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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.12573 |
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| _version_ | 1866912074619158528 |
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| author | Lu, Tianshi Deng, Fuyuan Wei, Yufeng Zeng, Zhipeng Li, Xinghui |
| author_facet | Lu, Tianshi Deng, Fuyuan Wei, Yufeng Zeng, Zhipeng Li, Xinghui |
| contents | Subwavelength grating micro-polarizer arrays, as a type of focal plane division simultaneous detection method, are significantly advancing the development and practical application of polarization imaging technology. Based on the cross-scale, dual-period characteristics of the grating array, this paper proposes a fabrication method that combines laser interference lithography with contact lithography. This method constructs a complete single-layer micro-polarizer array photoresist pattern through a four-step lithography process. Compared to traditional point-by-point fabrication methods like EBL and FIB, the patterning time is reduced by 3 to 4 orders of magnitude. Additionally, by introducing a refractive index matching liquid and an alignment method based on substrate contours, the effects of gaps and splicing errors are minimized, resulting in high-quality photoresist patterns with splicing errors less than 1μm. Finally, a double-layer metal grating structure was obtained through pattern transfer. Performance tests show that the micro-polarizer array achieves a maximum transmittance of over 50% and an extinction ratio exceeding 15dB in the 3-15μm wavelength range. This exploration offers a low-cost, high-efficiency path for fabricating micro-polarizer arrays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_12573 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Contact-interference Hybrid lithography: Toward Scalable Fabrication of cross-scale periodic micro structure and demonstration on infrared micro polarizer array Lu, Tianshi Deng, Fuyuan Wei, Yufeng Zeng, Zhipeng Li, Xinghui Optics Subwavelength grating micro-polarizer arrays, as a type of focal plane division simultaneous detection method, are significantly advancing the development and practical application of polarization imaging technology. Based on the cross-scale, dual-period characteristics of the grating array, this paper proposes a fabrication method that combines laser interference lithography with contact lithography. This method constructs a complete single-layer micro-polarizer array photoresist pattern through a four-step lithography process. Compared to traditional point-by-point fabrication methods like EBL and FIB, the patterning time is reduced by 3 to 4 orders of magnitude. Additionally, by introducing a refractive index matching liquid and an alignment method based on substrate contours, the effects of gaps and splicing errors are minimized, resulting in high-quality photoresist patterns with splicing errors less than 1μm. Finally, a double-layer metal grating structure was obtained through pattern transfer. Performance tests show that the micro-polarizer array achieves a maximum transmittance of over 50% and an extinction ratio exceeding 15dB in the 3-15μm wavelength range. This exploration offers a low-cost, high-efficiency path for fabricating micro-polarizer arrays. |
| title | Contact-interference Hybrid lithography: Toward Scalable Fabrication of cross-scale periodic micro structure and demonstration on infrared micro polarizer array |
| topic | Optics |
| url | https://arxiv.org/abs/2410.12573 |