Role of electric field strength in laser damage of dielectric multilayers

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:7343455

Apfel, J H; Matteucci, J S; Newnam, B E; Gill, D H

The intensity of the local electric field within a multilayer illuminated by a laser beam is determined by the vector addition of forward and reverse flowing waves as a result of interference. The profile of the electric field intensity will therefore depend upon the multilayer design and can have a peak value which is more or less than the peak field of the incident beam. Four multilayer designs were examined, each composed of approximately equal numbers of high and low index films arranged so that the electric field profiles are significantly different. Laser damage thresholds for these coatings were compared with calculated electric field strength profiles. For electron-gun evaporated titania/silica coatings damaged by 30 picosecond pulses of 1.064 ..mu..m radiation the damage threshold is dictated by electric field intensity in the titania layers.

• Research Organization: Los Alamos Scientific Lab., N.Mex. (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 7343455
• Report Number(s): LA-UR-76-1593; CONF-760724-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
BINARY MIXTURES
CHALCOGENIDES
DIELECTRIC MATERIALS
DISPERSIONS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
FILMS
IRRADIATION
LASER RADIATION
LAYERS
MINERALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
PULSED IRRADIATION
RADIATION EFFECTS
RADIATIONS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS