3D mapping of intensity field about the focus of a micrometer–scale parabolic mirror

McDonald, Alison; McConnell, Gail; Cox, D. C.; Riis, Erling; Griffin, Paul F.

doi:10.1364/oe.23.002375

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…In our experiment, we introduced the two optical lenses which had different radii of curvatures (45.61 and 123.17 mm, Table 1). The randomly distributed nanostructures were uniformly formed on these Figure 4c, the position of maximum peak intensity of SF11 DARCs lens is not changed, compared to the SF11 bare lens (vertical dashed line), which indicates the identical focal length [28]. In addition, the enhancement ratio was calculated by the DARCs peak intensity divided by the bare peak intensity, which displayed how the transmission at the center was more efficiently enhanced, up to 30%.…”

Section: Imaging Properties Of Fabricated Single Lensmentioning

confidence: 89%

Double-Sided Anti-Reflection Nanostructures on Optical Convex Lenses for Imaging Applications

et al. 2019

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Anti-reflection coatings (ARCs) from the cornea nipple array of the moth-eye remarkably suppress the Fresnel reflection at the interface in broadband wavelength ranges. ARCs on flat glass have been studied to enhance the optical transmittance. However, little research on the implementation of ARCs on curved optical lenses, which are the core element in imaging devices, has been reported. Here, we report double-sided, bio-inspired ARCs on bi-convex lenses with high uniformity. We theoretically optimize the nanostructure geometry, such as the height, period, and morphology, since an anti-reflection property results from the gradually changed effective refractive index by the geometry of nanostructures. In an experiment, the transmittance of an ARCs lens increases up to 10% for a broadband spectrum without distortion in spot size and focal length. Moreover, we demonstrate ~30% improved transmittance of an imaging system composed of three bi-convex lenses, in series with double-sided ARCs (DARCs).

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Section: Imaging Properties Of Fabricated Single Lensmentioning

confidence: 89%

Double-Sided Anti-Reflection Nanostructures on Optical Convex Lenses for Imaging Applications

et al. 2019

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“…This uses the angular spectrum of the field, ( 0 ( )  ), and the Helmholtz propagator, , such that 30]. We use this method, following the details in [29], and references therein, to complete the design algorithm shown in figure 3; firstly, a target intensity is calculated and then propagated backwards, using equation (2), by the focal length. The phase of the resulting electric field in this plane is rounded to the desired bit depth, as discussed later in the text.…”

Section: Simulation Methodsmentioning

confidence: 99%

“…y for an electric field with wave vector k = 2π/λ [29,30]. We use this method, following the details in [29], and references therein, to complete the design algorithm shown in figure 3; firstly, a c) a)…”

Section: Simulation Methodsmentioning

confidence: 99%

Comparative simulations of Fresnel holography methods for atomic waveguides

et al. 2016

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We have simulated the optical properties of micro-fabricated Fresnel zone plates (FZPs) as an alternative to spatial light modulators for producing non-trivial light potentials to trap atoms within a lensless Fresnel arrangement. We show that binary (1 bit) FZPs with wavelength (1 μm) spatial resolution consistently outperform kinoforms of spatial and phase resolution comparable to commercial SLMs in root mean square error comparisons, with FZP kinoforms demonstrating increasing improvement for complex target intensity distributions. Moreover, as sub-wavelength resolution microfabrication is possible, FZPs provide an exciting possibility for the creation of static cold-atom trapping potentials useful to atomtronics, interferometry, and the study of fundamental physics.

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“…The effect of imaging light interacting with periodic BEC fringes can be modelled by Fourier-propagating the light waves, based on the initial conditions of the field immediately after the condensate, then performing the inverse Fourier transform to convert back to real space [48][49][50][51]. Propagation effects inside the BEC are neglected as the condensate size in the beam propagation direction is considerably smaller than the Talbot period.…”

Section: Talbot Effect: Theory and Experimentsmentioning

confidence: 99%

Talbot-enhanced, maximum-visibility imaging of condensate interference

Zhai¹,

Carson²,

Henderson³

et al. 2018

Optica

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Nearly two centuries ago Talbot first observed the fascinating effect whereby light propagating through a periodic structure generates a ‘carpet’ of image revivals in the near field. Here we report the first observation of the spatial Talbot effect for light interacting with periodic Bose-Einstein condensate interference fringes. The Talbot effect can lead to dramatic loss of fringe visibility in images, degrading precision interferometry, however we demonstrate how the effect can also be used as a tool to enhance visibility, as well as extend the useful focal range of matter wave detection systems by orders of magnitude. We show that negative optical densities arise from matter-wave induced lensing of detuned imaging light – yielding Talbot-enhanced single-shot interference visibility of > 135% compared to the ideal visibility for resonant light

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3D mapping of intensity field about the focus of a micrometer–scale parabolic mirror

Cited by 5 publications

References 23 publications

Double-Sided Anti-Reflection Nanostructures on Optical Convex Lenses for Imaging Applications

Double-Sided Anti-Reflection Nanostructures on Optical Convex Lenses for Imaging Applications

Comparative simulations of Fresnel holography methods for atomic waveguides

Talbot-enhanced, maximum-visibility imaging of condensate interference

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