Resonance coupling in plasmonic nanomatryoshka homo- and heterodimers
Here, we examine the electromagnetic (EM) energy coupling and hybridization of plasmon resonances between closely spaced concentric nanoshells known as “nanomatryoshka” (NM) units in symmetric and antisymmetric compositions using the Finite Difference Time Domain (FDTD) analysis. Utilizing plasmon h...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2016-06-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4953351 |
| _version_ | 1818065154424700928 |
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| author | Arash Ahmadivand Raju Sinha Nezih Pala |
| author_facet | Arash Ahmadivand Raju Sinha Nezih Pala |
| author_sort | Arash Ahmadivand |
| collection | DOAJ |
| description | Here, we examine the electromagnetic (EM) energy coupling and hybridization of plasmon resonances between closely spaced concentric nanoshells known as “nanomatryoshka” (NM) units in symmetric and antisymmetric compositions using the Finite Difference Time Domain (FDTD) analysis. Utilizing plasmon hybridization model, we calculated the energy level diagrams and verified that, in the symmetric dimer (in-phase mode in a homodimer), plasmonic bonding modes are dominant and tunable within the considered bandwidth. In contrast, in the antisymmetric dimer (out-of-phase mode in a heterodimer), due to the lack of the geometrical symmetry, new antibonding modes appear in the extinction profile, and this condition gives rise to repeal of dipolar field coupling. We also studied the extinction spectra and positions of the antibonding and bonding modes excited due to the energy coupling between silver and gold NM units in a heterodimer structure. Our analysis suggest abnormal shifts in the higher energy modes. We propose a method to analyze the behavior of multilayer concentric nanoshell particles in an antisymmetric orientation employing full dielectric function calculations and the Drude model based on interband transitions in metallic components. This study provides a method to predict the behavior of the higher energy plasmon resonant modes in entirely antisymmetric structures such as compositional heterodimers. |
| first_indexed | 2024-12-10T14:47:23Z |
| format | Article |
| id | doaj.art-be6024f82855467586d7c9e31c83813c |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-10T14:47:23Z |
| publishDate | 2016-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-be6024f82855467586d7c9e31c83813c2022-12-22T01:44:32ZengAIP Publishing LLCAIP Advances2158-32262016-06-0166065102065102-910.1063/1.4953351006606ADVResonance coupling in plasmonic nanomatryoshka homo- and heterodimersArash Ahmadivand0Raju Sinha1Nezih Pala2Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, Florida 33174, USADepartment of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, Florida 33174, USADepartment of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, Florida 33174, USAHere, we examine the electromagnetic (EM) energy coupling and hybridization of plasmon resonances between closely spaced concentric nanoshells known as “nanomatryoshka” (NM) units in symmetric and antisymmetric compositions using the Finite Difference Time Domain (FDTD) analysis. Utilizing plasmon hybridization model, we calculated the energy level diagrams and verified that, in the symmetric dimer (in-phase mode in a homodimer), plasmonic bonding modes are dominant and tunable within the considered bandwidth. In contrast, in the antisymmetric dimer (out-of-phase mode in a heterodimer), due to the lack of the geometrical symmetry, new antibonding modes appear in the extinction profile, and this condition gives rise to repeal of dipolar field coupling. We also studied the extinction spectra and positions of the antibonding and bonding modes excited due to the energy coupling between silver and gold NM units in a heterodimer structure. Our analysis suggest abnormal shifts in the higher energy modes. We propose a method to analyze the behavior of multilayer concentric nanoshell particles in an antisymmetric orientation employing full dielectric function calculations and the Drude model based on interband transitions in metallic components. This study provides a method to predict the behavior of the higher energy plasmon resonant modes in entirely antisymmetric structures such as compositional heterodimers.http://dx.doi.org/10.1063/1.4953351 |
| spellingShingle | Arash Ahmadivand Raju Sinha Nezih Pala Resonance coupling in plasmonic nanomatryoshka homo- and heterodimers AIP Advances |
| title | Resonance coupling in plasmonic nanomatryoshka homo- and heterodimers |
| title_full | Resonance coupling in plasmonic nanomatryoshka homo- and heterodimers |
| title_fullStr | Resonance coupling in plasmonic nanomatryoshka homo- and heterodimers |
| title_full_unstemmed | Resonance coupling in plasmonic nanomatryoshka homo- and heterodimers |
| title_short | Resonance coupling in plasmonic nanomatryoshka homo- and heterodimers |
| title_sort | resonance coupling in plasmonic nanomatryoshka homo and heterodimers |
| url | http://dx.doi.org/10.1063/1.4953351 |
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