Picosecond time-resolved surface-lattice temperature probe

Journal Article · Mon Oct 08 04:00:00 EDT 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.103378· OSTI ID:6147539

Elsayed-Ali, H E; Herman, J W ^[1]

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1. Laboratory for Laser Energetics, University of Rochester, Rochester, NY (USA)

Picosecond reflection high-energy electron diffraction is used as a time-resolved surface-lattice temperature probe. A picosecond laser pulse is split into two beams. The first interacts with the sample. The second activates the cathode of an electron gun creating a collimated and focused electron pulse that is well synchronized with the heating laser pulse. The electron pulse is used to generate a reflection high-energy electron diffraction pattern of the sample. Since heating results in an intensity reduction of the elastically scattered electrons (Debye--Waller effect), the diffraction pattern provides information on the surface temperature as well as structure. Time-resolved measurements of the picosecond laser-heated surface show general agreement with a heat diffusion model.

• DOE Contract Number: FG02-88ER45376
• OSTI ID: 6147539
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 57:15; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

440800* -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
COHERENT SCATTERING
DEBYE-WALLER FACTOR
DIFFRACTION
ELECTROMAGNETIC RADIATION
ELECTRON DIFFRACTION
ELECTRON GUNS
LASER RADIATION
PULSE TECHNIQUES
RADIATIONS
RESOLUTION
SCATTERING
SURFACES
TIME RESOLUTION
TIMING PROPERTIES