Waveguide writing using a train of femtosecond laser pulses at 850 nm, in the transparent spectral region of bulk As40S60 glasses is reported. Waveguides were written by translating the glass sample along the optical axis of a strongly focussed laser beam. Refractive index variation, linear absorption spectra, and Raman spectra of the exposed region were measured. The chemical mechanism responsible for the index variation has been correlated to a breakage of the glass' As-S bonds and formation of As-As and S-S bonds and increase of the "disorder" of the glass network. The nonlinear optical origin leading to this phenomenon has been shown, and possible mechanisms are discussed.
Bibliographical noteFunding Information:
The authors would like to thank the group of Dr. Alain Villeneuve for useful discussions. We also acknowledge the assistance of Dr. George I. Stegeman and his group for many valuable discussions. This work was carried out through support from the University of Central Florida, CREOL, a Collaborative Grant from the NSERC (Natural Science and Engineering Research Council) of Canada, and DRET (France) grant number 93.811.00.091.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Computer Science(all)
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Electrical and Electronic Engineering