Picture of Open Access badges

Discover Open Access research at Strathprints

It's International Open Access Week, 24-30 October 2016. This year's theme is "Open in Action" and is all about taking meaningful steps towards opening up research and scholarship. The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Explore recent world leading Open Access research content by University of Strathclyde researchers and see how Strathclyde researchers are committing to putting "Open in Action".


Image: h_pampel, CC-BY

Radiation pressure and momentum transfer in dielectrics: The photon drag effect

Loudon, R and Barnett, S M and Baxter, C (2005) Radiation pressure and momentum transfer in dielectrics: The photon drag effect. Physical Review A, 71 (6). -. ISSN 1094-1622

Full text not available in this repository. (Request a copy from the Strathclyde author)


The momentum transfer from light to a dielectric material in the photon drag effect is calculated by evaluation of the relevant Lorentz force. In accordance with measurements on Si and Ge, the material is taken as a two-component optical system, with charge carriers described by an extinction coefficient kappa in a host semiconductor described by real refractive indices eta(p) (phase) and eta(g) (group). The calculated momentum transfer to the charge carriers alone has the value eta(p)h omega/c per photon, the so-called Minkowski value, found experimentally. The time-dependent Lorentz force is calculated for light in the form of a narrow-band single-photon pulse. When the pulse is much shorter than the attenuation length, which is much shorter than the sample thickness, there is a clear separation in time between surface and bulk contributions to the forces. The total bulk momentum transfer (charges plus host) in this case is found to be h omega/eta(g)c, the so-called Abraham value.