Observation of strongly enhanced ultrashort pulses in 3-D metallic funnel-waveguide

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For strong field enhancement of ultrashort light pulses, a 3-D metallic funnel-waveguide is analyzed using the finite-difference time-domain (FDTD) method. Then the maximum intensity enhancement actually developed by the funnel-waveguide upon the injection of femtosecond laser pulses is observed using two-photon luminescence (TPL) microscopy. In addition, the ultrafast dephasing profile of the localized field at the hot spot of the funnel-waveguide is verified through the interferometric autocorrelation of the TPL signal. Finally it is concluded the funnel-waveguide is an effective 3-D nanostructure that is capable of boosting the peak pulse intensity of stronger than 80 TWcm(-2) by an enhancement factor of 20 dB without significant degradation of the ultrafast spatiotemporal characteristics of the original pulses. (C)2014 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2014-07
Language
English
Article Type
Article
Keywords

FIELD ENHANCEMENT; GENERATION; PLASMONS; DYNAMICS; RADIATION; FUTURE

Citation

OPTICS EXPRESS, v.22, no.14, pp.17360 - 17369

ISSN
1094-4087
DOI
10.1364/OE.22.017360
URI
http://hdl.handle.net/10203/192545
Appears in Collection
ME-Journal Papers(저널논문)
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