Theoretical Analysis of a Novel Ultrasound Generator on an Optical Fiber Tip

被引：9

作者：

Wu, Nan ^{[1
]}

Wang, Wenhui ^{[1
]}

Tian, Ye ^{[1
]}

Guthy, Charles ^{[1
]}

Wang, Xingwei ^{[1
]}

机构：

[1] Univ Mass Lowell, Dept Elect & Comp Engn, Lowell, MA USA

来源：

FIBER OPTIC SENSORS AND APPLICATIONS VII | 2010年 / 7677卷

关键词：

ultrasound; gold nanoparticle; photo-acoustics; optical fiber; gold nanosphere; GOLD NANOPARTICLES; INTRAVASCULAR ULTRASOUND; SPECTRAL-ANALYSIS; ABSORPTION; DYNAMICS; PLAQUE; SHAPE;

D O I：

10.1117/12.852210

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

A novel ultrasound generator consisting of a single mode optical fiber with a layer of gold nanoparticles on its tip has been designed. The generator utilizes the optical and photo-acoustic properties of gold nanoparticles. When heated by laser pulses, a thin absorption layer made up of these nanoparticles at the cleaved surface of a single mode fiber generates a mechanical shock wave caused by thermal expansion. Mie's theory was applied in a MATLAB simulation to determine the relationship between the absorption efficiency and the optical resonance wavelengths of a layer of gold nanospheres. Results showed that the absorption efficiency and related resonance wavelengths of gold nanospheres varied based on the size of the gold nanosphere particles. In order to obtain the bandwidths associated with ultrasound, another MATLAB simulation was run to study the relationship between the power of the laser being used, the size of the gold nanosphere, and the energy decay time. The results of this and the previous simulation showed that the energy decay time is picoseconds in length.

引用

页数：7

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