Abstract

We demonstrate subpicosecond control over the coupling of free-space radiation to surface-plasmon polaritons using 830 and 500nm period gold gratings. Thermal changes to the electron distribution following irradiation by 100fs, 810nm pulses produce a shift of the 570nm plasmon resonance by 0.75nm with reflectivity change up to 6% and decay time of 1ps.

© 2008 Optical Society of America

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