4.1 Article

Metalens for improving optical coherence tomography

期刊

JOURNAL OF THE KOREAN PHYSICAL SOCIETY
卷 81, 期 1, 页码 32-37

出版社

KOREAN PHYSICAL SOC
DOI: 10.1007/s40042-022-00492-0

关键词

Metalens; Optical coherence tomography; Extended depth-of-focus; High-resolution imaging

资金

  1. Major Project of Basic and Applied Basic Research Foundation of Guangdong Province [2020B0301030009]
  2. National Natural Science Foundation of China [11974436, 12074444]
  3. Basic and Applied Basic Research Foundation of Guangdong Province [2020B1515020019, 2020A1515011184]
  4. Basic and Applied Basic Research Foundation of Guangzhou [202102020987]
  5. Innovation Group Project of Southern Marine Science and Engineering (Guangdong)

向作者/读者索取更多资源

A silicon metalens is proposed and designed to enhance the depth of focus and resolution requirements of the optical coherence tomography system for imaging human corneas.
Optical coherence tomography is one of the most attractive new tomographic techniques, especially in the detection and imaging of biological tissues. For the detection and imaging of human corneas, the current ultra-high-resolution optical coherence tomography technology faces the challenge that the depth of focus is too short to scan the entire human cornea in a single amplitude scan. Here, we propose and design a silicon metalens to replace the objective lens in the sample arm of the optical coherence tomography system. In our simulation, a uniform focused beam with a depth of focus of 886 mu m, an axial resolution of 3.1 mu m and a lateral resolution of 2.2 mu m can be generated by the metalens, which is under the excitation of broadband Gaussian light with wavelength coverage from 800 to 900 nm. This metalens fully satisfies the depth of focus and resolution requirements of the ultra-high-resolution optical coherence tomography system for human corneas, hence expands the application of optical coherence tomography in medical science for the benefit of mankind.

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