High-NA achromatic metalenses by inverse design
- Title
- High-NA achromatic metalenses by inverse design
- Author
- 정해준
- Issue Date
- 2020-03
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS EXPRESS, v. 28, no. 5, page. 6945-6965
- Abstract
- We use inverse design to discover metalens structures that exhibit broadband, achromatic focusing across low, moderate, and high numerical apertures. We show that standard unit-cell approaches cannot achieve high-efficiency high-NA focusing, even at a single frequency, due to the incompleteness of the unit-cell basis, and we provide computational upper bounds on their maximum efficiencies. At low NA, our devices exhibit the highest theoretical efficiencies to date. At high NA-of 0.9 with translation-invariant films and of 0.99 with "freeform" structures-our designs are the first to exhibit achromatic high-NA focusing. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
- URI
- https://opg.optica.org/oe/fulltext.cfm?uri=oe-28-5-6945&id=427796https://repository.hanyang.ac.kr/handle/20.500.11754/175128
- ISSN
- 1094-4087
- DOI
- 10.1364/OE.385440
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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