Experimental Demonstration of Plasmon-Enabled Monolithic Bragg Reflectors for Infrared Light via Inverse Design
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866911362500788224 |
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| author | Badura, Mikołaj Janczak, Mikołaj Rygała, Michał Smołka, Tristan Łozińska, Adriana Dawidowski, Wojciech Michałowski, Paweł Piotr Ściana, Beata Motyka, Marcin Czyszanowski, Tomasz |
| author_facet | Badura, Mikołaj Janczak, Mikołaj Rygała, Michał Smołka, Tristan Łozińska, Adriana Dawidowski, Wojciech Michałowski, Paweł Piotr Ściana, Beata Motyka, Marcin Czyszanowski, Tomasz |
| contents | High-reflectivity mirrors in the mid-infrared (MIR) range are essential for next-generation optoelectronic devices but are still constrained by strain accumulation, poor thermal conductivity, and growth instability of thick multi-alloy stacks in conventional distributed Bragg reflectors (DBRs). We introduce plasmon-enabled DBRs (PE DBRs) based on modulation-doped monolithic InP, where plasmonic dispersion in highly doped layers provides a strong refractive-index contrast. Using inverse-design optimization targeting reduced free-carrier absorption and maximized reflectivity, we demonstrate that PE DBRs can achieve reflectivities approaching 100%. Experimentally grown 14 μm thick InP PE DBRs exhibit up to 99% reflectance with bandwidths reaching 18% of the design wavelength. The monolithic, junction-free configuration ensures low resistivity and enhanced thermal performance, offering a scalable platform for efficient plasmonic mirrors in MIR photonics, with potential applications in photodetectors, light-emitting diodes and lasers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_05365 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Experimental Demonstration of Plasmon-Enabled Monolithic Bragg Reflectors for Infrared Light via Inverse Design Badura, Mikołaj Janczak, Mikołaj Rygała, Michał Smołka, Tristan Łozińska, Adriana Dawidowski, Wojciech Michałowski, Paweł Piotr Ściana, Beata Motyka, Marcin Czyszanowski, Tomasz Optics High-reflectivity mirrors in the mid-infrared (MIR) range are essential for next-generation optoelectronic devices but are still constrained by strain accumulation, poor thermal conductivity, and growth instability of thick multi-alloy stacks in conventional distributed Bragg reflectors (DBRs). We introduce plasmon-enabled DBRs (PE DBRs) based on modulation-doped monolithic InP, where plasmonic dispersion in highly doped layers provides a strong refractive-index contrast. Using inverse-design optimization targeting reduced free-carrier absorption and maximized reflectivity, we demonstrate that PE DBRs can achieve reflectivities approaching 100%. Experimentally grown 14 μm thick InP PE DBRs exhibit up to 99% reflectance with bandwidths reaching 18% of the design wavelength. The monolithic, junction-free configuration ensures low resistivity and enhanced thermal performance, offering a scalable platform for efficient plasmonic mirrors in MIR photonics, with potential applications in photodetectors, light-emitting diodes and lasers. |
| title | Experimental Demonstration of Plasmon-Enabled Monolithic Bragg Reflectors for Infrared Light via Inverse Design |
| topic | Optics |
| url | https://arxiv.org/abs/2601.05365 |