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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6429–6438

Finite element modeling of bulk ultrasonic waves generated by ring-shaped laser illumination in a diamond anvil cell

Wen Feng, Dexing Yang, Yuning Guo, and Ying Chang  »View Author Affiliations


Optics Express, Vol. 20, Issue 6, pp. 6429-6438 (2012)
http://dx.doi.org/10.1364/OE.20.006429


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Abstract

Thermoelastic finite element models are established to study the bulk ultrasonic waves of an aluminum film generated by ring-shaped laser illumination in a diamond anvil cell. By analyzing the amplitudes of bulk ultrasonic waves arrived at the rear surface of film in detail, it shows that there exists strong enhancement effects on the central axis of the ring due to the constructive interference among the waves created by different parts of the ring source. The displacement distributions along the central axis indicate that the focal depth of shear wave is mainly determined by its directivity induced by a point-like laser source in a DAC system while it is more complicated to determine the focal depth of longitudinal wave. In particular, through changing the ring radius, we quantitatively demonstrate that the signal amplitudes generated by a ring source are far greater than those generated by a point-like source.

© 2012 OSA

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.3560) Lasers and laser optics : Lasers, ring
(350.5340) Other areas of optics : Photothermal effects
(280.3375) Remote sensing and sensors : Laser induced ultrasonics

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 11, 2012
Manuscript Accepted: February 19, 2012
Published: March 5, 2012

Citation
Wen Feng, Dexing Yang, Yuning Guo, and Ying Chang, "Finite element modeling of bulk ultrasonic waves generated by ring-shaped laser illumination in a diamond anvil cell," Opt. Express 20, 6429-6438 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-6-6429


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