Elastic suppression in Brillouin imaging by destructive interference

被引:49
作者
Antonacci, Giuseppe [1 ]
Lepert, Guillaume [1 ]
Paterson, Carl [1 ]
Toeroek, Peter [1 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Blackett Lab, London SW7 2BZ, England
基金
英国工程与自然科学研究理事会;
关键词
SCATTERING; MICROSCOPY;
D O I
10.1063/1.4927400
中图分类号
O59 [应用物理学];
学科分类号
摘要
Brillouin microscopy is an emerging technique to yield high spatial resolution mechanical images in a non-contact manner. The main challenge in Brillouin spectroscopy is given by the detection and the localisation of the Brillouin peaks, in particular, when a high amount of elastic light is collected. We demonstrate a purely interferometric method to suppress the parasitic light which overwhelms the Brillouin spectrum using destructive interference in a Michelson interferometer. A suppression ratio of 35 dB is readily achieved. Both double and single stage virtually imaged phased array spectrometers are tested showing that the Brillouin peaks can still be measured when the intensity of the elastic light is higher by 53 dB, hence, enabling 3D mechanical imaging of thin biological systems such as cells. (C) 2015 AIP Publishing LLC.
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页数:3
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