and MoO3 has led to advancements in light confinement and manipulation. In a recent study, PhPs in the monoclinic crystal β-Ga2O3 (bGO) were shown to exhibit strongly asymmetric propagation with a frequency dispersive optical axis. Here, using scanning near-field optical microscopy (s-SNOM), we directly image the symmetry-broken propagation of hyperbolic shear polaritons in bGO. Further, we demonstrate the control and enhancement of shear-induced propagation asymmetry by varying the incident laser orientation and polariton momentum using different sizes of nano-antennas. Finally, we observe significant rotation of the hyperbola axis by changing the frequency of incident light. Our findings lay the groundwork for the widespread utilization and implementation of polaritons in low-symmetry crystals.https://doi.org/10.1038/s41467-023-40789-7 |
| spellingShingle | Joseph Matson Sören Wasserroth Xiang Ni Maximilian Obst Katja Diaz-Granados Giulia Carini Enrico Maria Renzi Emanuele Galiffi Thomas G. Folland Lukas M. Eng J. Michael Klopf Stefan Mastel Sean Armster Vincent Gambin Martin Wolf Susanne C. Kehr Andrea Alù Alexander Paarmann Joshua D. Caldwell Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxide Nature Communications |
| title | Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxide |
| title_full | Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxide |
| title_fullStr | Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxide |
| title_full_unstemmed | Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxide |
| title_short | Controlling the propagation asymmetry of hyperbolic shear polaritons in beta-gallium oxide |
| title_sort | controlling the propagation asymmetry of hyperbolic shear polaritons in beta gallium oxide |
| url | https://doi.org/10.1038/s41467-023-40789-7 |
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