Metasurface-based bijective illumination collection imaging provides high-resolution tomography in three dimensions

Masoud Pahlevaninezhad, Yao Wei Huang, Majid Pahlevani, Brett Bouma, Melissa J. Suter, Federico Capasso, Hamid Pahlevaninezhad*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Microscopic imaging in three dimensions enables numerous biological and clinical applications. However, high-resolution optical imaging preserved in a relatively large depth range is hampered by the rapid spread of tightly confined light due to diffraction. Here, we show that a particular disposition of light illumination and collection paths liberates optical imaging from the restrictions imposed by diffraction. This arrangement, realized by metasurfaces, decouples lateral resolution from the depth of focus by establishing a one-to-one correspondence (bijection) along a focal line between the incident and collected light. Implementing this approach in optical coherence tomography, we demonstrate tissue imaging at a wavelength of 1.3 µm with ~3.2 µm lateral resolution, maintained nearly intact over a 1.25 mm depth of focus, with no additional acquisition or computational burden. This method, termed bijective illumination collection imaging, is general and might be adapted across various existing imaging modalities.

Original languageEnglish
Pages (from-to)203–211
Number of pages9
JournalNature Photonics
StatePublished - 14 Feb 2022


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