Accession Number:

ADA285068

Title:

The Deposition of Electro-Optic Films on Semiconductors

Descriptive Note:

Final rept. 1 May 1993-30 Apr 1994

Corporate Author:

NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MATERIALS SCIENCE AND ENGINEERING

Report Date:

1994-09-26

Pagination or Media Count:

51.0

Abstract:

Highly epitaxial, dense potassium niobate thin films can be reproducibly grown on various substrates including magnesium oxide, magnesium spinel, and potassium tantalate by ion-beam sputter deposition. A strong correlation between lattice mismatch and epitaxial film quality can be made as films on potassium tantalate, which possess the lowest lattice mismatch, displayed the smallest amount of grain tilt. Lower optical losses were measured for thinner potassium niobate films as streak lengths of greater than 8 mm were observed. The dominant loss mechanism in these films can be attributed to volume scattering, possibly originating from twin domains or low angle grain boundaries. Second harmonic generation of green light has been demonstrated for these potassium niobate thin film planar waveguides both in the bulk and waveguide configurations.

Subject Categories:

  • Inorganic Chemistry
  • Electrical and Electronic Equipment
  • Electrooptical and Optoelectronic Devices
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE