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42 results on '"Dossou, K."'

2. Exact modelling of generalised defect modes in photonic crystal structures

Author

Dossou, K, Botten, L, Wilcox, S, McPhedran, R, De Sterke, C, Nicorovici, N, and Asatryan, A

Subjects
General Physics
Abstract

An exact theory for modelling modes of generalised defects in 2D photonic crystals (PCs) with a genuinely infinite cladding is presented. The approach builds on our fictitious source superposition method for simple defects and permits an elegant extension allowing the modelling of arbitrary defects. Numerical results that demonstrate the accuracy and efficiency of the extended method are presented. We also use the method to study the evolution of the mode generated by varying the refractive index of a single defect cylinder and find significant differences between the behaviour of defects in rod-type and hole-type PCs. © 2007 Elsevier B.V. All rights reserved.

Published
2007

6. Modeling Light Propagation In Photonic Crystal Devices: Simplification Of The Bloch Mode Scattering Matrix Method

Author

Vahn, G, White, T, Steel, M, De Sterke, C, Dossou, K, and Botten, L

Subjects
light propagation, optical bistability, optical resonators, photonic crystals, Statistical Mechanics, Physical Combinatorics and Mathematical Aspects of Condensed Matter
Abstract

We derive semianalytic models of two types of photonic crystal resonators by simplifying the Bloch mode scattering matrix method. Essential to the models are two parameters, which are interpreted to be the phase change upon reflection and the measure of

Published
2007

8. The SPICES Training Method

Author

Klein, Gabriella Brigitte, Caruana, S., Dossou, K. M., Lasagabaster, D., Mateva, G., Pirih Svetina, N., and Schwitalla, J.

Subjects
intercultural communication in institutions, l2 education, conversation analysis, text analysis, migrants
Published
2007

9. Gap-edge asymptotics of defect modes in twodimensional photonic crystals

Author

Dossou, K, McPhedran, R, Botten, L, Asatryan, A, and De Sterke, C

Abstract

We consider defect modes created in complete gaps of 2D photonic crystals by perturbing the dielectric constant in some region. We study their evolution from a band edge with increasing perturbation using an asymptotic method that approximates the Green function by its dominant component which is associated with the bulk mode at the band edge. From this, we derive a simple exponential law which links the frequency difference between the defect mode and the band edge to the relative change in the electric energy. We present numerical results which demonstrate the accuracy of the exponential law, for TE and TM polarizations, hexagonal and square arrays, and in each of the first and second band gaps.

Published
2007

10. Tools for Trainers and Facilitators

Author

Klein, Gabriella Brigitte, Blanco, B., Calleja, C., Caruana, S., Djakova, I., Dossou, K. M., Ferbežar, I., Lasagabaster, D., Mateva, G., Pirih Svetina, N., Schwitalla, J., Siliotti, E., and Wiederin, V.

Subjects
institutional communication, service interaction, adult training method, intercultural communication, intercultural communication training
Published
2007

11. Presentation of the Spices Guidelines

Author

Klein, Gabriella Brigitte, Caruana, S., Dossou, K. M., Lasagabaster, D., Mateva, G., Pirih Svetina, N., and Schwitalla, J.

Subjects
European project Grundtvig, intercultural communication, adult education
Published
2007

15. Gestione dell'accoglienza e dei colloqui telefonici

Author

Biasi, M., Dossou, K. M., and Klein, Gabriella Brigitte

Subjects
comunicazione interpersonale, comunicazione verbale, comunicazione visiva, comunicazione paraverbale, comunicazione non-verbale, stili di comunicazione
Published
2006

18. Per un'efficace comunicazione d'aula (elementi minimi)

Author

Dossou, K. M. and Klein, Gabriella Brigitte

Subjects
comunicazione verbale, comunicazione interpersonale, comunicazione visiva, sociolinguistica, comunicazione di gruppo, visualizzazione di contenuti
Published
2002

19. La riunione: strumento e strategia di comunicazione

Author

Biasi, M., Dossou, K. M., and Klein, Gabriella Brigitte

Subjects
comunicazione verbale, comunicazione visiva, communicazione interpersonale, comunicazione di gruppo, stili di comunucazione
Published
2001

22. La comunicazione nel rapporto interpersonale e nel lavoro

Author

Biasi, M., Dossou, K. M., and Klein, Gabriella Brigitte

Subjects
comunicazione verbale, comunicazione interpersonale, comunicazione al lavoro, comunicazione paraverbale, comunicazione non-verbale, comunicazione visiva, stili di comunicazione, sociolinguistica, comunicazione di gruppo, visualizzazione di contenuti
Published
2000

28. Perfect absorption in ultra-thin uniform and nanostructured media

Author

Sterke, C. M., Sturmberg, B. C. P., Lindsay Botten, Poulton, C. G., Dossou, K. B., and Mcphedran, R. C.

Abstract

© OSA 2015. We show that perfect absorption can be achieved in ultra-thin gratings composed of weakly absorbing dielectric materials combined with a mirror. The structures can be fabricated using standard processing techniques.

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