Surface-relief Bragg grating waveguides based on IP-Dip polymer for photonic applications

Goraus, Matej; Pudiš, Dušan; Urbancová, Petra; Martinček, Ivan; Gaso, Peter

doi:10.1016/j.apsusc.2018.05.185

Cited by 11 publications

(7 citation statements)

References 16 publications

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“…Pillars in the NP2 array displayed an average enlargement of 45% in the x - y direction and shrinkage of ∼27% in the z -direction. The difference in measured dimensions from designed ones can be attributed to the shrinkage of IP-Dip post development ( Goraus et al, 2018 ) and the high sensitivity of sub-micrometric structures to the printing parameters as well as the hatching and slicing parameters. The main reason for this is the increase in the voxel size when using a higher laser power.…”

Section: Resultsmentioning

confidence: 99%

Two-Photon Polymerization of 2.5D and 3D Microstructures Fostering a Ramified Resting Phenotype in Primary Microglia

Sharaf

Roos

Timmerman

et al. 2022

Front. Bioeng. Biotechnol.

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Microglia are the resident macrophages of the central nervous system and contribute to maintaining brain’s homeostasis. Current 2D “petri-dish” in vitro cell culturing platforms employed for microglia, are unrepresentative of the softness or topography of native brain tissue. This often contributes to changes in microglial morphology, exhibiting an amoeboid phenotype that considerably differs from the homeostatic ramified phenotype in healthy brain tissue. To overcome this problem, multi-scale engineered polymeric microenvironments are developed and tested for the first time with primary microglia derived from adult rhesus macaques. In particular, biomimetic 2.5D micro- and nano-pillar arrays (diameters = 0.29–1.06 µm), featuring low effective shear moduli (0.25–14.63 MPa), and 3D micro-cages (volume = 24 × 24 × 24 to 49 × 49 × 49 μm3) with and without micro- and nano-pillar decorations (pillar diameters = 0.24–1 µm) were fabricated using two-photon polymerization (2PP). Compared to microglia cultured on flat substrates, cells growing on the pillar arrays exhibit an increased expression of the ramified phenotype and a higher number of primary branches per ramified cell. The interaction between the cells and the micro-pillar-decorated cages enables a more homogenous 3D cell colonization compared to the undecorated ones. The results pave the way for the development of improved primary microglia in vitro models to study these cells in both healthy and diseased conditions.

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Section: Resultsmentioning

confidence: 99%

Two-Photon Polymerization of 2.5D and 3D Microstructures Fostering a Ramified Resting Phenotype in Primary Microglia

Sharaf

Roos

Timmerman

et al. 2022

Front. Bioeng. Biotechnol.

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Section: Waveguide Materials For Fsdlwmentioning

confidence: 99%

“…In 2018, Goraus et al. [ 100 ] presented a new IP‐Dip surface‐relief Bragg grating (SR‐BG) prepared on high pillars via FsDLW (Figure 8f). Transmission spectral characteristic shows Bragg wavelength at 1543 nm, what nearly coincides with the proposed wavelength at 1550 nm.…”

Section: Waveguide Materials For Fsdlwmentioning

confidence: 99%

“…Up to now, different materials have been utilized to microfabricate optical waveguides via FsDLW, such as dielectric crystals, [56,57,67] glasses, [85,97] polymers, [63,96,98] and two-photon photoresists. [99][100][101][102] Different materials will exhibit their own performance advantages. This section mainly introduces some common materials that can be fabricated by FsDLW and their applicable scenes.…”

Section: Waveguide Materials For Fsdlwmentioning

confidence: 99%

“…[74,75] IP-Dip and SU-8 are the most common two-photon photoresists based on two-photon absorption, which have been utilized to fabricate various devices. [99][100][101][102]143]…”

Section: Two-photon Absorption Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

Optical Waveguides Fabricated via Femtosecond Direct Laser Writing: Processes, Materials, and Devices

Cao

Qiu

et al. 2023

Adv Materials Technologies

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As the most fundamental unit of photonic integration, optical waveguides offer the possibility of developing efficient and practical photonic chips by facilitating the on‐chip integration of devices with different functions. Femtosecond direct laser writing (FsDLW), as a burgeoning 3D microfabrication technology, can realize the rapid formation of arbitrary optical waveguides without any mask inside versatile materials, such as crystalline dielectric crystals, glasses, polymers, and photoresists. This significant material‐independence allows FsDLW to combine different materials and manufacturing processes to implement a cross‐platform solution. This review first describes the different optical loss types and suitable measurement methods for different applicable scenes, then summarizes the two fabrication mechanisms and points out the general direction for adjusting the waveguide properties by fabrication processes. Finally, the application fields and development prospects of different materials are discussed by overviewing the characteristics of different materials and the material selection preferences of different devices. With a panoramic view of the development, it is concluded with insights and perspectives of the future development of optical waveguides and processing technology via FsDLW.

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Highly sensitive magnetic field microsensor based on direct laser writing of fiber-tip optofluidic Fabry–Pérot cavity

Zhang

Wei

et al. 2020

APL Photonics

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Surface-relief Bragg grating waveguides based on IP-Dip polymer for photonic applications

Cited by 11 publications

References 16 publications

Two-Photon Polymerization of 2.5D and 3D Microstructures Fostering a Ramified Resting Phenotype in Primary Microglia

Two-Photon Polymerization of 2.5D and 3D Microstructures Fostering a Ramified Resting Phenotype in Primary Microglia

Optical Waveguides Fabricated via Femtosecond Direct Laser Writing: Processes, Materials, and Devices

Highly sensitive magnetic field microsensor based on direct laser writing of fiber-tip optofluidic Fabry–Pérot cavity

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