Dispersion Relation of Defect Structure Containing Negative Index
... Photonic crystals are the artificial periodic composite materials which exhibit electromagnetic band gaps [1] In 1968, Veselago [2] was the first time who proposed a peculiar medium possesses a negative index (NIM) which contain negative of permittivity (ε) and permeability (µ) at certain frequency ...
... Photonic crystals are the artificial periodic composite materials which exhibit electromagnetic band gaps [1] In 1968, Veselago [2] was the first time who proposed a peculiar medium possesses a negative index (NIM) which contain negative of permittivity (ε) and permeability (µ) at certain frequency ...
Properties of magnetic materials
... that they cancel each other. The Fe(II) ions all have their magnetic moment in the same direction within a domain and give rise to a fairly strong magnetism. The strength of the magnet can now be fine-tuned by substituting the Fe2+ (4 BM), with other divalent ions of similar size, but different magn ...
... that they cancel each other. The Fe(II) ions all have their magnetic moment in the same direction within a domain and give rise to a fairly strong magnetism. The strength of the magnet can now be fine-tuned by substituting the Fe2+ (4 BM), with other divalent ions of similar size, but different magn ...
SURFACE ELECTROMAGNETIC WAVES IN FINITE
... and x-ray frequencies, basic research, new initiatives and advanced technology developments in the THz band are very limited and remain relatively unexplored [7]. At the same time, we believe that many technical problems can be solved through the use of periodic structures and metamaterials [8–10]. ...
... and x-ray frequencies, basic research, new initiatives and advanced technology developments in the THz band are very limited and remain relatively unexplored [7]. At the same time, we believe that many technical problems can be solved through the use of periodic structures and metamaterials [8–10]. ...
Electromagnetic radiation
... with transfer of energy from the emitter to the radiation field. If no radiation is emitted, the transition from higher to lower energy levels is called nonradiative decay. Scattering: Redirection of light due to its interaction with matter. Scattering might or might not occur with a transfer of ene ...
... with transfer of energy from the emitter to the radiation field. If no radiation is emitted, the transition from higher to lower energy levels is called nonradiative decay. Scattering: Redirection of light due to its interaction with matter. Scattering might or might not occur with a transfer of ene ...
Switching between positive and negative
... media (DNM), left-handed media (LHM), backward wave media (BWM), and negative refractive index media (NRI). These metamaterials are a new class of materials that exhibit unique properties that are consistent with simultaneous negative permittivity (ε < 0) and negative permeability (µ < 0) as postula ...
... media (DNM), left-handed media (LHM), backward wave media (BWM), and negative refractive index media (NRI). These metamaterials are a new class of materials that exhibit unique properties that are consistent with simultaneous negative permittivity (ε < 0) and negative permeability (µ < 0) as postula ...
FREQUENCY RESPONSE OF SPLIT
... method is free from restrictions of the equivalentcircuit model, because it uses a fundamental equations. However, the simulation time increases exponentially with the complexity of a structure. Therefore, it is important to minimize the complexity of the structure without loss of accuracy at the ac ...
... method is free from restrictions of the equivalentcircuit model, because it uses a fundamental equations. However, the simulation time increases exponentially with the complexity of a structure. Therefore, it is important to minimize the complexity of the structure without loss of accuracy at the ac ...
Synopsis by Dathan Golish
... Comments and Conclusion The MODAL software described by Créidhe O’Sullivan et al. in this paper is very interesting to someone who works in the submillimeter or terahertz fields. Working in the Steward Observatory Radio Astronomy Lab, I spend a significant amount of time designing optical systems in ...
... Comments and Conclusion The MODAL software described by Créidhe O’Sullivan et al. in this paper is very interesting to someone who works in the submillimeter or terahertz fields. Working in the Steward Observatory Radio Astronomy Lab, I spend a significant amount of time designing optical systems in ...
Light -1 - Physics
... Polarized light may be produced from unpolarized light with the aid of polarizing material (Polaroid). Such materials allow only the component of the electric field along one direction to pass through, while absorbing the field component perpendicular to this direction. The direction of polarizatio ...
... Polarized light may be produced from unpolarized light with the aid of polarizing material (Polaroid). Such materials allow only the component of the electric field along one direction to pass through, while absorbing the field component perpendicular to this direction. The direction of polarizatio ...
left-handed materials
... Where are material resonances? Most electric resonances are THz or higher. For many metals, p occurs in the UV Magnetic systems typically have resonances through the GHz (FMR, AFR; e.g., Fe, permalloy, YIG) Some magnetic systems have resonances up to THz frequencies (e.g., MnF2, FeF2) Metals such ...
