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Proceedings Paper

Light-induced energy flow at a metal surface
Author(s): Ole Keller; Kjeld Pedersen
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Paper Abstract

The stationary energy current density associated with the transmission of light through a metal-vacuum surface is analysed. Combining the Maxwell equations and Boltzmann's transport equation, a generalized Poynting vector of the coupled system of light and conduction electrons is obtained. Within the framework of nonlocal optics, the structure of the electromagnetic and material parts of the Poynting vector is investigated. Dividing the electric field into divergence-free (T) and rotational-free (L) parts, explicit expressions are derived for the o-ca1led TT and TL-parts of the electromagnetic Poynting vector, and for the TT, TL, and LL-parts of the Poynting vector associated with the kinetic energy flow in the electron system. Analytical expressions are derived for the third rank nonlinear response tensor describing the kinetic energy flow for oblique incident light. Special emphasis is devoted to a study of the contributions to the energy current density from collective plasmon and polariton excitations in the frequency range between the longitudinal and transverse plasma edges. A comparison of the present work with previous ones based on the so-called hydrodynamic description is given.

Paper Details

Date Published: 1 October 1990
PDF: 24 pages
Proc. SPIE 1276, CO2 Lasers and Applications II, (1 October 1990); doi: 10.1117/12.20565
Show Author Affiliations
Ole Keller, Univ. of Aalborg (Denmark)
Kjeld Pedersen, Univ. of Aalborg (Denmark)

Published in SPIE Proceedings Vol. 1276:
CO2 Lasers and Applications II
Hans Opower, Editor(s)

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