Design of impurity band-based photonic crystal waveguides and delay lines for ultrashort optical pulses

被引:74
作者
Lan, S
Nishikawa, S
Ishikawa, H
Wada, O
机构
[1] FESTA, Tsukuba, Ibaraki 3002635, Japan
[2] Kobe Univ, Dept Elect & Elect Engn, Nada Ku, Kobe, Hyogo 6578501, Japan
关键词
D O I
10.1063/1.1407318
中图分类号
O59 [应用物理学];
学科分类号
摘要
We investigate the transmission of ultrashort pulses through impurity band-based photonic crystal waveguides. It is found that in the general case the transmission behavior depends strongly on the pulse width with respect to the resonance linewidth in impurity bands. By controlling the configuration of the waveguides, quasiflat impurity bands can be obtained in which the dependence of transmission on pulse width is very weak. As long as the pulse width is much narrower than the bandwidth, pulses can transmit through the quasiflat impurity bands with negligible distortion and attenuation. The conditions necessary for achieving quasiflat impurity bands are derived by examining waveguides of different configurations and properties. The mechanism responsible for the formation of quasiflat impurity bands is revealed from the discussion of the symmetry of single defect and their coupling. (C) 2001 American Institute of Physics.
引用
收藏
页码:4321 / 4327
页数:7
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