Abstract
New method of experimental determination of local field enhancement at metal nanoparticles is suggested. It uses surface plasmon as a probe. Alternating-sign shift of surface plasmon resonance in copper nanoparticles incorporated in silica matrix has been observed under irradiation by intense femtosecond laser pulse. The red shift of plasmon observed during the action of pump pulse is interpreted as a result of change of dielectric constant of silica matrix due to optical Kerr effect in electric field of pump pulse enhanced in a vicinity of metal nanoparticles. The field enhancement factor is estimated from the value of the observed red shift of plasmon resonance.
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Dmitruk, I., Blonskiy, I., Pavlov, I. et al. Surface Plasmon as a Probe of Local Field Enhancement. Plasmonics 4, 115–119 (2009). https://doi.org/10.1007/s11468-009-9081-7
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DOI: https://doi.org/10.1007/s11468-009-9081-7