Measurement of the time-resolved reflection matrix for enhancing light energy delivery into a scattering medium

Youngwoon Choi, Timothy R. Hillman, Wonjun Choi, Niyom Lue, Ramachandra R. Dasari, Peter T.C. So, Wonshik Choi, Zahid Yaqoob

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38 Citations (Scopus)


Multiple scatterings occurring in a turbid medium attenuate the intensity of propagating waves. Here, we propose a method to efficiently deliver light energy to the desired target depth in a scattering medium. We measure the time-resolved reflection matrix of a scattering medium using coherent time-gated detection. From this matrix, we derive and experimentally implement an incident wave pattern that optimizes the detected signal corresponding to a specific arrival time. This leads to enhanced light delivery at the target depth. The proposed method will lay a foundation for efficient phototherapy and deep-tissue in vivo imaging in the near future.

Original languageEnglish
Article number243901
JournalPhysical review letters
Issue number24
Publication statusPublished - 2013 Dec 9


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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