The Menon Lab

Advancing Optics, Nanofabrication & Computation.



Multifocal multilevel diffractive lens by wavelength multiplexing.


Journal article


W. Jia, Dajun Lin, R. Menon, B. Sensale‐Rodriguez
Applied Optics, 2023

Semantic Scholar DOI PubMed
Cite

Cite

APA   Click to copy
Jia, W., Lin, D., Menon, R., & Sensale‐Rodriguez, B. (2023). Multifocal multilevel diffractive lens by wavelength multiplexing. Applied Optics.


Chicago/Turabian   Click to copy
Jia, W., Dajun Lin, R. Menon, and B. Sensale‐Rodriguez. “Multifocal Multilevel Diffractive Lens by Wavelength Multiplexing.” Applied Optics (2023).


MLA   Click to copy
Jia, W., et al. “Multifocal Multilevel Diffractive Lens by Wavelength Multiplexing.” Applied Optics, 2023.


BibTeX   Click to copy

@article{w2023a,
  title = {Multifocal multilevel diffractive lens by wavelength multiplexing.},
  year = {2023},
  journal = {Applied Optics},
  author = {Jia, W. and Lin, Dajun and Menon, R. and Sensale‐Rodriguez, B.}
}

Abstract

Flat lenses with focal length tunability can enable the development of highly integrated imaging systems. This work explores machine learning to inverse design a multifocal multilevel diffractive lens (MMDL) by wavelength multiplexing. The MMDL output is multiplexed in three color channels, red (650 nm), green (550 nm), and blue (450 nm), to achieve varied focal lengths of 4 mm, 20 mm, and 40 mm at these three color channels, respectively. The focal lengths of the MMDL scale significantly with the wavelength in contrast to conventional diffractive lenses. The MMDL consists of concentric rings with equal widths and varied heights. The machine learning method is utilized to optimize the height of each concentric ring to obtain the desired phase distribution so as to achieve varied focal lengths multiplexed by wavelengths. The designed MMDL is fabricated through a direct-write laser lithography system with gray-scale exposure. The demonstrated singlet lens is miniature and polarization insensitive, and thus can potentially be applied in integrated optical imaging systems to achieve zooming functions.


Share


Tools
Translate to