“Two-Pass” Brillouin Scattering Geometry for the Investigation of Opto-Acoustic Properties of Thin Films

“Two-Pass” Brillouin Scattering Geometry for the Investigation of Opto-Acoustic Properties of Thin Films
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用于研究薄膜光声特性的“双通道”布里渊散射几何

DOI:
10.1143/jjap.42.5865
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发表时间:
2003
影响因子:
1.5
通讯作者:
N. Ohtori
N. Ohtori
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Kenzo Hisa;M. Matsukawa;N. Ohtori

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提出了一种用于薄膜布里渊散射测量的新光学几何结构。利用聚焦在样品上的两束入射激光束,同时进行 90A 散射和背向散射测量。光谱中的强散射峰使得能够同时测量高超声速波速和折射率。实际上,在超拉伸过程中,随着双折射率的增加,连续观察到聚丙烯(PP)薄膜中各向异性的出现。
A new optical geometry for Brillouin scattering measurement of thin films is proposed. Making use of the two incident laser beams focused on the sample, simultaneous measurements of 90A scattering and back scattering were performed. The strong scattering peaks in the spectra enabled simultaneous measurements of hypersonic wave velocity and refractive index. Actually, the appearance of anisotropy in the polypropylene (PP) film was continuously observed as an increase of birefringence during the ultra-drawing process.
Hisa、Matsukawa、Otani、Huey、Briggs、Ohtori:“通过布里渊散射法在拉伸应力下测量聚合物薄膜的双折射”Jpn.J.Appl.Phys..(已接受)。
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