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A metalens-based analog computing system for ultrasonic Fourier transform calculations.

Robert Frederik Uy1, Viet Phuong Bui2

  • 1Hwa Chong Institution, Singapore, 269734, Singapore. robertfrederikduy@gmail.com.

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This study introduces the Ultrasonic Fourier Transform Analog Computing System (UFT-ACS), a novel metalens-based device for accurate analog Fourier transforms using ultrasonic waves, overcoming limitations of optical and acoustic methods.

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Area of Science:

  • Physics
  • Computer Science
  • Engineering

Background:

  • Wave-based analog computing offers a potential alternative to digital systems.
  • Existing optical analog Fourier transformers face phase retrieval challenges.
  • Low-frequency acoustic analog transformers are too bulky for chip integration.

Purpose of the Study:

  • To present a novel Ultrasonic Fourier Transform Analog Computing System (UFT-ACS).
  • To address the limitations of current analog Fourier transform technologies.
  • To demonstrate accurate Fourier transform calculations using ultrasonic waves.

Main Methods:

  • Development of a metalens-based analog computer utilizing ultrasonic waves.
  • Wave propagation simulations performed using MATLAB.
  • Analysis of parameter selection for error minimization, including zero padding, truncation, and bandlimiting.

Main Results:

  • The UFT-ACS successfully calculates Fourier transforms of various input functions.
  • High accuracy was demonstrated through wave propagation simulations.
  • Optimal parameters for minimizing errors were identified and discussed.

Conclusions:

  • The UFT-ACS presents a viable solution for analog Fourier transform calculations.
  • Ultrasonic waves offer advantages over optical and low-frequency acoustic methods for this application.
  • The proposed system shows promise for integration into compact computing systems.