Accession Number:

ADP011540

Title:

Spectroscopic Studies of Bulk As2S3 Glasses and Amorphous Films Doped with Dy, Sm and Mn

Descriptive Note:

Corporate Author:

NATIONAL INST OF MATERIALS PHYSICS BUCHAREST (ROMANIA)

Report Date:

2001-06-01

Pagination or Media Count:

12.0

Abstract:

The effect of rare earth Dy and Sm and transition metal Mn luminescent impurities on the optical properties of As2S3 glass is studied in a wide spectra region. The Raman, infrared, band-to-band and edge absorption spectroscopies are employed to obtain information about the incorporation of impurity ions in the host glass structure and the corresponding changes in intrinsic optical characteristics. The effects of light-soaking and thermal treatment on the doped As2S3 glasses were examined as well. In the fundamental absorption region a reflectivity maximum at 2.98 eV shows blue Dy, Sm or red Mn shift depending on the electronegativity of the impurity, in accordance with the corresponding variations of the glass structure. Near the edge absorption the impurity affects strongly the slope and the magnitude of the weak absorption tail. In the wide range of transparency the addition of impurity suppresses several absorption bands indicating the interaction of dopants with the host glass contaminations. Some variations of the characteristic Raman spectra under light exposure and thermal aging of doped glasses were registered. The observed effects of metal dopants on the As2S3 glass are discussed in connection with the expected behavior of the impurities in the glass.

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Ceramics, Refractories and Glass
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE