By Topic

Linear dichroism in photochromic CaF2

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
D. Staebler ; RCA Laboratories and Princeton Univ., Princeton, NJ, USA ; S. Schnatterly ; W. Zernik

Photochromic switching of additively colored La, Ce, Gd, or Tb doped CaF2with linearly polarized UV light and subsequent thermal decay of other photochromic effects leads to a linear dichroism of the two major absorption bands, band 1 (∼4000 Å) and band 2 (∼6000 Å), of the thermally stable state. The dichroism is due to a net reorientation of an anisotropic center having a symmetry axis that can lie along any one of the four \langle 111\rangle crystal directions. The photochromically active band, band 1, is shown to be due to an absorption dipole in the direction of the symmetry axis, while band 2 is due to two orthogonal absorption dipoles perpendicular to the symmetry axis. The direction of the symmetry axis and the character of the absorption bands suggest an F center perturbed by a rare earth replacing a nearest neighbor Ca. A possibility remains, however, that the center is more complex.

Published in:

IEEE Journal of Quantum Electronics  (Volume:4 ,  Issue: 10 )