Role of dispersion on zero-average-index bandgaps
We consider periodic multilayers combining ordinary positive index materials and dispersive metamaterials with negative index in some frequency ranges. These structures can exhibit photonic bandgaps which, in contrast with the usual Bragg gaps, are not based on interference mechanisms. Changing the...
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2009
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07403224_v26_n4_p581_Silvestre http://hdl.handle.net/20.500.12110/paper_07403224_v26_n4_p581_Silvestre |
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paper:paper_07403224_v26_n4_p581_Silvestre2023-06-08T15:44:33Z Role of dispersion on zero-average-index bandgaps Dispersion (waves) Metamaterials Refractive index Analytical expressions Constitutive parameters Dispersion models Frequency ranges Interference mechanisms Negative index Periodic multilayers Positive index materials Energy gap We consider periodic multilayers combining ordinary positive index materials and dispersive metamaterials with negative index in some frequency ranges. These structures can exhibit photonic bandgaps which, in contrast with the usual Bragg gaps, are not based on interference mechanisms. Changing the dispersion models for the constituent metamaterial, we investigate its role in the production of zero-average-index bandgaps. In particular, we show the effect of each constitutive parameter on both bandgap edges. Finally, we give some approximated analytical expressions in terms of average parameters for the determination of the upper and lower limits of the zero-average refractive-index bandgap. © 2009 Optical Society of America. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07403224_v26_n4_p581_Silvestre http://hdl.handle.net/20.500.12110/paper_07403224_v26_n4_p581_Silvestre |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Dispersion (waves) Metamaterials Refractive index Analytical expressions Constitutive parameters Dispersion models Frequency ranges Interference mechanisms Negative index Periodic multilayers Positive index materials Energy gap |
spellingShingle |
Dispersion (waves) Metamaterials Refractive index Analytical expressions Constitutive parameters Dispersion models Frequency ranges Interference mechanisms Negative index Periodic multilayers Positive index materials Energy gap Role of dispersion on zero-average-index bandgaps |
topic_facet |
Dispersion (waves) Metamaterials Refractive index Analytical expressions Constitutive parameters Dispersion models Frequency ranges Interference mechanisms Negative index Periodic multilayers Positive index materials Energy gap |
description |
We consider periodic multilayers combining ordinary positive index materials and dispersive metamaterials with negative index in some frequency ranges. These structures can exhibit photonic bandgaps which, in contrast with the usual Bragg gaps, are not based on interference mechanisms. Changing the dispersion models for the constituent metamaterial, we investigate its role in the production of zero-average-index bandgaps. In particular, we show the effect of each constitutive parameter on both bandgap edges. Finally, we give some approximated analytical expressions in terms of average parameters for the determination of the upper and lower limits of the zero-average refractive-index bandgap. © 2009 Optical Society of America. |
title |
Role of dispersion on zero-average-index bandgaps |
title_short |
Role of dispersion on zero-average-index bandgaps |
title_full |
Role of dispersion on zero-average-index bandgaps |
title_fullStr |
Role of dispersion on zero-average-index bandgaps |
title_full_unstemmed |
Role of dispersion on zero-average-index bandgaps |
title_sort |
role of dispersion on zero-average-index bandgaps |
publishDate |
2009 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07403224_v26_n4_p581_Silvestre http://hdl.handle.net/20.500.12110/paper_07403224_v26_n4_p581_Silvestre |
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1768544782348451840 |