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Modelling of Plasmonic and Graphene Nanodevices / by Javier Munárriz Arrieta
Resource type: Ressourcentyp: Buch (Online)Buch (Online)Sprache: Englisch Reihen: Springer Theses, Recognizing Outstanding Ph.D. Research | SpringerLink BücherVerlag: Cham ; s.l. : Springer International Publishing, 2014Beschreibung: Online-Ressource (XVII, 121 p. 64 illus., 48 illus. in color, online resource)ISBN:- 9783319070889
- 621.36
- 546.681 23
- QC350-467 TA1501-1820 QC392-449.5 TA1750-1750.22
- QC350-467
- TA1501-1820
- QC392-449.5
- TA1750-1750.22
Inhalte:
Zusammenfassung: The thesis covers a broad range of electronic, optical and opto-electronic devices and various predicted physical effects. In particular, it examines the quantum interference transistor effect in graphene nanorings; tunable spin-filtering and spin-dependent negative differential resistance in composite heterostructures based on graphene and ferromagnetic materials; optical and novel electro-optical bistability and hysteresis in compound systems; and the real-time control of radiation patterns of optical nanoantennas. The direction of the main radiation lobe of a regular plasmonic array can be changed abruptly by small variations in external control parameters. This optical effect, apart from its relevance for applications, is a revealing example of the Umklapp process and, thus, is a visual manifestation of one of the most fundamental laws of solid state physics: the conservation of the quasi-momentum to within a reciprocal lattice vector. The thesis analyzes not only results for particular device designs but also a variety of advanced numerical methods which are extended by the author and described in detail. These methods can be used as a sound starting point for further research.PPN: PPN: 165796311XPackage identifier: Produktsigel: ZDB-2-PHA
Supervisors' Foreword; Contents; Symbols and Abbreviations; Publications Related to this Thesis; 1 Introduction; 1.1 Devices Based on Graphene; 1.2 Plasmonic Nanodevices; 1.3 Objectives and Outline; References; Part IElectronic Nanodevices Basedon Graphene; 2 Tight-Binding Description of Graphene Nanostructures; 2.1 Dispersion Relation of Graphene; 2.1.1 Dirac Points and Dirac Cones; 2.1.2 Opening Gaps in Graphene; 2.2 Electronic Properties of Graphene Nanoribbons; 2.2.1 Relationship Between Dispersions of the 1-D and 2-D Systems; 2.2.2 Dependence of the Dispersion Relation on the Model Used
2.3 Electronic Transport Through Quantum 1-D Systems2.3.1 Spin-Dependent Transport in 1-D Systems; 2.3.2 Current Density of a Mode Within the Tight Binding Model; References; 3 Graphene Nanoring as a Quantum Interference Device; 3.1 Background: Interference Effects in Quantum Rings; 3.2 System and Modelling; 3.3 Results and Discussion; 3.3.1 Resonance Transmission Bands in Armchair-Edged Nanorings; 3.3.2 Interference Transmission Bands in Armchair-Edged Nanorings; 3.3.3 Interference Transmission Bands in Zigzag-Edged Nanorings; 3.3.4 Current--Voltage Characteristics
3.4 Effects of the Edge Disorder3.5 Summary; References; 4 Graphene Nanoring as a Source of Spin-Polarized Electrons; 4.1 System and Modelling; 4.2 Results and Discussion; 4.2.1 Spin-Dependent Transmission Without Side-Gate Voltage; 4.2.2 Control of the Current Polarization via the Side-Gate Voltage; 4.3 Effect of Edge Disorder and Geometric Imperfections; 4.3.1 Edge Disorder; 4.3.2 Geometric Imperfections; 4.3.3 Origin of Fano Resonances in Asymmetric Rings; 4.4 Summary; References; 5 Spin-Dependent Negative Differential Resistance in Graphene Superlattices; 5.1 System and Modelling
5.1.1 Tight-Binding Hamiltonian and the QTBM5.1.2 Dirac Theory for aGNRs; 5.2 Results and Discussion; 5.2.1 Transmission for Zero Bias; 5.2.2 Currents and Spin Polarization for Finite Bias; 5.3 Effect of Geometric Disorder; 5.4 Summary; References; Part IIElectro-Optical Nanodevices; 6 Optical Nanoantennas with Tunable Radiation Patterns; 6.1 Model and Formalism; 6.2 Numerical Results; 6.3 Analytical Results and Discussion; 6.4 Summary; References; 7 Electro-Optical Hysteresis of Nanoscale Hybrid Systems; 7.1 Approximations and Formalism; 7.2 Bistability Due to Self-Interaction
7.3 Electro-Optical Hysteresis7.4 Non-Adiabatic Branch Flips; 7.5 Summary; References; 8 Conclusions and Prospects; 8.1 Conclusions Regarding Electronic Nanodevices Based on Graphene; 8.2 Conclusions Regarding Electro-Optical Nanodevices; 8.3 Prospective Research; References; Appendix ATMM and QTBM Methods; Appendix BGreen's Tensor in a Stratified Media
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