Defect states and commensurability in dual-period AlxGa1-xAs photonic crystal waveguides

A D  Bristow; D M  Whittaker; V N  Astratov; M S  Skolnick; A  Tahraoui; T F  Krauss; M  Hopkinson; M P  Croucher; G A  Gehring

doi:10.1103/PhysRevB.68.033303

Defect states and commensurability in dual-period Al_xGa_1-xAs photonic crystal waveguides

A D Bristow, D M Whittaker, V N Astratov, M S Skolnick, A Tahraoui, T F Krauss, M Hopkinson, M P Croucher, G A Gehring

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	033303
Number of pages	4
Journal	Physical Review. B, Condensed matter and materials physics
Volume	68
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevB.68.033303
Publication status	Published - 15 Jul 2003

Keywords

NEAR-INFRARED WAVELENGTHS
STRONG LOCALIZATION

Access to Document

10.1103/PhysRevB.68.033303

Cite this

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title = "Defect states and commensurability in dual-period AlxGa1-xAs photonic crystal waveguides",

abstract = "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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journal = "Physical Review. B, Condensed matter and materials physics",

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T1 - Defect states and commensurability in dual-period AlxGa1-xAs photonic crystal waveguides

AU - Bristow, A D

AU - Whittaker, D M

AU - Astratov, V N

AU - Skolnick, M S

AU - Tahraoui, A

AU - Krauss, T F

AU - Hopkinson, M

AU - Croucher, M P

AU - Gehring, G A

PY - 2003/7/15

Y1 - 2003/7/15

N2 - 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.

AB - 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.

KW - NEAR-INFRARED WAVELENGTHS

KW - STRONG LOCALIZATION

U2 - 10.1103/PhysRevB.68.033303

DO - 10.1103/PhysRevB.68.033303

M3 - Article

SN - 1098-0121

VL - 68

SP - 033303

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 3