Spectral broadening in Brillouin imaging
Spectral broadening in Brillouin imaging
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DOI：
10.1063/1.4836477
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发表时间：
2013-11-25
影响因子：
4
通讯作者：
Toeroek, Peter
中科院分区：
文献类型：
--
作者：
Antonacci, Giuseppe;Foreman, Matthew R.;Toeroek, Peter
布里渊显微镜是一种新兴的成像模式，以非接触的方式提供有关介质的机械特性的基本信息。迄今为止，由于在较高NA下布里渊频谱的显著角展宽，已经使用低数值孔径（NA）光学器件。在这项工作中，我们从理论和实验上研究了布里渊成像的光谱展宽效应对系统NA的依赖性，对于90度和180度散射几何形状。线形变形和增宽被发现在后向散射几何形状中被最小化，从而为高分辨率体内机械成像铺平了道路。(C)2013 AIP Publishing LLC.
Brillouin microscopy is an emerging imaging modality that provides fundamental information about mechanical properties of media in a non-contact manner. To date, low numerical aperture (NA) optics have been used, due to noticeable angular broadening of the Brillouin spectrum at higher NAs. In this work, we investigate theoretically and experimentally the dependence of spectral broadening effects in Brillouin imaging on system NA, for both 90 degrees and 180 degrees scattering geometries. Lineshape deformations and broadening are found to be minimised in a backscattering geometry, hence paving the way for high resolution in-vivo mechanical imaging. (C) 2013 AIP Publishing LLC.