The scattering of a surface plasmon polariton in a semiconductor slab by rapid plasma creation in the slab is explored. As a result of the scattering, the initial surface wave breaks up into two frequency-upshifted surface waves propagating in opposite directions along the slab and generates a static magnetic field and a dc inside the slab and transient radiation that escapes the slab. A part of the initial energy can also be trapped inside the slab owing to total internal reflection and forms frequency-upshifted guided modes of the slab. The scattering of a surface wave by a rapidly created plasma allows the analysis of basic processes that occur in nonstationary media in the presence of boundaries. The practical applications include the control of propagation of guided radiation in integrated optics devices, coupling the radiation out of waveguides, and ultrafast transient spectroscopy of an electron–hole plasma in semiconductors.
© 1999 Optical Society of America
(230.7400) Optical devices : Waveguides, slab
(240.6680) Optics at surfaces : Surface plasmons
(260.2110) Physical optics : Electromagnetic optics
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(350.5400) Other areas of optics : Plasmas
Michael I. Bakunov, Alexey V. Maslov, and Sergey N. Zhukov, "Scattering of a surface plasmon polariton by rapid plasma creation in a semiconductor slab," J. Opt. Soc. Am. B 16, 1942-1950 (1999)