Characterization of two-photon photopolymerization fabrication using high-speed optical diffraction tomography

He, Yanping; Shao, Qi; Chen, Shih‐Chi; Zhou, Renjie

doi:10.1016/j.addma.2022.103293

Cited by 11 publications

(8 citation statements)

References 35 publications

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“…[ 769 ] The general outlook is that advanced tools that can be implemented as augmentations to classical and widespread bright field transmission microscopes will become more widespread. The high speed optical equipment such as optical diffraction tomography, [ 770 ] and X‐ray computed tomography [ 771 ] offering non‐destructive and 3D characterization of the produced object is also of critical importance for the advancement of the TPL technique.…”

Section: Challenges and Perspectivementioning

confidence: 99%

Two‐Photon Polymerization Lithography for Optics and Photonics: Fundamentals, Materials, Technologies, and Applications

Wang

Zhang

Ladika

et al. 2023

Adv Funct Materials

113

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The rapid development of additive manufacturing has fueled a revolution in various research fields and industrial applications. Among the myriad of advanced three-dimensional printing techniques, two-photon polymerization lithography (TPL) uniquely offers a significant electron microscope (SEM) images of SMP structures before and after programming and after recovery, respectively. Reproduced under terms of the CC-BY license. [114] Copyright 2021, The Authors, published by Nature Publishing Group. b) Stiff SMPs for high-resolution reversible nanophotonics. I-II) The deformed and recovered nanopillars under optical microscope and SEM, respectively. Reproduced with permission. [115] Copyright 2022, American Chemical Society. c) Vapor-responsive photonic arrays. I-IV) Optical image of a grid array in air, in water vapors ~ 20 s, saturation with water vapors ~ 88s, and after the gas flow stopped, respectively.Reproduced under terms of the CC-BY license. [116] Copyright 2021, The Authors, published by Royal Society of Chemistry. d) SEM image of a 40-layer face-cantered-cubic photonic structure printed by SU-8. Reproduced with permission. [117] Copyright 2004, Nature Publishing Group. e) SEM image of helices with an axial pitch of 800 nm and a radius of 800 nm fabricated by the two-step absorption photoresist. Reproduced with permission. [118]

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Section: Challenges and Perspectivementioning

confidence: 99%

Two‐Photon Polymerization Lithography for Optics and Photonics: Fundamentals, Materials, Technologies, and Applications

Wang

Zhang

Ladika

et al. 2023

Adv Funct Materials

113

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“…A number of digital holographic microscopes have been designed, developed and successfully commercialized [103][104][105][106]. Some recent developments include, dual wavelength Fresnel biprism-based configuration [107], and Blu-Ray pickup-based configuration [108] which are applied to different biomedicine and industrial applications [33,[109][110][111].…”

Section: Applications Of Single-shot Digital Holographymentioning

confidence: 99%

Emerging scientific and industrial applications of digital holography: an overview

Kumar,

Dwivedi

2023

Eng. Res. Express

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Holography is a technique to record and reconstruct three dimensional (3D) information without mandating lenses. Digital holography (DH) provides direct access to the complex amplitude of the reconstructed wavefront. This feature differentiates DH from other imaging techniques and enables it to provide quantitative information of the object under investigation. Advancements in technologies of digital image sensors, coherent sources, and computation algorithms and hardware, has paved the way of digital holographic systems for industrial applications. This work presents an overview of the scientific and industrial applications where DH can play an important role. Few of the applications of digital holographic systems in the industrial and scientific areas including microscopy, non-destructive testing, displays, environment, cloud and ocean studies are discussed.

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“…In recent years, optical coherence tomography (OCT) and optical diffraction tomography (ODT) have been used for in-situ diagnostics during multi-photon laser printing. – OCT has been demonstrated as a fast in-situ diagnostic tool that can detect specular reflection (or back-scattering) resulting from the refractive index difference between the polymerized material and the monomer . However, this method is effective only for imaging surfaces that are strictly perpendicular to the optical axis, unless the structure has an additional refractive-index inhomogeneity.…”

Section: Introductionmentioning

confidence: 99%

“…ODT is an angle-scanning approach that measures a 2D scattered field and reconstructs it into a 3D refractive index distribution based on certain approximations, typically Born or Rytov. 11,12 Although ODT is a fast 3D reconstruction method, it suffers from the so-called missing cone artifacts and the fact that the inverse problem is mathematically ill-posed. 13,14 These issues significantly deteriorate the quality of the reconstruction, especially for thick samples, and generally do not allow recovery of 3D refractive index distributions for 3D laser-printed specimens.…”

Section: ■ Introductionmentioning

confidence: 99%

“…However, this method is effective only for imaging surfaces that are strictly perpendicular to the optical axis, unless the structure has an additional refractive-index inhomogeneity. ODT is an angle-scanning approach that measures a 2D scattered field and reconstructs it into a 3D refractive index distribution based on certain approximations, typically Born or Rytov. , Although ODT is a fast 3D reconstruction method, it suffers from the so-called missing cone artifacts and the fact that the inverse problem is mathematically ill-posed. , These issues significantly deteriorate the quality of the reconstruction, especially for thick samples, and generally do not allow recovery of 3D refractive index distributions for 3D laser-printed specimens . Furthermore, both techniques are interferometric and require highly complex optical setups.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In-situ Quantitative Phase Imaging during Multi-photon Laser Printing

Zvagelsky,

Kiefer,

Weinacker

et al. 2023

ACS Photonics

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Shape optimization of microstructures such as microlenses and diffractive optical elements fabricated by multiphoton laser printing is routinely performed by optical characterization after completing printing and development (ex situ). It is, however, highly desirable, instead of or in addition, to optically characterize the samples during the printing process before development (in situ). Here, we successfully demonstrate the integration of in-situ quantitative phase imaging into a commercial multi-photon laser printer. In terms of hardware, this integration merely requires adding illumination by a collimated LED and a small aperture to the existing beam path. In terms of software, we use well-established reconstruction algorithms based on a stack of through-focus, wide-field optical images acquired within a few seconds. We verify this approach by inspecting the topography of various microoptical elements printed with different photoresists and comparing the results with ex-situ measurements obtained by using a spinning-disk confocal optical microscope.

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Characterization of two-photon photopolymerization fabrication using high-speed optical diffraction tomography

Cited by 11 publications

References 35 publications

Two‐Photon Polymerization Lithography for Optics and Photonics: Fundamentals, Materials, Technologies, and Applications

Two‐Photon Polymerization Lithography for Optics and Photonics: Fundamentals, Materials, Technologies, and Applications

Emerging scientific and industrial applications of digital holography: an overview

In-situ Quantitative Phase Imaging during Multi-photon Laser Printing

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