Inverse design of photonic meta-structure for beam collimation in on-chip sensing
Abstract Designed or patterned structured surfaces, metasurfaces, enable the miniaturization of complex arrangements of optical elements on a plane. Most of the existing literature focuses on miniaturizing the optical detection; little attention is directed to on-chip optical excitation. In this wor...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2021-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-84841-2 |
| _version_ | 1818845098306174976 |
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| author | Robin Singh Yuqi Nie Mingye Gao Anuradha Murthy Agarwal Brian W. Anthony |
| author_facet | Robin Singh Yuqi Nie Mingye Gao Anuradha Murthy Agarwal Brian W. Anthony |
| author_sort | Robin Singh |
| collection | DOAJ |
| description | Abstract Designed or patterned structured surfaces, metasurfaces, enable the miniaturization of complex arrangements of optical elements on a plane. Most of the existing literature focuses on miniaturizing the optical detection; little attention is directed to on-chip optical excitation. In this work, we design a metasurface to create a planar integrated photonic source beam collimator for use in on-chip optofluidic sensing applications. We use an iterative inverse design approach in order to optimize the metasurface to achieve a target performance using gradient descent method. We then fabricate beam collimators and experimentally compare performance characteristics with conventional uniform binary grating-based photonic beam diffractors. The optimal design enhances the illumination power by a factor of 5. The reinforced beam is more uniform with 3 dB beam spot increased almost ~ 3 times for the same device footprint area. The design approach will be useful in on-chip applications of fluorescence imaging, Raman, and IR spectroscopy and will enable better multiplexing of light sources for high throughput biosensing. |
| first_indexed | 2024-12-19T05:24:15Z |
| format | Article |
| id | doaj.art-a6f86c6fe59f49838280cb9f8e6190df |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-19T05:24:15Z |
| publishDate | 2021-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-a6f86c6fe59f49838280cb9f8e6190df2022-12-21T20:34:25ZengNature PortfolioScientific Reports2045-23222021-03-0111111110.1038/s41598-021-84841-2Inverse design of photonic meta-structure for beam collimation in on-chip sensingRobin Singh0Yuqi Nie1Mingye Gao2Anuradha Murthy Agarwal3Brian W. Anthony4Department of Mechanical Engineering, Massachusetts Institute of TechnologyDepartment of Materials Science and Engineering, Massachusetts Institute of TechnologyDepartment of Electrical Engineering and Computer Science, Massachusetts Institute of TechnologyDepartment of Materials Science and Engineering, Massachusetts Institute of TechnologyDepartment of Mechanical Engineering, Massachusetts Institute of TechnologyAbstract Designed or patterned structured surfaces, metasurfaces, enable the miniaturization of complex arrangements of optical elements on a plane. Most of the existing literature focuses on miniaturizing the optical detection; little attention is directed to on-chip optical excitation. In this work, we design a metasurface to create a planar integrated photonic source beam collimator for use in on-chip optofluidic sensing applications. We use an iterative inverse design approach in order to optimize the metasurface to achieve a target performance using gradient descent method. We then fabricate beam collimators and experimentally compare performance characteristics with conventional uniform binary grating-based photonic beam diffractors. The optimal design enhances the illumination power by a factor of 5. The reinforced beam is more uniform with 3 dB beam spot increased almost ~ 3 times for the same device footprint area. The design approach will be useful in on-chip applications of fluorescence imaging, Raman, and IR spectroscopy and will enable better multiplexing of light sources for high throughput biosensing.https://doi.org/10.1038/s41598-021-84841-2 |
| spellingShingle | Robin Singh Yuqi Nie Mingye Gao Anuradha Murthy Agarwal Brian W. Anthony Inverse design of photonic meta-structure for beam collimation in on-chip sensing Scientific Reports |
| title | Inverse design of photonic meta-structure for beam collimation in on-chip sensing |
| title_full | Inverse design of photonic meta-structure for beam collimation in on-chip sensing |
| title_fullStr | Inverse design of photonic meta-structure for beam collimation in on-chip sensing |
| title_full_unstemmed | Inverse design of photonic meta-structure for beam collimation in on-chip sensing |
| title_short | Inverse design of photonic meta-structure for beam collimation in on-chip sensing |
| title_sort | inverse design of photonic meta structure for beam collimation in on chip sensing |
| url | https://doi.org/10.1038/s41598-021-84841-2 |
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