Microscopic second harmonic generation (SHG) from tilt-placed collagen fibrils

被引：5

作者：

Chang, Ying ^{[1
]}

Wei, Huajiang ^{[1
]}

Jin, Ying ^{[1
]}

Liu, Hanping ^{[1
]}

Deng, Xiaoyuan ^{[1
,2
]}

机构：

[1] S China Normal Univ, MOE Key Lab Laser Life Sci, Guangzhou 510631, Guangdong, Peoples R China

[2] S China Normal Univ, Res Resources Ctr, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Peoples R China

来源：

GENERAL PHYSIOLOGY AND BIOPHYSICS | 2011年 / 30卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Linearly polarization; Fibrils orientation; Strength of SHG electric field and power; POLARIZATION; ORIENTATION; MOLECULES; MYOSIN;

D O I：

10.4149/gpb_2011_02_175

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We report a theoretical study of second-harmonic generation (SHG) from the collagen fibrils which have a tilt angle Phi between their axes with the plane of the polarization angle alpha of the linearly polarized focused light. The effects of Phi as well as alpha on SHG emission have been investigated. Our results show that the total strength of SHG electrical field (E-2 omega) and power (P-2 omega) reach their maximal values as Phi locates at a certain angle, here it is around 27 degrees under all demonstrated alpha. When Phi < 27 degrees, E-2 omega and P-2 omega gradually increase to their maximal value, while when Phi > 27 degrees, they quickly drops. Specially, E-2 omega and P-2 omega are almost undetectable when Phi >= 45 degrees. Also, Phi influences the distribution pattern of E-2 omega, P-2 omega and their parallel (E-2 omega,E-p, P-2 omega,P-p) and perpendicular (E-2 omega,E-s, P-2 omega,P-s) components, such as the number of emission lobes and shape. alpha has unevenly impact on E-2 omega and P-2 omega, the far deviation of alpha from x axis induce much great decrease of E-2 omega and P-2 omega. alpha = 45 degrees has special influence on the distribution pattern of E-2 omega,E-s, E-2 omega, P-2 omega,P-s as well as P-2 omega compared to those of alpha = 0 degrees and 90 degrees.

引用

页码：175 / 185

页数：11

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