Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritons
Geometrical chirality is a widespread phenomenon that has fundamental implications for discriminating enantiomers of biomolecules. In order to enhance the chiral response of the medium, it has been suggested to couple chiral molecules to resonant optical cavities in order to enhance the circular dic...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2020-02-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2019-0372 |
| _version_ | 1818585273605292032 |
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| author | Baranov Denis G. Munkhbat Battulga Länk Nils Odebo Verre Ruggero Käll Mikael Shegai Timur |
| author_facet | Baranov Denis G. Munkhbat Battulga Länk Nils Odebo Verre Ruggero Käll Mikael Shegai Timur |
| author_sort | Baranov Denis G. |
| collection | DOAJ |
| description | Geometrical chirality is a widespread phenomenon that has fundamental implications for discriminating enantiomers of biomolecules. In order to enhance the chiral response of the medium, it has been suggested to couple chiral molecules to resonant optical cavities in order to enhance the circular dichroism (CD) signal at the resonant frequency of the cavity. Here, we studied a distinctly different regime of chiral light-matter interaction, wherein the CD signal of a chiral medium splits into polaritonic modes by reaching the strong coupling regime with an optical microcavity. Specifically, we show that by strongly coupling chiral plasmonic nanoparticles to a non-chiral Fabry-Pérot microcavity one can imprint the mode splitting on the CD spectrum of the coupled system and thereby effectively shift the initial chiral resonance to a different energy. We first examined the effect with the use of analytical transfer-matrix method as well as numerical finite-difference time-domain (FDTD) simulations. Furthermore, we confirmed the validity of theoretical predictions in a proof-of-principle experiment involving chiral plasmonic nanoparticles coupled to a Fabry-Pérot microcavity. |
| first_indexed | 2024-12-16T08:34:27Z |
| format | Article |
| id | doaj.art-8f6ef940cee24e4cbe4805e7873b95d3 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-12-16T08:34:27Z |
| publishDate | 2020-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-8f6ef940cee24e4cbe4805e7873b95d32022-12-21T22:37:48ZengDe GruyterNanophotonics2192-86142020-02-019228329310.1515/nanoph-2019-0372nanoph-2019-0372Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritonsBaranov Denis G.0Munkhbat Battulga1Länk Nils Odebo2Verre Ruggero3Käll Mikael4Shegai Timur5Department of Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenDepartment of Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenDepartment of Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenDepartment of Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenDepartment of Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenDepartment of Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenGeometrical chirality is a widespread phenomenon that has fundamental implications for discriminating enantiomers of biomolecules. In order to enhance the chiral response of the medium, it has been suggested to couple chiral molecules to resonant optical cavities in order to enhance the circular dichroism (CD) signal at the resonant frequency of the cavity. Here, we studied a distinctly different regime of chiral light-matter interaction, wherein the CD signal of a chiral medium splits into polaritonic modes by reaching the strong coupling regime with an optical microcavity. Specifically, we show that by strongly coupling chiral plasmonic nanoparticles to a non-chiral Fabry-Pérot microcavity one can imprint the mode splitting on the CD spectrum of the coupled system and thereby effectively shift the initial chiral resonance to a different energy. We first examined the effect with the use of analytical transfer-matrix method as well as numerical finite-difference time-domain (FDTD) simulations. Furthermore, we confirmed the validity of theoretical predictions in a proof-of-principle experiment involving chiral plasmonic nanoparticles coupled to a Fabry-Pérot microcavity.https://doi.org/10.1515/nanoph-2019-0372nanophotonicsstrong couplingchiralitypolarizationplasmonics |
| spellingShingle | Baranov Denis G. Munkhbat Battulga Länk Nils Odebo Verre Ruggero Käll Mikael Shegai Timur Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritons Nanophotonics nanophotonics strong coupling chirality polarization plasmonics |
| title | Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritons |
| title_full | Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritons |
| title_fullStr | Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritons |
| title_full_unstemmed | Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritons |
| title_short | Circular dichroism mode splitting and bounds to its enhancement with cavity-plasmon-polaritons |
| title_sort | circular dichroism mode splitting and bounds to its enhancement with cavity plasmon polaritons |
| topic | nanophotonics strong coupling chirality polarization plasmonics |
| url | https://doi.org/10.1515/nanoph-2019-0372 |
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