Aperture-modulated Diffusers (AMDs)

Herzig, Hans Peter; Kipfer, Peter

doi:10.1007/978-3-540-48886-6_16

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…These diffusers scatter the light monotonically over a very large scattering angle (up to ≈ 140 • ). DOEs that are used as diffusers [6], beam splitters [7,8] or for flat-top beamshaping applications [9,10] are well established. They can be used to distribute the intensity uniformly over a given number of diffraction orders.…”

Section: Introductionmentioning

confidence: 99%

Optical and THz Galois diffusers

Jaax

Wolff

Laegel

et al. 2013

J. Eur. Opt. Soc.-Rapid Publ.

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Binary surface reliefs with sub-wavelength features making up a pseudorandom pattern based on mathematical Galois fields GF(p m) [1, 2] can scatter incoming waves into a large number of diffraction maxima within a huge solid angle. A one-dimensional (1D) Galois number sequence can be folded into a two-dimensional (2D) array by the sino-representation [2]. This concept was been verified for acoustic waves a long time ago [3, 4] and is investigated here for visible light and THz waves. Our Galois diffusers are designed as reflection reliefs and realised by electron beam lithography for the optical regime and UV photolithography for the THz regime. Our results show that optical and THz Galois surfaces are excellent diffusers for electromagnetic waves; they distribute the reflected intensity evenly over a large number of maxima nearly within the entire half solid angle in the backward direction.

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Section: Introductionmentioning

confidence: 99%

Optical and THz Galois diffusers

Jaax

Wolff

Laegel

et al. 2013

J. Eur. Opt. Soc.-Rapid Publ.

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Low-data simulation of diffractive optical elements based on the zones geometry

Ripoll

Kettunen

Herzig

2002

Journal of Modern Optics

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Abstract.Design and simulation of two-dimensional di ractive optical elements are often limited by the amount of data required to represent the element in the computer's memory. We present a technique based on a geometrical description of the element, which requires fewer data than the traditional pixel description. Moreover, the element is being described more accurately and consequently the pixel-related artefacts are suppressed. This technique can be used for both periodic and non-periodic structures of large dimensions under Fraunhofer or Fresnel approximations. We apply the method to analysis of far-®eld beam-shaping elements and discuss possible extensions and re®nements of the technique.

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Micro-Optics: Fundamentals and Recent Topics

Herzig

2004

Free and Guided Optical Beams

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Aperture-modulated Diffusers (AMDs)

Cited by 3 publications

References 4 publications

Optical and THz Galois diffusers

Optical and THz Galois diffusers

Low-data simulation of diffractive optical elements based on the zones geometry

Micro-Optics: Fundamentals and Recent Topics

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