Interaction of picosecond optical pulses with high /ital T//sub /ital c// superconducting films

Journal Article · Mon Jun 12 04:00:00 EDT 1989 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.101538· OSTI ID:6258342

Donaldson, W R; Kadin, A M; Ballentine, P H; Sobolewski, R

Infrared pulses (1.06 ..mu..m wavelength, approx.150 ps long) from a Nd:YAG laserilluminated a superconducting YBa/sub 2/Cu/sub 3/O/sub 7/ granular film, 0.7 ..mu..m thick.This caused the film to switch from the superconducting to the normal(resistive) state in less than 2 ns, followed by a much slower recovery /similar to/1..mu..s. The initial fast switching may be explained by nonequilibrium hot-electronenergy transfer from the top absorbing layer (approx.100 nm thick) through the film,followed by an essentially bolometric response and cooldown via equilibriumthermal conduction out of the film.

• Research Organization: Laboratory for Laser Energetics and Department of Electrical Engineering, University of Rochester, Rochester, New York 14627(US)
• OSTI ID: 6258342
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 54:24; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
EQUIPMENT
FILMS
HEAT TRANSFER
LASER RADIATION
LASERS
NEODYMIUM LASERS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SOLID STATE LASERS
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SWITCHES
THERMAL CONDUCTION
TRANSITION ELEMENT COMPOUNDS
USES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES