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	Optimal design for wide-band single-mode two-dimensional photonic crystal waveguides: role of waveguide width
	Yu-Rong Zhen ; Lie-Ming Li
	2010-10-12 ; 2010-10-12
关键词	Theoretical or Mathematical/ Fourier transform optics optical design techniques optical waveguide theory photonic crystals/ counterpropagating modes finite line-defect two-dimensional photonic crystal waveguides square lattice dielectric cylinders multiple scattering theory counterpropagating guided modes Fourier transform wave vectors energy-confining mechanism transversal modes single-mode transmission/ A4280L Optical waveguides and couplers A4215E Optical system design A4270Q Photonic bandgap materials B4130 Optical waveguides B5240D Waveguide and cavity theory
中文摘要	The propagation of counterpropagating modes in finite line-defect two-dimensional photonic crystal waveguides consisting of square lattice dielectric cylinders has been investigated by a numerical study based on multiple scattering theory. In the presence of forward propagating external light at one given frequency, two counterpropagating guided modes with the same spatial frequency can be simultaneously excited. Determined by the Fourier transform of field distribution inside waveguides, the wave vectors and lateral profiles of modes are demonstrated to coincide with theoretical results from a simple model, which only has the advantage of an energy-confining mechanism in waveguides. In addition, the spectral amplitude ratio of the backward mode to the forward mode is found to decay with a larger waveguide width and higher frequency. With an appropriate choice of waveguide width, both backward mode and higher transversal modes can be inhibited effectively, giving rise to highly efficient single-mode transmission in a wide and flat spectrum.
语种	英语
出版者	IOP Publishing Ltd. ; UK
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/81569]
专题	清华大学
推荐引用方式 GB/T 7714	Yu-Rong Zhen,Lie-Ming Li. Optimal design for wide-band single-mode two-dimensional photonic crystal waveguides: role of waveguide width[J],2010, 2010.
APA	Yu-Rong Zhen,&Lie-Ming Li.(2010).Optimal design for wide-band single-mode two-dimensional photonic crystal waveguides: role of waveguide width..
MLA	Yu-Rong Zhen,et al."Optimal design for wide-band single-mode two-dimensional photonic crystal waveguides: role of waveguide width".(2010).

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