Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab Waveguides
We have theoretically investigated metal-cladded waveguides of tunable hyperbolic metamaterial (THMM) cores, employing graphene sheets as a tunable layer, in terms of guided waves propagation over near- to mid-infrared range, following the effective medium approximation. We have proven that these su...
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MDPI AG
2020-03-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/3/176 |
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| author | Marcin Kieliszczyk Bartosz Janaszek Anna Tyszka-Zawadzka Paweł Szczepański |
| author_facet | Marcin Kieliszczyk Bartosz Janaszek Anna Tyszka-Zawadzka Paweł Szczepański |
| author_sort | Marcin Kieliszczyk |
| collection | DOAJ |
| description | We have theoretically investigated metal-cladded waveguides of tunable hyperbolic metamaterial (THMM) cores, employing graphene sheets as a tunable layer, in terms of guided waves propagation over near- to mid-infrared range, following the effective medium approximation. We have proven that these subwavelength guiding structures offer a number of effects usually not found in other types of waveguides, including controllable propagation gap and number of modes, inversion of power flow direction with respect to phase velocity, TM mode propagation, and absence of the fundamental mode, which occur as a result of controlled change of the guiding layer dispersion regime. This is the first time that the above-mentioned effects are obtained with a single, voltage-controlled waveguiding structure comprising graphene sheets and a dielectric, although the presented methodology allows us to incorporate other tunable materials beyond graphene equally well. We believe that such or similar structures, feasible by means of current planar deposition techniques, will ultimately find their practical applications in optical signal processing, controlled phase matching, controlled coupling, signal modulation, or the enhancement of nonlinear effects. |
| first_indexed | 2024-04-11T11:03:36Z |
| format | Article |
| id | doaj.art-f3737d29e07d4a90a70e8a4ccdfa00e5 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-11T11:03:36Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-f3737d29e07d4a90a70e8a4ccdfa00e52022-12-22T04:28:29ZengMDPI AGCrystals2073-43522020-03-0110317610.3390/cryst10030176cryst10030176Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab WaveguidesMarcin Kieliszczyk0Bartosz Janaszek1Anna Tyszka-Zawadzka2Paweł Szczepański3Warsaw University of Technology, Institute of Microelectronics and Optoelectronics, 75 Koszykowa Street, 00-662 Warsaw, PolandWarsaw University of Technology, Institute of Microelectronics and Optoelectronics, 75 Koszykowa Street, 00-662 Warsaw, PolandWarsaw University of Technology, Institute of Microelectronics and Optoelectronics, 75 Koszykowa Street, 00-662 Warsaw, PolandWarsaw University of Technology, Institute of Microelectronics and Optoelectronics, 75 Koszykowa Street, 00-662 Warsaw, PolandWe have theoretically investigated metal-cladded waveguides of tunable hyperbolic metamaterial (THMM) cores, employing graphene sheets as a tunable layer, in terms of guided waves propagation over near- to mid-infrared range, following the effective medium approximation. We have proven that these subwavelength guiding structures offer a number of effects usually not found in other types of waveguides, including controllable propagation gap and number of modes, inversion of power flow direction with respect to phase velocity, TM mode propagation, and absence of the fundamental mode, which occur as a result of controlled change of the guiding layer dispersion regime. This is the first time that the above-mentioned effects are obtained with a single, voltage-controlled waveguiding structure comprising graphene sheets and a dielectric, although the presented methodology allows us to incorporate other tunable materials beyond graphene equally well. We believe that such or similar structures, feasible by means of current planar deposition techniques, will ultimately find their practical applications in optical signal processing, controlled phase matching, controlled coupling, signal modulation, or the enhancement of nonlinear effects.https://www.mdpi.com/2073-4352/10/3/176hyperbolic metamaterialsslab waveguidesguided wavesoptical waves |
| spellingShingle | Marcin Kieliszczyk Bartosz Janaszek Anna Tyszka-Zawadzka Paweł Szczepański Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab Waveguides Crystals hyperbolic metamaterials slab waveguides guided waves optical waves |
| title | Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab Waveguides |
| title_full | Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab Waveguides |
| title_fullStr | Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab Waveguides |
| title_full_unstemmed | Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab Waveguides |
| title_short | Guided Optical Modes in Metal-Cladded Tunable Hyperbolic Metamaterial Slab Waveguides |
| title_sort | guided optical modes in metal cladded tunable hyperbolic metamaterial slab waveguides |
| topic | hyperbolic metamaterials slab waveguides guided waves optical waves |
| url | https://www.mdpi.com/2073-4352/10/3/176 |
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