Direct subwavelength imaging and control of near-field localization in individual silver nanocubes

作者：Marsell, Erik; Svard, Robin; Miranda, Miguel; Guo, Chen; Harth, Anne; Lorek, Eleonora; Mauritsson, Johan; Arnold, Cord L.; Xu, Hongxing; L'Huillier, Anne; Mikkelsen, Anders; Losquin, Arthur^*

来源：Applied Physics Letters, 2015, 107(20): 201111.

DOI：10.1063/1.4935831

• SURFACE-PLASMON RESONANCE
• SHAPE-CONTROLLED SYNTHESIS
• METAL NANOPARTICLES
• LASER POLARIZATION
• GOLD NANOCUBES
• MICROSCOPY
• NANOSTRUCTURES
• SPECTROSCOPY
• SUBSTRATE
• DYNAMICS

We demonstrate the control of near-field localization within individual silver nanocubes through photoemission electron microscopy combined with broadband, few-cycle laser pulses. We find that the near-field is concentrated at the corners of the cubes, and that it can be efficiently localized to different individual corners depending on the polarization of the incoming light. The experimental results are confirmed by finite-difference time-domain simulations, which also provide an intuitive picture of polarization dependent near-field localization in nanocubes.

• 出版日期2015-11-16
• 单位武汉大学