Charge transfer states in GeO2-doped silicate fiber-optic waveguides and their role in second-harmonic generation |
| |
Authors: | B P Antonyuk V N Denisov B N Mavrin |
| |
Affiliation: | (1) Institute of Spectroscopy, Russian Academy of Sciences, 142092 Troitsk, Moscow Region, Russia |
| |
Abstract: | The concentration dependence of the broad-band luminescence arising in GeO2-doped silicate fiber-optic waveguides is measured and interpreted. The spectra obtained show that electronic excitations
of a new type that are absent in pure silicate glass — charge transfer excitons — arise in the doped system. Under the action
of light an electron can be transferred both from a Ge center into the host and between Ge centers. Self-organization of these
excitations in the field of a light wave (orientational ordering of their dipole moments) results in the appearance of a macroscopic
electric field that destroys the initial centrosymmetry of the system and allows second-harmonic generation.
Pis’ma Zh. éksp. Teor. Fiz. 68, No. 10, 737–740 (25 November 1998) |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|