High-efficiency flexible multilevel photon sieves by single-step laser-based fabrication and optical analysis

Julian, Matthew; MacDonnell, David; Gupta, Mool C.

doi:10.1364/ao.58.000109

Cited by 14 publications

(4 citation statements)

References 14 publications

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“…However, it shows higher focusing efficiency than the previous membrane PS with a single-level pattern [11][12][13]. The efficiency can be improved by increasing pinhole density and modifying pinhole structures like multilevel PS [33].…”

Section: Optical Propertiesmentioning

confidence: 89%

“…2 Schematic diagram of the fabrication process for a micronano structure molding method as the tested wavelength. In this study, the selected wavelength is 532 nm, and the refractive index on the incident axis (z-axis) of CNF film at 532 nm is 1.55 [33]. Thus, d is 484 nm at k = 0.…”

Section: Fabrication Of Cnf-psmentioning

confidence: 99%

“…The imaging capability of the CNF-PS was demonstrated using the same setup but with a scattering object (a 3 × 3 array of holes in a thin, nearly opaque, silver film) placed in the incident laser path beam as shown in Fig. S2 in the Supplementary Information [33]. The spot diameter in the 3 × 3 array is 87 μm, with a center-to-center distance of 115 μm.…”

Section: Characterizationmentioning

confidence: 99%

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Transparent and Flexible Photon Sieve Made with Cellulose Nanofiber by Micro-Nano Structure Molding

Zhai

Panicker

Kim

et al. 2021

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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Conventionally, the photon sieve (PS) was made of chrome-coated fused silica and quartz plates. However, fused silica and quartz plates have a size limitation due to their weight and fragility. A membrane PS is attractive since it is lightweight, large size, flexibility and deployable. This paper demonstrates the new concept of membrane PS based on cellulose nanofiber (CNF). The CNF-based PS (CNF-PS) is transparent, flexible, lightweight, and has high strength and toughness. This study highlights the PS fabrication on a CNF film using a micro-nano structure molding technique and its structural stability in an external environmental change. For the first time in literature, through a high vacuum (5 × 10 -8 Torr) environment test, it was shown that CNF has emerged as a promising optical material. Furthermore, the prepared CNF-PS exhibited high beam quality. This study explained the complete research strategy from the isolation of cellulose nanofibers to its PS application. The new concept of CNF-PS will accelerate its broad application to thin and compact photonic devices.

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Section: Optical Propertiesmentioning

confidence: 89%

Section: Fabrication Of Cnf-psmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Transparent and Flexible Photon Sieve Made with Cellulose Nanofiber by Micro-Nano Structure Molding

Zhai

Panicker

Kim

et al. 2021

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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“…1: A summary of various PDLs. Adapted with permission from[20,24,29,30,37,59,66,[68][69][70][71][72] …”

mentioning

confidence: 99%

Investigations into flexible ultrathin multi-level micro-optics using femtosecond laser pulses

Low¹

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Radius of curvature rm Radii at m th integer ωo Beam waist Chapter Research and development of micro-optics patterning platform As discussed in the previous chapters, the combination of GO and FsLDW is promising in many aspects to realise the required highly flexible patterning with simple and low-cost fabrication method for the manufacturing of laser-induced reduced graphene oxide (LIRGO) micro-optics. This chapter presents the research and development of a micro-optics patterning platform which act as the enabler to manufacture LIRGO micro-optics. In particular, the critical components of the platform, such as the laser source, optical components, opto-mechanical devices, and control systems are explained. The detailed methods and formulae used to calibrate and interface the electronic hardware are discussed.

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High‐Efficiency Multilevel Phase Lenses with Nanostructures on Polyimide Membranes

Howe,

Rajapaksha,

Ellepola

et al. 2024

Advanced Optical Materials

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The emergence of planar meta‐lenses on flexible materials has profoundly impacted the long‐standing perception of diffractive optics. Despite their advantages, these lenses still face challenges in design and fabrication to obtain high focusing efficiency and resolving power. A nanofabrication technique is demonstrated based on photolithography and polyimide casting for realizing membrane‐based multilevel phase‐type Fresnel zone plates (FZPs) with high focusing efficiency. By employing advantageous techniques, these lenses with nanostructures are directly patterned into thin polyimide membranes. The computational and experimental results have indicated that the focusing efficiency of these nanostructures at the primary focus increases significantly with increasing the number of phase levels. Specifically, 16‐level phase lenses on a polyimide membrane can achieve a focusing efficiency of more than 91.6% of the input signal (9.5 times better than that of a conventional amplitude‐type FZP) and focus light into a diffraction‐limited spot together with very weak side‐lobes. Furthermore, these lenses exhibit considerably reduced unwanted diffraction orders and produce extremely low background signals. The potential impact of these lenses extends across various applications and techniques including microscopy, imaging, micro‐diffraction, remote sensing, and space flight instruments which require lightweight and flexible configurations.

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High-efficiency flexible multilevel photon sieves by single-step laser-based fabrication and optical analysis

Cited by 14 publications

References 14 publications

Transparent and Flexible Photon Sieve Made with Cellulose Nanofiber by Micro-Nano Structure Molding

Transparent and Flexible Photon Sieve Made with Cellulose Nanofiber by Micro-Nano Structure Molding

Investigations into flexible ultrathin multi-level micro-optics using femtosecond laser pulses

High‐Efficiency Multilevel Phase Lenses with Nanostructures on Polyimide Membranes

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