Abstract
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 language | English |
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Title of host publication | Photons Plus Ultrasound |
Subtitle of host publication | Imaging and Sensing 2013 |
Volume | 8581 |
DOIs | |
Publication status | Published - 28 May 2013 |
Externally published | Yes |
Event | Photons Plus Ultrasound: Imaging and Sensing 2013 - San Francisco, CA, United States Duration: 3 Feb 2013 → 5 Feb 2013 |
Conference
Conference | Photons Plus Ultrasound: Imaging and Sensing 2013 |
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Country/Territory | United States |
City | San Francisco, CA |
Period | 3/02/13 → 5/02/13 |
Keywords
- 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