| dc.contributor.author |
Poletkin, Kirill V. |
| dc.contributor.author |
Gurzadyan, Gagik G. |
| dc.contributor.author |
Shang, J. |
| dc.contributor.author |
Kulish, Vladimir. |
| dc.date.accessioned |
2012-02-15T07:00:16Z |
| dc.date.available |
2012-02-15T07:00:16Z |
| dc.date.copyright |
2012 |
| dc.date.issued |
2012-02-15 |
| dc.identifier.citation |
Poletkin, K. V., Gurzadyan, G. G., Shang, J., & Kulish, V. (2012). Ultrafast heat transfer on nanoscale in thin gold films. Applied Physics B: Lasers and Optics, 107(1), 137-143. |
| dc.identifier.uri |
http://hdl.handle.net/10220/7525 |
| dc.description.abstract |
Heat transfer processes, induced by ultrashort
laser pulses in thin gold films, were studied with a time
resolution of 50 fs. It is demonstrated that in thin gold
films heat is transmitted by means of electron–phonon and
phonon–phonon interactions, and dissipated on nanoscale
within 800 fs. Measurements show that the electron–phonon
relaxation time varies versus the probe wavelength from 1.6
to 0.8 ps for λ = 560–630 nm. Applied mathematical model
is a result of transforming the two-temperature model to
the hyperbolic heat equation, based on assumptions that the
electron gas is heated up instantaneously and applying Cattaneo’s
law to the phonon subsystem, agrees well with the
experimental results. This model allows us to define time
of electron–phonon scattering as the ratio of the heat penetration
depth to the speed of sound in the bulk material
that, in turn, provides an explanation of experimental results
that show the dependence of the electron–phonon relaxation
time on the wavelength. |
| dc.format.extent |
26 p. |
| dc.language.iso |
en |
| dc.relation.ispartofseries |
Applied physics B: lasers and optics |
| dc.rights |
© 2011 Springer-Verlag. This is the author created version of a work that has been peer reviewed and accepted for publication by Applied Physics B: Lasers and Optics, Springer-Verlag. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1007/s00340-011-4862-z]. |
| dc.subject |
DRNTU::Engineering::Mechanical engineering::Fluid mechanics. |
| dc.title |
Ultrafast heat transfer on nanoscale in thin gold films. |
| dc.type |
Journal Article |
| dc.contributor.school |
School of Mechanical and Aerospace Engineering |
| dc.identifier.doi |
http://dx.doi.org/10.1007/s00340-011-4862-z |
| dc.description.version |
Accepted version |
| dc.contributor.organization |
School of Physical and Mathematical Sciences |
