Abstract

The high laser damage thresholds often reported for porous thin films are discussed in terms of point defects or small absorbing inclusions as sites of thin-film damage initiation. The model is based on the internal pressure built up upon laser heating at short times. The competing effects of short pressure relaxation distances and low thermal conductivity inherent in porous films are discussed. The model predicts that at thicknesses less than or equal to the neck or column diameter of a porous film, the effect of lower thermal conductivity should dominate and cause the films to exhibit lower laser damage thresholds than their denser counterparts.

© 1993 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Effect of defects on long-pulse laser-induced damage of two kinds of optical thin films

Bin Wang, Yuan Qin, Xiaowu Ni, Zhonghua Shen, and Jian Lu
Appl. Opt. 49(29) 5537-5544 (2010)

Absorption and thermal conductivity of oxide thin films measured by photothermal displacement and reflectance methods

Z. L. Wu, M. Reichling, X.-Q. Hu, K. Balasubramanian, and K. H. Guenther
Appl. Opt. 32(28) 5660-5665 (1993)

Thermal conductivities of thin, sputtered optical films

C. H. Henager and W. T. Pawlewicz
Appl. Opt. 32(1) 91-101 (1993)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (8)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription