1.
Phys Rev Lett
; 112(1): 017402, 2014 Jan 10.
Artigo
em Inglês
| MEDLINE
| ID: mdl-24483931
RESUMO
We show that scattering from a single gold nanoparticle is saturable for the first time. Wavelength-dependent study reveals that the saturation behavior is governed by depletion of surface plasmon resonance, not the thermal effect. We observed interesting flattening of the point spread function of scattering from a single nanoparticle due to saturation. By extracting the saturated part of scattering via temporal modulation, we achieve λ/8 point spread function in far-field imaging with unambiguous separation of adjacent particles.