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Coherent transmission of terahertz wave through randomly packed subwavelength-sized aluminium particles

Wang Li Chen Hua

Coherent transmission of terahertz wave through randomly packed subwavelength-sized aluminium particles

Wang Li, Chen Hua
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  • Received Date:  26 February 2009
  • Accepted Date:  27 March 2009
  • Published Online:  20 December 2009

Coherent transmission of terahertz wave through randomly packed subwavelength-sized aluminium particles

  • 1. (1)中国科学院物理研究所光物理实验室,北京 100190; (2)中国科学院物理研究所光物理实验室,北京 100190;东南大学物理系,南京 211189

Abstract: We experimentally discovered that the efficient coupling of surface plasmon wave to free-space radiation beyond the interaction zone via random metallic particles. In the experiments of terahertz wave transmission through an ensemble of randomly packed aluminium particles with sub-wavelength sizes, we observed a strong dependence of the transmission on the lateral boundary conditions. Our results showed that the processes of terahertz wave propagating in the disk-shaped samples and reemitting to the free space were resulted from surface modes excitation, which is critically affected by lateral sizes of the particle ensembles.

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