FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2956026802> ?p ?o ?g. }

• W2956026802 abstract "Recent years have witnessed remarkable progress in nanoscience and nonlinear optics research, paving entry of 2D materials such as graphene, phosphorene, silicene, and so on. Graphene has extraordinary optical, electrical, mechanical and thermal properties. The uniqueness of graphene lies in its modulation depth (> 90%) and signal attenuation (< 5%), achieved by controlling its Fermi level through gate voltage. It is envisioned that graphene-based modulators would be the ultimate high-speed modulator of the future, performing at speeds up to 10 times faster than existing ones. The accuracy of such solutions lies in determining the permittivity (er) of materials used. Graphene possesses complex conductivity (Ϭ(ω) = Ϭ1 + jϬ2) and permittivity (e(ω) = e1 + je2). Using Kubo formalism, we derived an analytical method for finding the conductivity of graphene (Ϭg,interband +Ϭg,intraband) and then the complex permittivity (eg). The values of e(ω) are plotted as a function of chemical potential (μ, eV), wavelength (λ, nm) and thickness of graphene layers (t(g)). Benchmarking was carried out using two solvers viz., complex and perturbation to ascertain the suitability of the method. Effective mode index (n(eff)) and absorption (α) are calculated for quasi-TE and quasi-TM guided modes of the waveguide. We found that the waveguide performance parameters are highly influenced by the position of graphene layers in the waveguide and the thickness and type of dielectric material that encapsulate the graphene layers. Two positions viz., graphene-as-top layer and graphene-as-slot layer were analysed. Three dielectric materials, hBN, Al2O3 and HfO2, classified as low-, high-and very-high index, respectively, are chosen. For operation wavelength range (1.3{1.7μm) and for varying dielectric layer thickness from 5 to 70 nm, the plots for neff and α (dB/μm) are obtained. Performance parameters such as extinction ratio (ER) and insertion loss (IL) were calculated for varying dielectric thickness (5-70 nm). ER and IL are achieved within the ranges 20-70 and 3-4 dB/μm, respectively. We inferred that to enhance the modal properties (n(eff) and α), graphene-as top layer waveguide can have a combination of very high-index (er = 25) dielectric material (thickness > 15 - 20 nm) encapsulating graphene whereas a very high-index dielectric with reduced thickness (< 5 - 10 nm) encapsulating graphene is suitable for graphene-as-slot layer waveguide." @default.
• W2956026802 created "2019-07-12" @default.
• W2956026802 creator A5016370582 @default.
• W2956026802 date "2019-01-01" @default.
• W2956026802 modified "2023-09-27" @default.
• W2956026802 title "Finite element characterisation of graphene-silicon hybrid waveguides" @default.
• W2956026802 hasPublicationYear "2019" @default.
• W2956026802 type Work @default.
• W2956026802 sameAs 2956026802 @default.
• W2956026802 citedByCount "0" @default.
• W2956026802 crossrefType "dissertation" @default.
• W2956026802 hasAuthorship W2956026802A5016370582 @default.
• W2956026802 hasConcept C133386390 @default.
• W2956026802 hasConcept C168651791 @default.
• W2956026802 hasConcept C171250308 @default.
• W2956026802 hasConcept C192562407 @default.
• W2956026802 hasConcept C200687136 @default.
• W2956026802 hasConcept C2777208637 @default.
• W2956026802 hasConcept C2778602974 @default.
• W2956026802 hasConcept C30080830 @default.
• W2956026802 hasConcept C42067758 @default.
• W2956026802 hasConcept C49040817 @default.
• W2956026802 hasConceptScore W2956026802C133386390 @default.
• W2956026802 hasConceptScore W2956026802C168651791 @default.
• W2956026802 hasConceptScore W2956026802C171250308 @default.
• W2956026802 hasConceptScore W2956026802C192562407 @default.
• W2956026802 hasConceptScore W2956026802C200687136 @default.
• W2956026802 hasConceptScore W2956026802C2777208637 @default.
• W2956026802 hasConceptScore W2956026802C2778602974 @default.
• W2956026802 hasConceptScore W2956026802C30080830 @default.
• W2956026802 hasConceptScore W2956026802C42067758 @default.
• W2956026802 hasConceptScore W2956026802C49040817 @default.
• W2956026802 hasLocation W29560268021 @default.
• W2956026802 hasOpenAccess W2956026802 @default.
• W2956026802 hasPrimaryLocation W29560268021 @default.
• W2956026802 hasRelatedWork W1585814909 @default.
• W2956026802 hasRelatedWork W1986149807 @default.
• W2956026802 hasRelatedWork W1995017613 @default.
• W2956026802 hasRelatedWork W2040922116 @default.
• W2956026802 hasRelatedWork W2078875598 @default.
• W2956026802 hasRelatedWork W2157687671 @default.
• W2956026802 hasRelatedWork W2477564341 @default.
• W2956026802 hasRelatedWork W2520811859 @default.
• W2956026802 hasRelatedWork W2531339604 @default.
• W2956026802 hasRelatedWork W2616826506 @default.
• W2956026802 hasRelatedWork W2770690795 @default.
• W2956026802 hasRelatedWork W2770756381 @default.
• W2956026802 hasRelatedWork W2808446658 @default.
• W2956026802 hasRelatedWork W2839438169 @default.
• W2956026802 hasRelatedWork W3046977700 @default.
• W2956026802 hasRelatedWork W3080445286 @default.
• W2956026802 hasRelatedWork W3083919149 @default.
• W2956026802 hasRelatedWork W3116632435 @default.
• W2956026802 hasRelatedWork W3145665854 @default.
• W2956026802 hasRelatedWork W3157964810 @default.
• W2956026802 isParatext "false" @default.
• W2956026802 isRetracted "false" @default.
• W2956026802 magId "2956026802" @default.
• W2956026802 workType "dissertation" @default.