Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared Regime
Vanadium dioxide (VO2) undergoes a reversible phase change, from semiconducting to metallic, with a change in temperature. Herein, plasmonic switches–based on gold nanoparticles (Au NPs) embedded between layers of VO2 films–that exhibit enhanced switching of the optical transmission as the temperatu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2022-03-01
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| Series: | Advanced Photonics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/adpr.202100253 |
| _version_ | 1819109203071991808 |
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| author | Ajay Kumar Agrawal Abhijit Das Nitin Gupta Kamal Kumar Anuj Dhawan |
| author_facet | Ajay Kumar Agrawal Abhijit Das Nitin Gupta Kamal Kumar Anuj Dhawan |
| author_sort | Ajay Kumar Agrawal |
| collection | DOAJ |
| description | Vanadium dioxide (VO2) undergoes a reversible phase change, from semiconducting to metallic, with a change in temperature. Herein, plasmonic switches–based on gold nanoparticles (Au NPs) embedded between layers of VO2 films–that exhibit enhanced switching of the optical transmission as the temperature is increased above the VO2 phase transition threshold are presented. The operating wavelength of the switching device can be tuned between 650 and 1000 nm using the localized surface plasmon resonance properties of the Au NPs. This is for the first time that plasmonic switches have been demonstrated in the visible spectral regime (i.e., for wavelengths shorter than 700 nm) when VO2 is employed as the phase change material. A higher switchability, i.e., a higher extinction ratio upon phase transition of VO2, than what has been shown earlier in the spectral regions less than 1000 nm is demonstrated experimentally and theoretically. All the device layers are grown at the same substrate temperature and laser intensity via a single‐vacuum pulsed laser deposition process, leading to a simplified large‐area fabrication process. It is also shown for the first time that the Au NPs embedded in the proposed Au‐VO2 nanocomposites are crystalline. |
| first_indexed | 2024-12-22T03:22:05Z |
| format | Article |
| id | doaj.art-59f80bf34b084f52ac0c90b31adef598 |
| institution | Directory Open Access Journal |
| issn | 2699-9293 |
| language | English |
| last_indexed | 2024-12-22T03:22:05Z |
| publishDate | 2022-03-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj.art-59f80bf34b084f52ac0c90b31adef5982022-12-21T18:40:41ZengWiley-VCHAdvanced Photonics Research2699-92932022-03-0133n/an/a10.1002/adpr.202100253Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared RegimeAjay Kumar Agrawal0Abhijit Das1Nitin Gupta2Kamal Kumar3Anuj Dhawan4Department of Electrical Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 IndiaDepartment of Electrical Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 IndiaDepartment of Electrical Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 IndiaDepartment of Electrical Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 IndiaDepartment of Electrical Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 IndiaVanadium dioxide (VO2) undergoes a reversible phase change, from semiconducting to metallic, with a change in temperature. Herein, plasmonic switches–based on gold nanoparticles (Au NPs) embedded between layers of VO2 films–that exhibit enhanced switching of the optical transmission as the temperature is increased above the VO2 phase transition threshold are presented. The operating wavelength of the switching device can be tuned between 650 and 1000 nm using the localized surface plasmon resonance properties of the Au NPs. This is for the first time that plasmonic switches have been demonstrated in the visible spectral regime (i.e., for wavelengths shorter than 700 nm) when VO2 is employed as the phase change material. A higher switchability, i.e., a higher extinction ratio upon phase transition of VO2, than what has been shown earlier in the spectral regions less than 1000 nm is demonstrated experimentally and theoretically. All the device layers are grown at the same substrate temperature and laser intensity via a single‐vacuum pulsed laser deposition process, leading to a simplified large‐area fabrication process. It is also shown for the first time that the Au NPs embedded in the proposed Au‐VO2 nanocomposites are crystalline.https://doi.org/10.1002/adpr.202100253crystalline gold nanoparticlesoptical switchesplasmonicspulsed laser depositiontunabilityvanadium dioxide |
| spellingShingle | Ajay Kumar Agrawal Abhijit Das Nitin Gupta Kamal Kumar Anuj Dhawan Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared Regime Advanced Photonics Research crystalline gold nanoparticles optical switches plasmonics pulsed laser deposition tunability vanadium dioxide |
| title | Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared Regime |
| title_full | Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared Regime |
| title_fullStr | Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared Regime |
| title_full_unstemmed | Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared Regime |
| title_short | Large‐Area Plasmonic Switches Based on Crystalline Au Nanoparticles Between VO2 Layers for Enhanced Switching in Visible–Near‐Infrared Regime |
| title_sort | large area plasmonic switches based on crystalline au nanoparticles between vo2 layers for enhanced switching in visible near infrared regime |
| topic | crystalline gold nanoparticles optical switches plasmonics pulsed laser deposition tunability vanadium dioxide |
| url | https://doi.org/10.1002/adpr.202100253 |
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