Abstract

This paper shows that it is possible in principle to implement low-threshold power limitation in ionic-covalent crystals with adsorbed metal-cluster-dye-molecule structures that possess sensitized anti-Stokes luminescence. The power-limitation effect for radiation with λ=660nm has been detected and investigated at a temperature of 77K for AgCl(I) nanocrystals 40-70nm in size with adsorbed dye molecules and few-atom clusters of silver, dispersed in a gelatine matrix. The effect was observed for radiation with a density of 10<sup>17</sup>-10<sup>19</sup>quant/cm<sup>2</sup>sec at a pulse width of 1ms. The Z-scanning technique was used to establish that the main limitation mechanism is self-focusing, which results from variation of the refractive index of the medium when the electron concentration on traps in the band gap of the nanocrystals varies.

© 2009 Optical Society of America

PDF Article

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