Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon System
In this work, we theoretically study the optical properties of a graphene nanoribbon with a quantum dot (QD) on it. The system consists of a graphene nanoribbon with dimensions of 400 × 3100 (nm<sup>2</sup>) and a quantum dot with a nanoscale radius. The quantum dot is symmetrically loca...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/4/220 |
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| author | Sahar Armaghani Ali Rostami Peyman Mirtaheri |
| author_facet | Sahar Armaghani Ali Rostami Peyman Mirtaheri |
| author_sort | Sahar Armaghani |
| collection | DOAJ |
| description | In this work, we theoretically study the optical properties of a graphene nanoribbon with a quantum dot (QD) on it. The system consists of a graphene nanoribbon with dimensions of 400 × 3100 (nm<sup>2</sup>) and a quantum dot with a nanoscale radius. The quantum dot is symmetrically located at the center of the graphene nanoribbon to simplify the mathematical model. To calculate the optical properties (susceptibility) of the system, a broadband electromagnetic wave (0.5–2.5 μm) is applied to the structure to model dipole-dipole interaction. Considering the input field and calculating the total induced polarization, the optical susceptibility of the system is calculated. The applied electromagnetic field excites the surface plasmon on the graphene nanoribbon and the excitons of QDs. The induced dipoles in the graphene nanoribbon and the QD will interact with each other. We show that the parameters of both materials strongly influence dipole-dipole interaction. In particular, the effect of QDs (location on graphene and radius) on the optical properties of the considered system was studied. The obtained results can be used to introduce periodic optical structures in nanoscale by inserting QDs in a periodic array on graphene nanoribbon. Additionally, applications such as reflectors, couplers, and wavelength filters can be designed. Considering the presented theoretical framework, we can describe all the optoelectronic and optomechanical applications of complex nanoscale graphene and QD systems. |
| first_indexed | 2024-03-09T13:07:17Z |
| format | Article |
| id | doaj.art-0928c1ac054146c391384e9b602aca12 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T13:07:17Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-0928c1ac054146c391384e9b602aca122023-11-30T21:45:37ZengMDPI AGPhotonics2304-67322022-03-019422010.3390/photonics9040220Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon SystemSahar Armaghani0Ali Rostami1Peyman Mirtaheri2Photonics and Nanocrystal Research Laboratory (PNRL), Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz 5166614761, IranPhotonics and Nanocrystal Research Laboratory (PNRL), Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz 5166614761, IranDepartment of Mechanical, Electronics and Chemical Engineering, OsloMet—Oslo Metropolitan University, 0167 Oslo, NorwayIn this work, we theoretically study the optical properties of a graphene nanoribbon with a quantum dot (QD) on it. The system consists of a graphene nanoribbon with dimensions of 400 × 3100 (nm<sup>2</sup>) and a quantum dot with a nanoscale radius. The quantum dot is symmetrically located at the center of the graphene nanoribbon to simplify the mathematical model. To calculate the optical properties (susceptibility) of the system, a broadband electromagnetic wave (0.5–2.5 μm) is applied to the structure to model dipole-dipole interaction. Considering the input field and calculating the total induced polarization, the optical susceptibility of the system is calculated. The applied electromagnetic field excites the surface plasmon on the graphene nanoribbon and the excitons of QDs. The induced dipoles in the graphene nanoribbon and the QD will interact with each other. We show that the parameters of both materials strongly influence dipole-dipole interaction. In particular, the effect of QDs (location on graphene and radius) on the optical properties of the considered system was studied. The obtained results can be used to introduce periodic optical structures in nanoscale by inserting QDs in a periodic array on graphene nanoribbon. Additionally, applications such as reflectors, couplers, and wavelength filters can be designed. Considering the presented theoretical framework, we can describe all the optoelectronic and optomechanical applications of complex nanoscale graphene and QD systems.https://www.mdpi.com/2304-6732/9/4/220total susceptibilitygraphene nanoribbonquantum dotsurface plasmonbipolar interaction |
| spellingShingle | Sahar Armaghani Ali Rostami Peyman Mirtaheri Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon System Photonics total susceptibility graphene nanoribbon quantum dot surface plasmon bipolar interaction |
| title | Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon System |
| title_full | Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon System |
| title_fullStr | Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon System |
| title_full_unstemmed | Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon System |
| title_short | Analysis and Simulation of the Optical Properties of a Quantum Dot on a Graphene Nanoribbon System |
| title_sort | analysis and simulation of the optical properties of a quantum dot on a graphene nanoribbon system |
| topic | total susceptibility graphene nanoribbon quantum dot surface plasmon bipolar interaction |
| url | https://www.mdpi.com/2304-6732/9/4/220 |
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