Bimodal Plasmonic Refractive Index Sensors Based on SU-8 Waveguides
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arXiv
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866908301919256576 |
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| author | Bhalerao, Omkar Suckow, Stephan Windgassen, Horst Biller, Harry Fotiadis, Konstantinos Simos, Stelios Chatzianagnostou, Evangelia Spasopoulos, Dimosthenis Das, Pratyusha Markey, Laurent Weeber, Jean-Claude Pleros, Nikos Schirmer, Matthias Lemme, Max C. |
| author_facet | Bhalerao, Omkar Suckow, Stephan Windgassen, Horst Biller, Harry Fotiadis, Konstantinos Simos, Stelios Chatzianagnostou, Evangelia Spasopoulos, Dimosthenis Das, Pratyusha Markey, Laurent Weeber, Jean-Claude Pleros, Nikos Schirmer, Matthias Lemme, Max C. |
| contents | Plasmonic refractive index sensors are essential for detecting subtle variations in the ambient environment through surface plasmon interactions. Current efforts utilizing CMOS-compatible, plasmo-photonic Mach-Zehnder interferometers with active power balancing exhibit high sensitivities at the cost of fabrication and measurement complexity. Alternatively, passive bimodal plasmonic interferometers based on SU-8 waveguides present a cost-effective solution with a smaller device footprint, though they currently lack opto-mechanical isolation due to exposed photonic waveguides. In this work, we introduce innovative polymer-core and polymer-cladded bimodal plasmonic refractive index sensors with high refractive index contrast. Our sensors feature an aluminum stripe, a bilayer SU-8 photonic waveguide core, and the experimental optical cladding polymer SX AR LWL 2.0. They achieve a sensitivity of (6300 $\pm$ 460) nm/RIU (refractive index unit), surpassing both traditional and polymer-based plasmo-photonic sensors. This approach enables integrated, wafer-scale, CMOS-compatible, and low-cost sensors and facilitates plasmonic refractive index sensing platforms for various applications. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_05716 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bimodal Plasmonic Refractive Index Sensors Based on SU-8 Waveguides Bhalerao, Omkar Suckow, Stephan Windgassen, Horst Biller, Harry Fotiadis, Konstantinos Simos, Stelios Chatzianagnostou, Evangelia Spasopoulos, Dimosthenis Das, Pratyusha Markey, Laurent Weeber, Jean-Claude Pleros, Nikos Schirmer, Matthias Lemme, Max C. Optics Applied Physics Plasmonic refractive index sensors are essential for detecting subtle variations in the ambient environment through surface plasmon interactions. Current efforts utilizing CMOS-compatible, plasmo-photonic Mach-Zehnder interferometers with active power balancing exhibit high sensitivities at the cost of fabrication and measurement complexity. Alternatively, passive bimodal plasmonic interferometers based on SU-8 waveguides present a cost-effective solution with a smaller device footprint, though they currently lack opto-mechanical isolation due to exposed photonic waveguides. In this work, we introduce innovative polymer-core and polymer-cladded bimodal plasmonic refractive index sensors with high refractive index contrast. Our sensors feature an aluminum stripe, a bilayer SU-8 photonic waveguide core, and the experimental optical cladding polymer SX AR LWL 2.0. They achieve a sensitivity of (6300 $\pm$ 460) nm/RIU (refractive index unit), surpassing both traditional and polymer-based plasmo-photonic sensors. This approach enables integrated, wafer-scale, CMOS-compatible, and low-cost sensors and facilitates plasmonic refractive index sensing platforms for various applications. |
| title | Bimodal Plasmonic Refractive Index Sensors Based on SU-8 Waveguides |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2405.05716 |