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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 14 — Jul. 14, 2014
  • pp: 17360–17369

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

Dong-Hyub Lee, Joonhee Choi, Seungchul Kim, In-Yong Park, Seunghwoi Han, Hyunwoong Kim, and Seung-Woo Kim  »View Author Affiliations


Optics Express, Vol. 22, Issue 14, pp. 17360-17369 (2014)
http://dx.doi.org/10.1364/OE.22.017360


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Abstract

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.

© 2014 Optical Society of America

OCIS Codes
(190.4180) Nonlinear optics : Multiphoton processes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.7120) Ultrafast optics : Ultrafast phenomena

ToC Category:
Ultrafast Optics

History
Original Manuscript: May 28, 2014
Revised Manuscript: July 2, 2014
Manuscript Accepted: July 2, 2014
Published: July 9, 2014

Virtual Issues
August 18, 2014 Spotlight on Optics

Citation
Dong-Hyub Lee, Joonhee Choi, Seungchul Kim, In-Yong Park, Seunghwoi Han, Hyunwoong Kim, and Seung-Woo Kim, "Observation of strongly enhanced ultrashort pulses in 3-D metallic funnel-waveguide," Opt. Express 22, 17360-17369 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-14-17360


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