Photon sieves for creating and identifying orbital angular momentum of light

Asmolova, Olha; Andersen, Geoff; Anderson, Matthew E.; Cumming, M. A.

doi:10.1117/12.2249626

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…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]. Photon sieves have been mostly used with monochromatic sources [1,9,10] because of their wavelength-dependent focal length.…”

Section: Introductionmentioning

confidence: 99%

“…These analytical models and point-spread functions are crucial for effective development, design, and analysis of the new imaging modalities enabled by photon sieves, prior to their physical production. In particular, the implications of various design choices, such as different hole shapes [43], pixelization [28], and apodization [30], on imaging attributes can be readily analyzed and simulated. 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.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical Fresnel imaging models for photon sieves

Oktem¹,

Kamalabadi²,

Davila³

2018

Opt. Express

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

2018

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Flexible binary phase photon sieves on polyimide substrates by laser ablation

2018

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A binary phase diffractive optical element photon sieve is fabricated by direct laser ablation of a thin, flexible polyimide substrate with a nanosecond-pulsed ultraviolet laser. The binary phase photon sieve operates at 633 nm and was designed with 19 rings and a focal length of 400 mm. The total time to fabricate the photon sieves was tens of seconds. The surface properties of the laser-processed areas are examined, and the optical performance of the photon sieve is characterized and compared to FDTD simulations. By optimizing the laser fluence and travel distance between laser pulses, features with sub-wavelength surface roughness were achieved. The photon sieve showed good focusing ability with suppressed side-lobes. When the fractional area of photon sieve pinholes was made to approach 50%, the binary sieve diffraction efficiency approached 11%, matching the highest value reported in the literature for a photon sieve. Thus, this Letter demonstrates both high efficiency and lightweight diffractive optics suitable for space satellite and other applications, with capabilities for low cost and high throughput fabrication.

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Photon sieves for creating and identifying orbital angular momentum of light

Cited by 3 publications

References 8 publications

Analytical Fresnel imaging models for photon sieves

Analytical Fresnel imaging models for photon sieves

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

Flexible binary phase photon sieves on polyimide substrates by laser ablation

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