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	Non-planar 3D nano-aperture design with strong near-field enhancement
	Xu, JY ; Wang, J ; Tian, A
	2010-05-10 ; 2010-05-10
会议名称	JOURNAL OF THE KOREAN PHYSICAL SOCIETY ; 8th International Conference on Near-Field Nano Optic and Related Techniques ; Seoul, SOUTH KOREA ; Web of Science
关键词	near-field optics nano-aperture field enhancement finite-difference time-domain method(FDTD) OPTICAL-DATA STORAGE SURFACE-EMITTING LASER SUBWAVELENGTH APERTURE LIGHT TRANSMISSION SIMULATION HOLES Physics, Multidisciplinary
中文摘要	In this paper a non-planar 3D nano-aperture structure, a two-step-shaped aperture with a combination of a rectangular aperture and a triangular aperture in each step, is proposed. By a 3D finite-difference time-domain (FDTD) method, numerical simulations with a recording medium absent and present have been carried out with plane wave and Gaussian wave. The calculation results reveal that no matter what wave is incident, the novel aperture shows strong near-field enhancement. The peak intensity is enhanced at least 280 times and the power throughput is 1.8994 with plane wave and even approaches 3 with Gaussian wave. With a, recording medium, when the full width at half maximum (FWHM) of the light spot is 1.35 nm x 115 nm, the power delivered to the medium reaches 12.39 % of the incident power. This kind of non-planar 3D nano-aperture can be directly used as an exit aperture of a very-small-aperture laser or as an unattached shield, to produce a sub-wavelength light source with high transmission.
会议录出版者	KOREAN PHYSICAL SOC ; SEOUL ; 635-4, YUKSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19513]
专题	清华大学
推荐引用方式 GB/T 7714	Xu, JY,Wang, J,Tian, A. Non-planar 3D nano-aperture design with strong near-field enhancement[C]. 见:JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 8th International Conference on Near-Field Nano Optic and Related Techniques, Seoul, SOUTH KOREA, Web of Science.

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