Ultracompact computational spectroscopy with a detour-phased planar lens
Compact micro-spectrometers have gained significant attention due to their ease of integration and real-time spectrum measurement capabilities. However, size reduction often compromises performance, particularly in resolution and measurable wavelength range. This work proposes a computational micro-...
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| Format: | Article |
| Language: | English |
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Light Publishing Group
2025-01-01
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| Series: | Light: Advanced Manufacturing |
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| Online Access: | https://www.light-am.com/article/doi/10.37188/lam.2024.044 |
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| author | Wenkai Yang Zijian Wang Jian Xu Dashan Dong Guiyuan Cao Han Lin Baohua Jia Lige Liu Kebin Shi |
| author_facet | Wenkai Yang Zijian Wang Jian Xu Dashan Dong Guiyuan Cao Han Lin Baohua Jia Lige Liu Kebin Shi |
| author_sort | Wenkai Yang |
| collection | DOAJ |
| description | Compact micro-spectrometers have gained significant attention due to their ease of integration and real-time spectrum measurement capabilities. However, size reduction often compromises performance, particularly in resolution and measurable wavelength range. This work proposes a computational micro-spectrometer based on an ultra-thin (~250 nm) detour-phased graphene oxide planar lens with a sub-millimeter footprint, utilizing a spectral-to-spatial mapping method. The varying intensity pattern along the focal axis of the lens acts as a measurement signal, simplifying the system and enabling real-time spectrum acquisition. Combined with computational retrieval method, an input spectrum is reconstructed with a wavelength interval down to 5 nm, representing a 5-time improvement compared with the result when not using computational method. In an optical compartment of 200 μm by 200 μm by 450 μm from lens profile to the detector surface, the ultracompact spectrometer achieves broad spectrum measurement covering the visible range (420−750 nm) with a wavelength interval of 15 nm. Our compact computational micro-spectrometer paves the way for integration into portable, handheld, and wearable devices, holding promise for diverse real-time applications like in-situ health monitoring (e.g., tracking blood glucose levels), food quality assessment, and portable counterfeit detection. |
| format | Article |
| id | doaj-art-316665466dee4a7ea612c2c8e4e68416 |
| institution | DOAJ |
| issn | 2689-9620 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Light Publishing Group |
| record_format | Article |
| series | Light: Advanced Manufacturing |
| spelling | doaj-art-316665466dee4a7ea612c2c8e4e684162025-08-20T03:23:34ZengLight Publishing GroupLight: Advanced Manufacturing2689-96202025-01-015452353110.37188/lam.2024.044Ultracompact computational spectroscopy with a detour-phased planar lensWenkai YangZijian WangJian XuDashan DongGuiyuan Cao0Han Lin1Baohua Jia2Lige LiuKebin ShiCentre for Atomaterials and Nanomanufacturing, School of Science, RMIT University, Melbourne, 3000, VIC, AustraliaCentre for Atomaterials and Nanomanufacturing, School of Science, RMIT University, Melbourne, 3000, VIC, AustraliaCentre for Atomaterials and Nanomanufacturing, School of Science, RMIT University, Melbourne, 3000, VIC, AustraliaCompact micro-spectrometers have gained significant attention due to their ease of integration and real-time spectrum measurement capabilities. However, size reduction often compromises performance, particularly in resolution and measurable wavelength range. This work proposes a computational micro-spectrometer based on an ultra-thin (~250 nm) detour-phased graphene oxide planar lens with a sub-millimeter footprint, utilizing a spectral-to-spatial mapping method. The varying intensity pattern along the focal axis of the lens acts as a measurement signal, simplifying the system and enabling real-time spectrum acquisition. Combined with computational retrieval method, an input spectrum is reconstructed with a wavelength interval down to 5 nm, representing a 5-time improvement compared with the result when not using computational method. In an optical compartment of 200 μm by 200 μm by 450 μm from lens profile to the detector surface, the ultracompact spectrometer achieves broad spectrum measurement covering the visible range (420−750 nm) with a wavelength interval of 15 nm. Our compact computational micro-spectrometer paves the way for integration into portable, handheld, and wearable devices, holding promise for diverse real-time applications like in-situ health monitoring (e.g., tracking blood glucose levels), food quality assessment, and portable counterfeit detection.https://www.light-am.com/article/doi/10.37188/lam.2024.044computational spectrometerplanar lensgraphene oxidedirect laser writing |
| spellingShingle | Wenkai Yang Zijian Wang Jian Xu Dashan Dong Guiyuan Cao Han Lin Baohua Jia Lige Liu Kebin Shi Ultracompact computational spectroscopy with a detour-phased planar lens Light: Advanced Manufacturing computational spectrometer planar lens graphene oxide direct laser writing |
| title | Ultracompact computational spectroscopy with a detour-phased planar lens |
| title_full | Ultracompact computational spectroscopy with a detour-phased planar lens |
| title_fullStr | Ultracompact computational spectroscopy with a detour-phased planar lens |
| title_full_unstemmed | Ultracompact computational spectroscopy with a detour-phased planar lens |
| title_short | Ultracompact computational spectroscopy with a detour-phased planar lens |
| title_sort | ultracompact computational spectroscopy with a detour phased planar lens |
| topic | computational spectrometer planar lens graphene oxide direct laser writing |
| url | https://www.light-am.com/article/doi/10.37188/lam.2024.044 |
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