ArticleNanophotonics (Berlin, Germany)2023
Inverse design and optical vortex manipulation for thin-film absorption enhancement.
Article in Nanophotonics (Berlin, Germany), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Inverse Design of Thermal Imaging Metalens Achieving 100° Field of View on a 4 × 4 Microbolometer Array.Micromachines · 2025Article
- Research on the Generation of High-Purity Vortex Beams Aided by Genetic Algorithms.Nanomaterials (Basel, Switzerland) · 2025Article
- Spin-orbit coupling in van der Waals materials for optical vortex generation.Light, science & applications · 2025Article
- Time-domain adjoint optimization for metalens design toward enhanced broadband efficiency and uniformity.iScience · 2025Article
- Inverse Design of Ultrathin Metamaterial Absorber.Nanomaterials (Basel, Switzerland) · 2025Article
- Freeform thin-film lithium niobate mode converter for photon-pair generation.Nanophotonics (Berlin, Germany) · 2025Article
- Inverse design of color routers in CMOS image sensors: toward minimizing interpixel crosstalk.Nanophotonics (Berlin, Germany) · 2024Article
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Authors and funding
6 authors.
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Abstract
Optical vortices (OVs) have rapidly varying spatial phase and optical energy that circulates around points or lines of zero optical intensity. Manipulation of OVs offers innovative approaches for various fields, such as optical sensing, communication, and imaging. In this work, we demonstrate the correlation between OVs and absorption enhancement in two types of structures. First, we introduce a simple planar one-dimensional (1D) structure that manipulates OVs using two coherent light sources. The structure shows a maximum of 6.05-fold absorption gap depending on the presence of OVs. Even a slight difference in the incidence angle can influence the generation/annihilation of OVs, which implies the high sensitivity of angular light detection. Second, we apply inverse design to optimize two-dimensional (2D) perfect ultrathin absorbers. The optimized free-form structure achieves 99.90 % absorptance, and the fabricable grating structure achieves 97.85 % at 775 nm wavelength. To evaluate OV fields and their contribution to achieving absorption enhancement, we introduce a new parameter, OV circularity. The optimized structures generate numerous OVs with a maximum circularity of 95.37 % (free-form) and 96.14 % (grating), superior to our 1D structure. Our study reveals the role of high-circularity localized OVs in optimizing nano-structured absorbers and devices for optical sensing, optical communication, and many other applications.
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