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3D printable diffractive optical elements by liquid immersion
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DOI：10.1038/s41467-021-23279-6.png)
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Abstract
En 中文
Diffractive optical elements (DOEs) are used to shape the wavefront of incident light. This can be used to generate practically any pattern of interest, albeit with varying efficiency. A fundamental challenge associated with DOEs comes from the nanoscale-precision requirements for their fabrication. Here we demonstrate a method to controllably scale up the relevant feature dimensions of a device from tens-of-nanometers to tens-of-microns by immersing the DOEs in a near-index-matched solution. This makes it possible to utilize modern 3D-printing technologies for fabrication, thereby significantly simplifying the production of DOEs and decreasing costs by orders of magnitude, without hindering performance. We demonstrate the tunability of our design for varying experimental conditions, and the suitability of this approach to ultrasensitive applications by localizing the 3D positions of single molecules in cells using our microscale fabricated optical element to modify the point-spread-function (PSF) of a microscope. Diffractive optical elements are broadly used due to their ability to reshape the wavefront efficiently and conveniently. By using liquid immersion, the authors here enable microscale 3D-printed optics to behave like nanoscopic structures while maintaining high performance.
Keywords:
IMPLEMENTATION
LOCALIZATION
MICROSCOPY
SYSTEM
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