Journal article
Effect of experimental parameters on wavefront-shaping-assisted bidirectional focusing in opaque media
Journal of applied physics, Vol.131(21), p.213103
06/07/2022
Handle:
https://hdl.handle.net/2376/122817
Abstract
Recently, we developed a technique to perform wavefront-shaping-assisted bidirectional focusing in opaque media, which has applications in performing subsurface spectroscopy of heterogeneous materials. In this study, we report in detail the effects of different experimental parameters on the function of this technique. Namely, we consider the effects of target depth, sample positioning, objective spacing, and initial intensity [e.g., signal-to-noise ratio (SNR)]. From these measurements, we find that all four parameters affect the performance of the bidirectional focusing microscope, but the most significant ones are the target depth and the sample/objective spacings. The SNR is found to only be significant for small SNRs as our system functions optimally for initial SNRs [Formula: see text] (intensities [Formula: see text] larger than the background). The observed importance of the sample/objective spacings demonstrates that the enhancement depends strongly on the incident beams’ spot sizes. We also estimate that the bidirectional focusing microscope can improve focusing on subsurface particles up to a depth of [Formula: see text] mean free paths (which is 1170 [Formula: see text]m for our samples).
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Details
- Title
- Effect of experimental parameters on wavefront-shaping-assisted bidirectional focusing in opaque media
- Creators
- Benjamin R. Anderson - Washington State UniversityNatalie Gese - Washington State UniversityHergen Eilers - Washington State University
- Publication Details
- Journal of applied physics, Vol.131(21), p.213103
- Academic Unit
- Institute for Shock Physics
- Identifiers
- 99900876937901842
- Language
- English
- Resource Type
- Journal article