High-efficiency time-reversed ultrasonically encoded optical focusing using a large-area photorefractive polymer

Yuta Suzuki, Puxiang Lai, Xiao Xu, Lihong V. Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Time-reversed ultrasonically encoded (TRUE) optical focusing focuses light beyond one transport mean free path by phase-conjugating the ultrasonically tagged light. However, in previous works, only a small portion of the tagged light was phase-conjugated by using a photorefractive Bi12SiO 20 crystal, due to its small active area (1×1 cm2). In this work, we report high-efficiency TRUE focusing using a large-area photorefractive polymer (5×5 cm2), which demonstrated ∼40 times increase in focused energy. Further, we imaged absorbers embedded in a turbid sample of thickness of ∼12 transport mean free paths.
Original languageEnglish
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2013
Publication statusPublished - 28 May 2013
Externally publishedYes
EventPhotons Plus Ultrasound: Imaging and Sensing 2013 - San Francisco, CA, United States
Duration: 3 Feb 20135 Feb 2013


ConferencePhotons Plus Ultrasound: Imaging and Sensing 2013
Country/TerritoryUnited States
CitySan Francisco, CA


  • optical focusing
  • optical imaging
  • phase conjugation
  • photorefractive material
  • time reversal
  • ultrasound modulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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