The role of electrostriction in the generation of acoustic waves by optical forces in water

被引：7

作者：

Astrath, N. G. C. ^{[1
]}

Anghinoni, B. ^{[1
]}

Flizikowski, G. A. S. ^{[1
]}

Zanuto, V. S. ^{[1
]}

Malacarne, L. C. ^{[1
]}

Baesso, M. L. ^{[1
]}

Pozar, T. ^{[2
]}

Razansky, D. ^{[3
,4
,5
]}

机构：

[1] Univ Estadual Maringa, Dept Phys, BR-87020900 Maringa, Brazil

[2] Univ Ljubljana, Fac Mech Engn, Ljubljana 1000, Slovenia

[3] Univ Zurich, Inst Biomed Engn, Fac Med, CH-8057 Zurich, Switzerland

[4] Univ Zurich, Inst Pharmacol & Toxicol, Fac Med, CH-8057 Zurich, Switzerland

[5] Swiss Fed Inst Technol, Inst Biomed Engn, Dept Informat Technol & Elect Engn, CH-8093 Zurich, Switzerland

来源：

PHOTOACOUSTICS | 2023年 / 29卷

关键词：

Electrostriction; Radiation forces; Photo-induced lensing effect; Pressure-transients; Kerr lens; LASER; EXCITATION; SOLIDS; SOUND; LIMIT;

D O I：

10.1016/j.pacs.2022.100445

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

We present semi-analytical solutions describing the spatiotemporal distributions of temperature and pressure inside low-absorbing dielectrics excited by tightly focused laser beams. These solutions are compared to measurements in water associated with variations of the local refractive index due to acoustic waves generated by electrostriction, heat deposition, and the Kerr effect at different temperatures. The experimental results exhibited an excellent agreement with the modeling predictions, with electrostriction being the dominant transient effect in the acoustic wave generation. Measurements at 4.0 degrees C show that the thermoelastic contribution to the optical signal is significantly reduced due to the low thermal expansion coefficient of water at this temperature.

引用

页数：7

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