Martin McCall

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Akhlesh Lakhtakia CATMAS Group Dept. Eng. Science
Mechanics. Pennsylvania State Univ.
Martin McCall Photonics Group Department of
Physics Imperial College, UK
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(No Transcript)
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Region III Chiral sculptured thin film
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Scattering at corrugated interface
I
II
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Scattering at corrugated interface
RegionI
RegionII
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Planewave response of chiral STF
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Planewave response of chiral STF
Chiral STF/ dielectric
Dielectric/ chiral STF
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Combining amplitudes
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Compute reflectivities/transmissivities in
circular basis
e.g. Reflected LCP (at order n) for incident RCP
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DATA
Regions I and III
Index match
Regions II and IV
Corrugation
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reflected orders suppressed for
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Rayleigh-Wood anomaly in reflection
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transmitted order suppressed for
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Rayleigh-Wood anomaly in transmission
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Conclusion

• Model combining surface and volume gratings
• Rayleigh-Wood anomalies and circular Bragg
  phenomenon can robustly co-exist
• Incidence from above further case studies in
  Electromagnetics, (2002), Accepted.
• Potential for integrated devices combining both
  grating types with quantifiable cross-talk