VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructures
Abstract We have proposed vanadium dioxide (VO2) based polarization-independent dual-wavelength plasmonic switches using a periodic combination of U and C shaped gold nanostructures on a gold coated silicon dioxide (SiO2) substrate with a thin VO2 film as spacer between the nanostructures and the un...
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Nature Portfolio
2025-02-01
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| Online Access: | https://doi.org/10.1038/s41598-025-85349-9 |
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| author | Kirti Dalal Yashna Sharma |
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| description | Abstract We have proposed vanadium dioxide (VO2) based polarization-independent dual-wavelength plasmonic switches using a periodic combination of U and C shaped gold nanostructures on a gold coated silicon dioxide (SiO2) substrate with a thin VO2 film as spacer between the nanostructures and the underlying substrate. A spatial offset between the two nanostructures is taken such that high switching efficiency is obtained simultaneously at two wavelengths for all polarization angles of incident light. The switching mechanism is based on the transformation of the phase change material, VO2, from its monoclinic semiconductor state to its tetragonal metal state when exposed to an external stimulus. This transformation leads to a significant change in the optical behavior of the proposed switch, leading to an effective transition from ON to OFF state. Finite difference time domain (FDTD) modelling shows that the proposed switches are capable of achieving a high extinction ratio of ~ 20 dB at two wavelengths—1560 nm and 2130 nm—for incident light with any polarization angle. To demonstrate the spectral tunability of switching wavelengths, the optimization of the geometrical parameters is also carried out. These switches can be employed in telecommunication networks, optical communications, and integrated photonic circuits. |
| format | Article |
| id | doaj-art-a24ee1bcbdae4ab3b031cd482b009461 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-a24ee1bcbdae4ab3b031cd482b0094612025-02-02T12:20:34ZengNature PortfolioScientific Reports2045-23222025-02-0115111610.1038/s41598-025-85349-9VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructuresKirti Dalal0Yashna Sharma1Department of Electronics and Communication Engineering, Delhi Technological UniversityDepartment of Electronics and Communication Engineering, Delhi Technological UniversityAbstract We have proposed vanadium dioxide (VO2) based polarization-independent dual-wavelength plasmonic switches using a periodic combination of U and C shaped gold nanostructures on a gold coated silicon dioxide (SiO2) substrate with a thin VO2 film as spacer between the nanostructures and the underlying substrate. A spatial offset between the two nanostructures is taken such that high switching efficiency is obtained simultaneously at two wavelengths for all polarization angles of incident light. The switching mechanism is based on the transformation of the phase change material, VO2, from its monoclinic semiconductor state to its tetragonal metal state when exposed to an external stimulus. This transformation leads to a significant change in the optical behavior of the proposed switch, leading to an effective transition from ON to OFF state. Finite difference time domain (FDTD) modelling shows that the proposed switches are capable of achieving a high extinction ratio of ~ 20 dB at two wavelengths—1560 nm and 2130 nm—for incident light with any polarization angle. To demonstrate the spectral tunability of switching wavelengths, the optimization of the geometrical parameters is also carried out. These switches can be employed in telecommunication networks, optical communications, and integrated photonic circuits.https://doi.org/10.1038/s41598-025-85349-9PlasmonicsNanostructuresPhase change materialsVO2Polarization-independent switchesMulti-wavelength switches |
| spellingShingle | Kirti Dalal Yashna Sharma VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructures Scientific Reports Plasmonics Nanostructures Phase change materials VO2 Polarization-independent switches Multi-wavelength switches |
| title | VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructures |
| title_full | VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructures |
| title_fullStr | VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructures |
| title_full_unstemmed | VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructures |
| title_short | VO2 based polarization-independent dual-wavelength plasmonic switches using U and C shaped nanostructures |
| title_sort | vo2 based polarization independent dual wavelength plasmonic switches using u and c shaped nanostructures |
| topic | Plasmonics Nanostructures Phase change materials VO2 Polarization-independent switches Multi-wavelength switches |
| url | https://doi.org/10.1038/s41598-025-85349-9 |
| work_keys_str_mv | AT kirtidalal vo2basedpolarizationindependentdualwavelengthplasmonicswitchesusinguandcshapednanostructures AT yashnasharma vo2basedpolarizationindependentdualwavelengthplasmonicswitchesusinguandcshapednanostructures |