Defect states and commensurability in dual-period AlxGa1-xAs photonic crystal waveguides -: art. no. 033303

被引：31

作者：

Bristow, AD

Whittaker, DM ^{[1
]}

Astratov, VN

Skolnick, MS

Tahraoui, A

Krauss, TF

Hopkinson, M

Croucher, MP

Gehring, GA

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[2] Univ N Carolina, Dept Phys, Charlotte, NC 28223 USA

[3] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[4] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.68.033303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

AlxGa1-xAs waveguides with one-dimensional dual-period patterning, consisting of a short period lattice of semiconductor stripes with periodically placed defects, are investigated by surface coupling reflectivity. Defect states, characterized by flat dispersions and enhanced optical density in the defect region, are observed within an energy gap arising from the short period modulation of the structure. When the defect width is incommensurate with the short period, strong additional features due to band folding are observed. The experimental spectra and dispersions are found to be in very good agreement with the predictions of scattering-matrix calculations.

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页数：4

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