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Proceedings Paper

Aperture design and analysis of nano-aperture laser
Author(s): Tiejun Xu; Jiying Xu; Jia Wang; Liqun Sun; Qian Tian
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Paper Abstract

Nanometric light source is one ofthe most important elements in near-field optical system. In this paper the nearfield distribution of nano-aperture lasers (NAL) with square and asymmetrical C aperture are characterized by the method of 3D finite-difference time-domain (FDTD). The simulation results theoretically reveal that the output power peak from the asymmetrical NAL is three or four orders of magnitude higher than that from the normal square or round aperture with the comparable light spot size in the near-field region and power throughput is more than unity. The maximum ofthe field enhancement occurs at the C aperture size corresponding to one third ofwavelength. The effects of configuration, aperture dimension, electric field component, polarization and separation in local near field close to the aperture have been investigated theoretically and numerically. The mechanism of electromagnetic field enhancement is also discussed. The asymmetrical NAL with higher throughput may expand the range of applications possible in near-field optics.

Paper Details

Date Published: 5 September 2002
PDF: 6 pages
Proc. SPIE 4923, Nano-Optics and Nano-Structures, (5 September 2002); doi: 10.1117/12.481709
Show Author Affiliations
Tiejun Xu, Tsinghua Univ. (China)
Jiying Xu, Tsinghua Univ. (China)
Jia Wang, Tsinghua Univ. (China)
Liqun Sun, Tsinghua Univ. (China)
Qian Tian, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 4923:
Nano-Optics and Nano-Structures
Xing Zhu; Stephen Y. Chou; Yasuhiko Arakawa, Editor(s)

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