Negative light pressure force between two metal bodies separated by a subwavelength slit
Physikalisch-Technische Bundesanstalt (PTB) - 100 Bundesallee, 38116 Braunschweig, Germany, EU
2 Institute of Automation and Electrometry, SB RAS - 1 Koptyug ave., 630090 Novosibirsk, Russia
3 Novosibirsk State University - 2 Pirogov str., 630090 Novosibirsk, Russia
Accepted: 29 April 2011
An explicit analytical expression of a light-induced attractive force between two macroscopic metal bodies or films separated by a subwavelength slit has been derived. The analytical expression obtained agrees well with the numerical calculations for the main TM mode. This force, which acts as a force with negative light pressure, arises by the interaction of plasmon-polaritons excited at the surface of metal when light propagates through the subwavelength slit. Estimations of this light-induced attractive force show that the force is sufficient to enable measurements and practical applications.
PACS: 42.50.Wk – Mechanical effects of light on material media, microstructures and particles / 42.25.Bs – Wave propagation, transmission and absorption / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EPLA, 2011