We propose an effective medium approach to tune and control surface phonon polariton dispersion relations along the three main crystallographic directions of α-phase molybdenum trioxide. We show that a metamaterial consisting of subwavelength air inclusions into the α-MoO3 matrix displays new absorption modes producing a split of the Reststrahlen bands of the crystal and creating new branches of phonon polaritons. In particular, we report hybridization of bulk and surface polariton modes by tailoring metamaterials' structural parameters. Theoretical predictions obtained with the effective medium approach are validated by full-field electromagnetic simulations using finite difference time domain method. Our study sheds light on the use of effective medium theory for modeling and predicting wavefront polaritons. Our simple yet effective approach could potentially enable different functionalities for hyperbolic infrared metasurface devices and circuits on a single compact platform for on-chip infrared photonics.

Tuning and hybridization of surface phonon polaritons in α-MoO3 based metamaterials / Larciprete, M. C.; Dereshgi, S. A.; Centini, M.; Aydin, K.. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 30:8(2022), pp. 12788-12796. [10.1364/OE.453726]

Tuning and hybridization of surface phonon polaritons in α-MoO3 based metamaterials.

Larciprete M. C.
;
Centini M.;
2022

Abstract

We propose an effective medium approach to tune and control surface phonon polariton dispersion relations along the three main crystallographic directions of α-phase molybdenum trioxide. We show that a metamaterial consisting of subwavelength air inclusions into the α-MoO3 matrix displays new absorption modes producing a split of the Reststrahlen bands of the crystal and creating new branches of phonon polaritons. In particular, we report hybridization of bulk and surface polariton modes by tailoring metamaterials' structural parameters. Theoretical predictions obtained with the effective medium approach are validated by full-field electromagnetic simulations using finite difference time domain method. Our study sheds light on the use of effective medium theory for modeling and predicting wavefront polaritons. Our simple yet effective approach could potentially enable different functionalities for hyperbolic infrared metasurface devices and circuits on a single compact platform for on-chip infrared photonics.
2022
Metamaterial, molibdenum oxide, phonon polaritons.
01 Pubblicazione su rivista::01a Articolo in rivista
Tuning and hybridization of surface phonon polaritons in α-MoO3 based metamaterials / Larciprete, M. C.; Dereshgi, S. A.; Centini, M.; Aydin, K.. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 30:8(2022), pp. 12788-12796. [10.1364/OE.453726]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1630902
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