naa a22 4500 510816878 CHVBK 20180411083511.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-013-9521-2 doi (NATIONALLICENCE)springer-10.1007/s11468-013-9521-2 Kumar Ashok Physics Department, AIAS, Amity University, 201303, Noida, UP, India aut Ponderomotive Self-focusing of Surface Plasma Wave [Elektronische Daten] [Ashok Kumar] A large amplitude surface plasma wave (SPW) propagating over a conductor-vaccum interface with Gaussian intensity profile transverse to the direction of propagation ( $$ \widehat{z} $$ ) and surface normal ( $$ \widehat{x} $$ ) is shown to undergo periodic self-focusing due to ponderomotive nonlinearity. The ponderomotive force on electrons arises due to the rapid decline in surface wave amplitude with the depth inside the conductor. In case of plasma, this leads to ambipolar diffusion of plasma, whereas in metals, only electron displacement occurs until the space charge balances the ponderomotive force on electrons. For a surface plasma wave, having Gaussian amplitude profile in y, the maximum electron density depression occurs on the axis (y = 0) and the effect weakens as |y| increases. The axial portion of SPW thus travels with slower phase velocity than the nonaxial portion leading to self-focusing. Springer Science+Business Media New York, 2013 Surface plasma wave nationallicence Focusing nationallicence Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 1135-1139 1557-1955 8:2<1135 2013 8 11468 https://doi.org/10.1007/s11468-013-9521-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-013-9521-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kumar Ashok Physics Department, AIAS, Amity University, 201303, Noida, UP, India aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 1135-1139 1557-1955 8:2<1135 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer