Flexible binary phase photon sieves on polyimide substrates by laser ablation

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

doi:10.1364/ol.43.002368

Cited by 14 publications

(4 citation statements)

References 19 publications

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“…The focused spot size (1/2 diameter) was measured as 27.16 ± 0.48 μm, which is slightly smaller than the Airy disk diameter for an ideal aperture of the same PS size [1,16]. The PS focusing efficiency was 6.85 ± 0.05%, within the limit of ~ 11% for a binary phase PS [14]. Note that the efficiency is slightly lower than another binary phase PS due to the reduced pinhole density (i.e., patterned area), which results in a slight increase in stray light and reduces focusing efficiency.…”

Section: Optical Propertiesmentioning

confidence: 87%

“…PS can separate a light detection and ranging laser source signal with orbital angular momentum from sunlight contamination [9,10]. It is attractive for ultrathin, miniaturized, flexible, and ultra-lightweight optical devices [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…This traditional PS has low light transmission efficiency, less than 25% of the incident light due to its dominant non-pinhole area. To overcome the low transmission problem of the traditional PS, a binary PS was developed [8,14]. However, this binary PS is not easy to fabricate because different PS sizes at a micro and nanometer scale need to be manufactured [18].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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.

View full text Add to dashboard Cite

show abstract

“…Many photon sieve imaging systems have been developed at visible, UV, and x-ray wavelengths, to show diffraction-limited imaging performance [1,3,4,[8][9][10][11][15][16][17][18][19][20][21][22][23][24]. Design of generalized photon sieves has also been studied such as to increase transmission efficiency [25,26] and create structured beams at their foci [2,[27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Analytical Fresnel imaging models for photon sieves

Oktem¹,

Kamalabadi²,

Davila³

2018

Opt. Express

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Photon sieves are a fairly new class of diffractive lenses that open unprecedented possibilities for high resolution imaging and spectroscopy, especially at short wavelengths such as UV and x-rays. In this paper, we model and analyze the image formation process of photon sieves using Fourier optics. We derive closed-form Fresnel imaging models that relate an input object to the image formed by a photon sieve system, both for coherent and incoherent illumination. These analytical models also provide a closed-form expression for the point-spread function of the system for both in-focus and out-of-focus cases. All the formulas are expressed in terms of Fourier transforms and convolutions, which enable easy interpretation as well as fast computation. The derived analytical models provide a unified framework to effectively develop new imaging modalities enabled by diffractive lenses and analyze their imaging capabilities for different design configurations, prior to physical production. To illustrate their utility and versatility, the derived formulas are applied to several important special cases such as photon sieves with circular holes and pixelated diffractive lenses generated by SLM-type devices. The analytical image formation models presented in this paper provide a generalizable and powerful means for effective analysis and simulation of any imaging system with a diffractive lens, including Fresnel zone plates, Fresnel phase plates, and other modified Fresnel lenses and masklike patterns such as coded apertures.

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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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Flexible binary phase photon sieves on polyimide substrates by laser ablation

Cited by 14 publications

References 19 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

Analytical Fresnel imaging models for photon sieves

High‐Efficiency Multilevel Phase Lenses with Nanostructures on Polyimide Membranes

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