In this experiment, unamplified 100-fs CPM laser pulses are employed to couple, optically and resonantly, to the single metal boundary surface-plasmon polaritons (SMSPs) of a 430-Ả thick Ag film. Because the phase velocity of the SMSP is slower than that of a photon of the same energy, direct coupling to a photon field is forbidden. However, using attenuated total internal reflection (ATR) geometry, this momentum matching condition is fulfilled with the aid of a glass prism by adjusting the incident angle of the incoming laser until the photon matches the SMSP dispersion.1 The experiment was performed in a vacuum chamber of 3 × 10-8 Torr with an extraction voltage of 0.5 kV applied to a Cu ring anode.

© 1990 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription