[1] [1] Koski K J, Yarger J L. Brillouin imaging[J]. Appl Phys Lett, 2005, 87(6): 061903.

[2] [2] Liptak D C, Reber J C, Maguire J F, et al. On the development of a confocal Rayleigh-Brillouin microscope[J]. Rev Sci Instrum, 2007, 78(1): 016106.

[3] [3] Scarcelli G, Yun S H. Confocal Brillouin microscopy for three-dimensional mechanical imaging[J]. Nat Photonics, 2008, 2(1): 39-43.

[4] [4] Scarcelli G, Yun S H. In vivo Brillouin optical microscopy of the human eye[J]. Opt Express, 2012, 20(8): 9197-9202.

[5] [5] Palombo F, Madami M, Stone N, et al. Mechanical mapping with chemical specificity by confocal Brillouin and Raman microscopy[J]. The Analyst, 2014, 139(4): 729-733.

[6] [6] Zhao W Q, Tan J B, Qiu L R. Bipolar absolute differential confocal approach to higher spatial resolution[J]. Opt Express, 2004, 12(21): 5013-5021.

[7] [7] Zhao W Q, Tan J B, Qiu L R. Tri-heterodyne confocal microscope with axial superresolution and higher SNR[J]. Opt Express, 2004, 12(21): 5191-5197.

[8] [8] Yamaguchi M, Yagi T, Azuhata T, et al. Brillouin scattering study of gallium nitride: elastic stiffness constants[J]. J Phys: Condens Matter, 1997, 9(1): 241-248.

[9] [9] Yamaguchi M, Yagi T, Sota T, et al. Brillouin scattering study of bulk GaN[J]. J Appl Phys, 1999, 85(12): 8502-8504.

[10] [10] Wang Z K, Lim H S, Ng S C, et al. Brillouin scattering study of low-frequency bulk acoustic phonons in multilayer graphene[J]. Carbon, 2008, 46(15): 2133-2136.

[11] [11] Sandercock J R, Wettling W. Light scattering from surface and bulk thermal magnons in iron and nickle[J]. J Appl Phys, 1979, 50(B11): 7784-7789.

[12] [12] Sandercock J R, Wettling W. Light scattering from thermal magnons in iron and nickel[J]. IEEE Trans Magn, 1978, 14(5): 442-444.

[13] [13] Koski K J, Akhenblit P, McKiernan K, et al. Non-invasive determination of the complete elastic moduli of spider silks[J]. Nature Materials, 2013, 12(3): 262-267.

[14] [14] Zhang Cong, Yu Wenfeng, Li Zhenglin, et al. Numerical study on scattering properties for the stimulated Brillouin scattering fiber[J]. Acta Optica Sinica, 2015, 35(3): 0319005.

[15] [15] Feng Jing, He Xingdao, Wu Tao, et al. An experiment system measuring the spontaneous Raleigh-Brillouin scattering line profiles of gas[J]. Laser & Optoelectronics Progress, 2014, 51(7): 072901.