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High-contrast self-imaging with ordered optical elements

Naqavi, Ali and Herzig, Hans Peter and Rossi, Markus (2016) High-contrast self-imaging with ordered optical elements. Journal of the Optical Society of America B, 33 (11). pp. 2374-2382. ISSN 0740-3224. doi:10.1364/JOSAB.33.002374.

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Creating arbitrary light patterns has applications in various domains, including lithography, beam shaping, metrology, sensing, and imaging. We study the formation of high-contrast light patterns obtained by transmission through an ordered optical element based on self-imaging. By applying the phase-space method, we explain phenomena such as the Talbot and the angular Talbot effects. We show that the image contrast is maximum when the source is either a plane wave or a point source, and it has a minimum for a source with finite spatial extent. We compare these regimes and address some of their fundamental differences. Specifically, we prove that increasing the source divergence reduces the contrast for the plane wave illumination but increases it for the point source. Also, we show that to achieve high contrast with a point source, tuning the source size and its distance to the element is crucial. We furthermore indicate and explore the possibility of realizing highly complex light patterns using a periodic transmission element. These patterns can have more spots in the far field than the number of diffraction orders of the periodic element. We predict that the ultimate image contrast is smaller for a point source compared to a plane wave. Our simulations confirm that the smallest achievable spot size in the image is imposed by diffraction regardless of the imaging regime. Our research can be applied to similar domains, e.g., quantum systems.

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Additional Information:© 2016 Optical Society of America. Received 16 May 2016; revised 15 September 2016; accepted 2 October 2016; posted 3 October 2016 (Doc. ID 264917); published 27 October 2016. The authors thank Dr. Philipp Mueller for great discussions. This work has been supported by funding in the frame of the CTI project LIMA under project number 14777.1 PFNM-NM. Funding: Commission for Technology and Innovation (14777.1 PFNM-NM).
Funding AgencyGrant Number
Commission for Technology and Innovation (Switzerland)14777.1 PFNM-NM
Issue or Number:11
Classification Code:OCIS codes: (110.0110) Imaging systems; (070.0070) Fourier optics and signal processing; (050.0050) Diffraction and gratings.
Record Number:CaltechAUTHORS:20161121-110225101
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Official Citation:Ali Naqavi, Hans Peter Herzig, and Markus Rossi, "High-contrast self-imaging with ordered optical elements," J. Opt. Soc. Am. B 33, 2374-2382 (2016)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72197
Deposited By: Tony Diaz
Deposited On:21 Nov 2016 19:06
Last Modified:11 Nov 2021 04:57

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