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Single planar photonic chip with tailored angular transmission for multiple-order analog spatial differentiator.

Yang Liu1, Mingchuan Huang1, Qiankun Chen1

  • 1Advanced Laser Technology Laboratory of Anhui Province, Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.

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|December 26, 2022
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Summary

A novel dielectric multilayer chip performs analog spatial differentiation for enhanced edge detection in imaging. This multifunctional chip enables higher-order differentiations, advancing optical imaging and computing applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Computational Imaging

Background:

  • Analog spatial differentiation is crucial for edge-based enhancement in various applications.
  • Existing methods often require structural changes to achieve different differentiation orders.

Purpose of the Study:

  • To propose and demonstrate a multifunctional planar chip for analog spatial differentiation.
  • To achieve first- to fourth-order spatial differentiations using a single, structurally invariant chip.
  • To enhance optical imaging systems by integrating the chip as a substrate.

Main Methods:

  • Fabrication of a planar chip from dielectric multilayers.
  • Experimental demonstration of first-, second-, third-, and fourth-order spatial differentiation.
  • Theoretical analysis to explain experimental observations and predict further capabilities.

Main Results:

  • The chip successfully performed first- and second-order spatial differentiation without parameter changes.
  • Third- and fourth-order differentiations were experimentally realized for the first time.
  • Integration into imaging systems enhanced edges in optical amplitude and phase images.

Conclusions:

  • The proposed dielectric multilayer chip offers versatile analog spatial differentiation capabilities.
  • This thin, multifunctional chip expands the functionality of standard microscopes for optical imaging.
  • The wave-based analog computing ability presents new opportunities in optical imaging and computing.