Relationship between laser-induced gratings and vibrational properties of Eu-doped glasses

Journal Article · Sun Mar 15 04:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.4109· OSTI ID:6810055

Durville, F M; Behrens, E G; Powell, R C

Four-wave-mixing techniques have been shown previously to produce permanent refractive index gratings in Eu-doped glasses by resonant excitation of the Eu/sup 3+/ ions. A variety of glass hosts were studied and it was found that permanent holographic gratings could be established in some of these but not in others. We report here an extension of our previous work which includes investigations of new materials, attempts to form gratings with different excitation wavelengths, and a comparison of the Raman and resonant Raman spectra of glasses which do and do not exhibit permanent holographic gratings. It was found that direct excitation into the /sup 5/D/sub 0/ level did not produce permanent gratings. It was also found that glasses which do exhibit permanent gratings have high-frequency vibrational modes which couple strongly to the Eu/sup 3+/ ions. These results help to verify the model proposed previously to explain the origin of the holographic grating in terms of structural changes caused by thermal effects arising from radiationless relaxation through high-frequency local modes.

• Research Organization: Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078-0444
• OSTI ID: 6810055
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:8; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALLOYS
CHARGED PARTICLES
DOPED MATERIALS
ENERGY-LEVEL TRANSITIONS
EUROPIUM ADDITIONS
EUROPIUM ALLOYS
EUROPIUM IONS
EXCITATION
GLASS
GRATINGS
IONS
LASERS
LATTICE VIBRATIONS
MATERIALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
REFRACTIVITY
RELAXATION
RESONANCE
TEMPERATURE EFFECTS