scholarly journals High-speed time-reversed ultrasonically encoded (TRUE) optical focusing inside dynamic scattering media at 793 nm

2014 ◽  
Author(s):  
Yan Liu ◽  
Puxiang Lai ◽  
Cheng Ma ◽  
Xiao Xu ◽  
Yuta Suzuki ◽  
...  
Keyword(s):  
High Speed ◽  
Scattering Media ◽  
Optical Focusing ◽  
Dynamic Scattering

scholarly journals High-speed single-shot optical focusing through dynamic scattering media with full-phase wavefront shaping

2017 ◽  
Vol 111 (22) ◽  
pp. 221109 ◽  
Author(s):  
Ashton S. Hemphill ◽  
Yuecheng Shen ◽  
Yan Liu ◽  
Lihong V. Wang
Keyword(s):  
High Speed ◽  
Single Shot ◽  
Scattering Media ◽  
Wavefront Shaping ◽  
Optical Focusing ◽  
Dynamic Scattering

scholarly journals Focusing light into scattering media with ultrasound-induced field perturbation

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhongtao Cheng ◽  
Lihong V. Wang
Keyword(s):  
High Speed ◽  
Superior Performance ◽  
Single Shot ◽  
Scattering Media ◽  
Zeroth Order ◽  
Field Perturbation ◽  
Induced Field ◽  
Wavefront Shaping ◽  
Flexible Mechanism ◽  
Optical Focusing

AbstractFocusing light into scattering media, although challenging, is highly desirable in many realms. With the invention of time-reversed ultrasonically encoded (TRUE) optical focusing, acousto-optic modulation was demonstrated as a promising guidestar mechanism for achieving noninvasive and addressable optical focusing into scattering media. Here, we report a new ultrasound-assisted technique, ultrasound-induced field perturbation optical focusing, abbreviated as UFP. Unlike in conventional TRUE optical focusing, where only the weak frequency-shifted first-order diffracted photons due to acousto-optic modulation are useful, here UFP leverages the brighter zeroth-order photons diffracted by an ultrasonic guidestar as information carriers to guide optical focusing. We find that the zeroth-order diffracted photons, although not frequency-shifted, do have a field perturbation caused by the existence of the ultrasonic guidestar. By detecting and time-reversing the differential field of the frequency-unshifted photons when the ultrasound is alternately ON and OFF, we can focus light to the position where the field perturbation occurs inside the scattering medium. We demonstrate here that UFP optical focusing has superior performance to conventional TRUE optical focusing, which benefits from the more intense zeroth-order photons. We further show that UFP optical focusing can be easily and flexibly developed into double-shot realization or even single-shot realization, which is desirable for high-speed wavefront shaping. This new method upsets conventional thinking on the utility of an ultrasonic guidestar and broadens the horizon of light control in scattering media. We hope that it provides a more efficient and flexible mechanism for implementing ultrasound-guided wavefront shaping.

scholarly journals Optical focusing deep inside dynamic scattering media with near-infrared time-reversed ultrasonically encoded (TRUE) light

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Yan Liu ◽  
Puxiang Lai ◽  
Cheng Ma ◽  
Xiao Xu ◽  
Alexander A. Grabar ◽  
...  
Keyword(s):  
Near Infrared ◽  
Scattering Media ◽  
Optical Focusing ◽  
Dynamic Scattering

scholarly journals Optical encryption using uncorrelated characteristics of dynamic scattering media and spatially random sampling of a plaintext

2020 ◽  
Vol 28 (24) ◽  
pp. 36432
Author(s):  
Qing Han ◽  
Wenjing Zhao ◽  
Aiping Zhai ◽  
Zhirun Wang ◽  
Dong Wang
Keyword(s):  
Random Sampling ◽  
Scattering Media ◽  
Optical Encryption ◽  
Dynamic Scattering

scholarly journals Time-reversed magnetically controlled perturbation (TRMCP) optical focusing inside scattering media

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Zhipeng Yu ◽  
Jiangtao Huangfu ◽  
Fangyuan Zhao ◽  
Meiyun Xia ◽  
Xi Wu ◽  
...  
Keyword(s):  
Scattering Media ◽  
Optical Focusing

scholarly journals Non-invasive optical focusing inside strongly scattering media with linear fluorescence

2020 ◽  
Vol 116 (24) ◽  
pp. 241104
Author(s):  
Dayan Li ◽  
Sujit Kumar Sahoo ◽  
Huy Quoc Lam ◽  
Dong Wang ◽  
Cuong Dang
Keyword(s):  
Scattering Media ◽  
Non Invasive ◽  
Optical Focusing
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