Abstract

The refractive index of evaporated PbI2 films, in the red region of the visible spectrum, can be reduced up to 18% by exposure to 488 nm light at film temperatures of 150–180 °C. Absorption in the same region remains very small throughout the process, until a temperature-dependent exposure threshold is reached, then rises rapidly due to scattering by photolysis-produced Pb agglomerates. For exposures below this threshold, localized band-gap states and/or bounded-plasma effects in the small Pb agglomerates give rise to an absorption band at 520 < λ < 580 nm, which causes the large refractive-index change. The photolysis in the polycrystalline films is uniform through the film rather than concentrated near the free surface, as in single crystals.

© 1975 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
On the origin of the large refractive index change in photolyzed PbI2 films*

A. B. Buckman and N. H. Hong
J. Opt. Soc. Am. 67(8) 1123-1125 (1977)

Laser action and photoexcitations dynamics in PbI2 films

C.-X. Sheng, Y. Zhai, E. Olejnik, C. Zhang, D. Sun, and Z.V. Vardeny
Opt. Mater. Express 5(3) 530-537 (2015)

Composition dependence of the photoinduced refractive-index change in lead silicate glasses

X.-C. Long and S. R. J. Brueck
Opt. Lett. 24(16) 1136-1138 (1999)

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 (5)

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