Propagation dynamics of femtosecond pulse through subwavelength metallic hole arrays

Article

关键词: SURFACE-PLASMON-POLARITONS;    EXTRAORDINARY OPTICAL-TRANSMISSION;    LIGHT TRANSMISSION;    NANOSTRUCTURES;    SHIFTS;    FILMS;   

DOI  :  10.1103/PhysRevB.83.245449

来源: SCIE

【 摘 要 】

We have studied the frequency-dependent transmission time delay of femtosecond (fs) laser pulses through subwavelength hole arrays in aluminum films using the up-conversion technique. The pulse delays measured at different wavelengths mainly follow the far-field transmission profile of the surface-plasmon polariton (SPP) resonances. Temporal delays of 60 and 100 fs were found at the major SPP resonance in the single-layer and double-layer samples. A coupled-SPP transmission model is used to explain the temporal dynamics of the transmission process. Our experiment shows that the weak coupling between the SPP waves on different metal-dielectric interfaces leads to the large temporal delay of the transmitted pulses.

【 授权许可】

Free