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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 7, Iss. 1 — Jan. 1, 2009
  • pp: 74–77

Field enhancement effect of metal probe in evanescent field

Xiaogang Hong, Wendong Xu, Xiaogang Li, Chengqiang Zhao, and Xiaodong Tang  »View Author Affiliations


Chinese Optics Letters, Vol. 7, Issue 1, pp. 74-77 (2009)


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Abstract

Field enhancement effect of metal probe in evanescent field, induced by using a multi-layers structure for exciting surface plasmon resonance (SPR), is analyzed numerically by utilizing two-dimensional (2D) TM-wave finite difference time-domain (FDTD) method. In this letter, we used a fundamental mode Gaussian beam to induce evanescent field, and calculated the electric intensity. The results show that compared with the nonmetal probe, the metal probe has a larger field enhancement effect, and its scattering wave induced by field enhancement has a bigger decay coefficient. The field enhancement effect should conclude that the metal probe has an important application in nanolithography.

© 2009 Chinese Optics Letters

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics

Citation
Xiaogang Hong, Wendong Xu, Xiaogang Li, Chengqiang Zhao, and Xiaodong Tang, "Field enhancement effect of metal probe in evanescent field," Chin. Opt. Lett. 7, 74-77 (2009)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-7-1-74


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