RT journal article
T1 Active, reactive and instantaneous optical forces on small particles in the time domain: ultrafast attosecond subcycle pulses
A1 Xu, Xiaohao
A1 Valdivia Valero, Francisco Javier
A1 Nieto Vesperinas, M.
A2 Física Aplicada
K1 optical forces
K1 time-dependent electrodynamical forces
K1 evanescent waves
K1 lateral forces
K1 pulling forces
K1 ultrafast optics
K1 subcycle pulses
AB Recently discovered reactive optical forces have a null time-average of their instantaneous values on monochromatic illumination, so that their detection suggests the use of ultrafast optics, especially in the femto- and attosecond domains. Using illumination with subcycle attosecond evanescent pulses, we report a theoretical study of the time variations of instantaneous forces and the behaviour of reactive forces versus those active on small resonant particles that we consider dipolar. We demonstrate how the structure of these pulses permits us to obtain three remarkable novel effects on electric dipoles, namely a lateral force, a pulling force against the canonical and Poynting momenta of the wavefield and a levitating effect on the particle under repetition of the pulse. We hope that this study will inaugurate novel research in the area of optical manipulation. Future developments and experiments based on this theory should increase insight into and operation of the ultrafast dynamics of nanostructures.
PB IOP Publishing Ltd
SN 2040-8986
YR 2025
FD 2025
LK http://hdl.handle.net/10498/39376
UL http://hdl.handle.net/10498/39376
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026