Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antenna
Abstract We report a nonlinear terahertz (THz) detection device based on a metallic bull’s-eye plasmonic antenna. The antenna, fabricated with femtosecond laser direct writing and deposited on a nonlinear gallium phosphide (GaP) crystal, focuses incoming THz waveforms within the sub-wavelength bull’...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-84625-4 |
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| author | Hesam Heydarian Xitong Xie Aswin Vishnuradhan Wei Cui Arnaud Weck Angela Gamouras Jean-Michel Ménard |
| author_facet | Hesam Heydarian Xitong Xie Aswin Vishnuradhan Wei Cui Arnaud Weck Angela Gamouras Jean-Michel Ménard |
| author_sort | Hesam Heydarian |
| collection | DOAJ |
| description | Abstract We report a nonlinear terahertz (THz) detection device based on a metallic bull’s-eye plasmonic antenna. The antenna, fabricated with femtosecond laser direct writing and deposited on a nonlinear gallium phosphide (GaP) crystal, focuses incoming THz waveforms within the sub-wavelength bull’s eye region to locally enhance the THz field. Additionally, the plasmonic structure minimizes diffraction effects allowing a relatively long interaction length between the transmitted THz field and the co-propagating near-infrared gating pulse used in an electro-optic sampling configuration. We show an increased detection sensitivity over a large spectral range extending from 1.4 THz to 3.1 THz with a peak enhancement factor of 3.1 at 2.7 THz. We demonstrate that this plasmonic structure is especially effective in monitoring THz signals affected by beam wandering or varying spot sizes. Our concept can be adapted to any second-order nonlinear crystal to realize compact and sensitive THz detectors without the need for tight beam focusing or high-precision alignment. This work paves the way for future developments of compact and sensitive THz detectors, notably for applications in wireless communications. |
| format | Article |
| id | doaj-art-cb5bfc900481421d82a3c9e24964f102 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-cb5bfc900481421d82a3c9e24964f1022025-01-05T12:21:42ZengNature PortfolioScientific Reports2045-23222025-01-011511610.1038/s41598-024-84625-4Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antennaHesam Heydarian0Xitong Xie1Aswin Vishnuradhan2Wei Cui3Arnaud Weck4Angela Gamouras5Jean-Michel Ménard6Department of Physics, University of OttawaDepartment of Mechanical Engineering, University of OttawaDepartment of Physics, University of OttawaDepartment of Physics, University of OttawaDepartment of Physics, University of OttawaDepartment of Physics, University of OttawaDepartment of Physics, University of OttawaAbstract We report a nonlinear terahertz (THz) detection device based on a metallic bull’s-eye plasmonic antenna. The antenna, fabricated with femtosecond laser direct writing and deposited on a nonlinear gallium phosphide (GaP) crystal, focuses incoming THz waveforms within the sub-wavelength bull’s eye region to locally enhance the THz field. Additionally, the plasmonic structure minimizes diffraction effects allowing a relatively long interaction length between the transmitted THz field and the co-propagating near-infrared gating pulse used in an electro-optic sampling configuration. We show an increased detection sensitivity over a large spectral range extending from 1.4 THz to 3.1 THz with a peak enhancement factor of 3.1 at 2.7 THz. We demonstrate that this plasmonic structure is especially effective in monitoring THz signals affected by beam wandering or varying spot sizes. Our concept can be adapted to any second-order nonlinear crystal to realize compact and sensitive THz detectors without the need for tight beam focusing or high-precision alignment. This work paves the way for future developments of compact and sensitive THz detectors, notably for applications in wireless communications.https://doi.org/10.1038/s41598-024-84625-4Terahertz detectorNonlinear opticsPlasmonicElectro-optic sampling |
| spellingShingle | Hesam Heydarian Xitong Xie Aswin Vishnuradhan Wei Cui Arnaud Weck Angela Gamouras Jean-Michel Ménard Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antenna Scientific Reports Terahertz detector Nonlinear optics Plasmonic Electro-optic sampling |
| title | Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antenna |
| title_full | Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antenna |
| title_fullStr | Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antenna |
| title_full_unstemmed | Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antenna |
| title_short | Adaptable electro-optic detection of THz radiation using a laser-written bull’s-eye antenna |
| title_sort | adaptable electro optic detection of thz radiation using a laser written bull s eye antenna |
| topic | Terahertz detector Nonlinear optics Plasmonic Electro-optic sampling |
| url | https://doi.org/10.1038/s41598-024-84625-4 |
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