Electroabsorption in Metallic Nanoparticles within Transparent Dielectric Media

Applied Sciences

Mrinal Thakur¹  Justin Van Cleave¹ 

[1] Photonic Materials Research Laboratory, Auburn University, Auburn, AL 36849, USA;

关键词: electroabsorption;    metallic nano- and subnanometer particles;    nonlinear optics;    Kerr coefficient;    nonconjugated conductive polymers;   

DOI  :  10.3390/app10144904

来源: DOAJ

【 摘 要 】

Electroabsorption in metallic nanoparticles within transparent dielectric media has been measured. In particular, gold nanoparticles in glass and subnanometer-size metallic domains in iodine doped nonconjugated conductive polymer have been studied. Measurements have been made for applied ac fields at 4 kHz, at a wavelength close to the onset of the surface plasmon resonance. The measured electroabsorption (imaginary part of χ⁽³⁾ or Kerr coefficient) has a quadratic dependence on electric field. Its magnitudes were compared for different sizes of the metallic nanoparticles down to the subnanometer-size particles in iodine-doped nonconjugated conductive polymer. As in the case of quadratic electro-optic effect reported earlier, electroabsorption has approximately a 1/d³ dependence, d being the diameter of nanoparticle. This is consistent with existing theories on confined metallic systems.

【 授权许可】

Unknown