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Optimized virtual optical waveguides enhance light throughput in scattering media

Author

Listed:
  • Adithya Pediredla

    (Carnegie Mellon University
    Dartmouth College, United States of America (work done during Pediredla’s time at CMU))

  • Matteo Giuseppe Scopelliti

    (Carnegie Mellon University)

  • Srinivasa Narasimhan

    (Carnegie Mellon University)

  • Maysamreza Chamanzar

    (Carnegie Mellon University)

  • Ioannis Gkioulekas

    (Carnegie Mellon University)

Abstract

Ultrasonically-sculpted gradient-index optical waveguides enable non-invasive light confinement inside scattering media. The confinement level strongly depends on ultrasound parameters (e.g., amplitude, frequency), and medium optical properties (e.g., extinction coefficient). We develop a physically-accurate simulator, and use it to quantify these dependencies for a radially-symmetric virtual optical waveguide. Our analysis provides insights for optimizing virtual optical waveguides for given applications. We leverage these insights to configure virtual optical waveguides that improve light confinement fourfold compared to previous configurations at five mean free paths. We show that virtual optical waveguides enhance light throughput by 50% compared to an ideal external lens, in a medium with bladder-like optical properties at one transport mean free path. We corroborate these simulation findings with real experiments: we demonstrate, for the first time, that virtual optical waveguides recycle scattered light, and enhance light throughput by 15% compared to an external lens at five transport mean free paths.

Suggested Citation

  • Adithya Pediredla & Matteo Giuseppe Scopelliti & Srinivasa Narasimhan & Maysamreza Chamanzar & Ioannis Gkioulekas, 2023. "Optimized virtual optical waveguides enhance light throughput in scattering media," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40864-z
    DOI: 10.1038/s41467-023-40864-z
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    References listed on IDEAS

    as
    1. Maysamreza Chamanzar & Matteo Giuseppe Scopelliti & Julien Bloch & Ninh Do & Minyoung Huh & Dongjin Seo & Jillian Iafrati & Vikaas S. Sohal & Mohammad-Reza Alam & Michel M. Maharbiz, 2019. "Ultrasonic sculpting of virtual optical waveguides in tissue," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
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