A Novel Generalized Scattering Through Heterostructure With A Time-Periodic Potential

Interaction with external time-dependent fields in low-dimensional systems leads in many cases to completely new phenomena of electronic transport. Dealing with a driven system, its quantum dynamics is adequately analyzed in terms of the Floquet or quasienergy spectrum. In this paper, we extend the effective mass model to the case of different effective masses for different materials in a heterostructure. For this case we present a general method which allows us to treat a time modulated potential acting upon a quantum well structure. We extend the work of Wenjun Li and LE Reichl,[1], and consider the case of a multilayer composed of different materials, assuming th

Magnetostatic surface waves propagation at the interface between ferrite and MTMs parallel plate waveguide structure

Accepted 10/6/2013 Abstract: This work considers magnetostatic surface waves propagation in parallel structure composed of ferrite film bounded from below by metamaterial (MTM) placed on metal substrate and from top by air. The Maxwell equations are used to analyse propagation of slow (magnetostatic) surface electromagnetic wave in this structure. Results show that magnetostatic surface wave (MSSW) propagates at certain range of frequencies and varies as both MTM layer and ferrite layer thicknesses change. The new behaviour of the proposed waveguide in the presence of MTM in particular the appearance of the unidirectional MSSW is promising for practical applications such as isolators

The Sensitivity of TE Filed Propagating in LHM-Antiferromagnetic Sensor

A three-layer waveguide structure sensor consists of LHMs (left-handed materials) film surrounded by dielectric cladding and antiferromagnetic substrate is proposed. LHMs known as MTMs (metamaterials) have simultaneous negative permeability and permittivity. The dispersion relation for the structure is derived for TE guided modes. Two ranges of frequencies are chosen such that Voigt permeability, μv, either negative or positive. The sensitivity is proven to be affected by different parameters including the film thickness, LHM parameters, and Voigt frequency

Propagation of Electromagnetic Surface Waves through a Ferrite Slab Bounded by Metamaterials

Recently there has been growing interest in a new type of electromagnetic materials called lefthanded materials (LHMs), or metamaterials. Over thirty years ago Veselago [1] predicted that electromagnetic wave propagation in a medium having simultaneously negative permittivity ε and permeability μ should give rise to several peculiar characteristics. Veselago predicted that in LHM the energy flow (Pointing vector) is anti-parallel to the phase velocity (or wave vector) while in regular materials termed right-handed materials (RHMs), having simultaneously positive ε and μ the Pointing vector (energy flow) gives the direction of the phase velocity. In this communication, the dispersion relationship describing the propagation of electromagnetic surface modes supported by a finite thickness ferrite slab bounded by LHMs media is investigated and discussed

Nonlinear magnetostatic surface waves guided by a single ferroelectric interface

In this communication, an exact analytical solution of magnetostatic surface waves propagating along the boundary of a single interface of nonlinear ferroelectric cover and a linear frequency dependent ferrite is derived for the first time. Propagation characteristics are simulated by a software program and some numerical results are illustrated

Bound States Revealed in a Heterostructure with Time-Periodic Potential

In the present work we study the resonances of a one-dimensional potential barrier driven by an external periodic force considering the position-dependent-effective-mass PDEM formalism. We used the Floquet scattering matrix (S-matrix), to find the quasibound states of the heterostructure system. The resonance states of a periodically driven potential barrier are investigated to calculate the bound state energy of quantum barrie

Floquet Scattering Through a Heterostructure in a Time-Periodic Potential

We studied the resonances of a one-dimensional potential barrier driven by an external periodic force considering the Position Dependent Effective Mass (PDEM) formalism. The Floquet S matrix will be constructed then the transmission probabilities of our system are calculated. We found that the change in the effective mass of the square well does not vary the energy level where resonance occurs

Sensitivity Evaluation of Graphene-Left Handed Waveguide Sensors

In this paper, we present a theoretical investigation of a proposed waveguide sensors containing artificial graphene-left hand materials. The graphene is represented by an infinitesimally thin local and isotropic two-sided conductivity surface. The effects of the left-handed materials through their permittivity and permeability and the thickness of the left-handed film in the proposed waveguide structure sensor are investigated, studied and analyzed. We verify that the proposed sensor can dramatically enhance the sensitivity compared with the conventional parallel-plate layers with graphene and without left-handed materials

Propagation of Polaritons in GaAs/AlgaAs Heterojunction with Left Handed Materials Waveguide Structure in Quantizing Magnetic Field= انتشار البولاريتونات في GaAs/AlxGa1-X كسطح …

يتم تقديم التحقيق النظري لسطح البولاريتونات غير المشعة في المواد الفوقية GaAs/AlxGa1-x (أيسر المواد LHM) كدليل موجي. نقطة الاتصال المختلفة الحقيقية مع LHM في ظل الظروف وتفضيل العدد الصحيح الكمي لتأثير هول (IQHE) ووجود تبديد في طبقة الإلكترون ثنائية الأبعاد. انه وجد أنه في ظل ظروفIQHE، فجميع جوانب سطح البولاريتونات هي كمية. وقد أظهرت أيضا أن منحنيات التبديد هي مقلوبة من قبلLHM الاصطناعي حديثا

انتشار البولاريتونات في GaAs/AlxGa كسطح فاصل بين شبه موصل و مواد أيسرية كتركيب الدليل الموجي في مجال مغناطيسي كمي.

A theoretical investigation of nonradioactive surface polaritons in GaAs/Al x Ga 1-x metamaterials (left-handed material-LHM) waveguide is presented. The real heterojunction with LHM under both conditions is favoring integer-quantum Hall effect (IQHE) and a presence of dissipation in a two-dimensional electron layer. It is found that under IQHE conditions all aspects of surface polaritons are quantized. It has also shown that the dissipation curves have been inverted by the newly artificial LHM