... Where are material resonances? Most electric resonances are THz or higher. For many metals, p occurs in the UV Magnetic systems typically have resonances through the GHz (FMR, AFR; e.g., Fe, permalloy, YIG) Some magnetic systems have resonances up to THz frequencies (e.g., MnF2, FeF2) Metals such ...
Understand Waveguides
... approaches the cross-sectional dimensions of the waveguide. Below such frequencies, waveguides are useless as electrical transmission lines. When functioning as transmission lines, though, waveguides are considerably simpler than two-conductor cables -- especially coaxial cables -- in their manufact ...
... approaches the cross-sectional dimensions of the waveguide. Below such frequencies, waveguides are useless as electrical transmission lines. When functioning as transmission lines, though, waveguides are considerably simpler than two-conductor cables -- especially coaxial cables -- in their manufact ...
Imaging visible light using anisotropic metamaterial slab lens Jie Yao, Kun-Tong Tsai,
... permittivity (ε) and permeability (µ) [1], and a non-magnetic approach which implements the strong anisotropy of the materials [2–5]. The former approach has so far gained great success in a broad range of electromagnetic wave frequencies from microwave (GHz) range to infrared region [6–11]. However ...
... permittivity (ε) and permeability (µ) [1], and a non-magnetic approach which implements the strong anisotropy of the materials [2–5]. The former approach has so far gained great success in a broad range of electromagnetic wave frequencies from microwave (GHz) range to infrared region [6–11]. However ...
E Ni MnGa/lead-magnesium-niobate-lead titanate multiferroic heterostructure 2
... by two materials design paths, that is, as “natural” multiferroic single phase compounds, or as “artificial” multiferroic composites or heterostructures. However, most single phase multiferroic materials exhibit a magnetoelectric response at low temperatures,1 severely hindering their use in practic ...
... by two materials design paths, that is, as “natural” multiferroic single phase compounds, or as “artificial” multiferroic composites or heterostructures. However, most single phase multiferroic materials exhibit a magnetoelectric response at low temperatures,1 severely hindering their use in practic ...
Microwave tunability in a GaAs-based multiferroic heterostructure: Co MnAl/GaAs/PMN-PT
... Magnetoelectric 共ME兲 materials have recently received much attention for both their fundamental physical properties and potential to enable a new generation of electric-field tunable electronic devices.1,2 An increasing interest is devoted to a class of materials referred to as multiferroics, which ...
... Magnetoelectric 共ME兲 materials have recently received much attention for both their fundamental physical properties and potential to enable a new generation of electric-field tunable electronic devices.1,2 An increasing interest is devoted to a class of materials referred to as multiferroics, which ...
Optical response of plasmonic relief meta-surfaces
... engineered to absorb light completely if designed in such a way that the radiative decay rate of the resonance is equal to the dissipative rate. Figure 2 illustrates how the simplest intaglio and bas-relief metamaterials can achieve near-total absorption at plasmonic resonances. ‘Perfect absorption’ ...
... engineered to absorb light completely if designed in such a way that the radiative decay rate of the resonance is equal to the dissipative rate. Figure 2 illustrates how the simplest intaglio and bas-relief metamaterials can achieve near-total absorption at plasmonic resonances. ‘Perfect absorption’ ...
Magnetostriction vs. Magnetoelastic Effects
... them to change their shape when subjected to a magnetic field. The effect was first identified in 1842 by James Joule when observing a sample of nickel. This effect can cause losses due to frictional heating in susceptible ferromagnetic cores. Magnetoelastic coupling (from Sci-Tech Dictionary ) Magn ...
... them to change their shape when subjected to a magnetic field. The effect was first identified in 1842 by James Joule when observing a sample of nickel. This effect can cause losses due to frictional heating in susceptible ferromagnetic cores. Magnetoelastic coupling (from Sci-Tech Dictionary ) Magn ...
High-refractive-index composite materials for
... of which a substantial portion of the optical power is guided in dry air. In line with this scheme, several types of microstructured fibers have been designed from low-loss polymers: photonic crystal fibers [2,3], porous fibers [4–6], hollow Bragg fibers [7], and antiresonant reflecting optical wave ...
... of which a substantial portion of the optical power is guided in dry air. In line with this scheme, several types of microstructured fibers have been designed from low-loss polymers: photonic crystal fibers [2,3], porous fibers [4–6], hollow Bragg fibers [7], and antiresonant reflecting optical wave ...
Frequency Dependence of Polarization: When a dielectric is placed
... in the absence of an applied electric field. These materials are the ferroelectrics. For example, above a critical temperature, the Curie temperature θc, the spontaneous polarization is destroyed by thermal disorder. A plot of P versus ξ is shown in Figure 3.29 and demonstrates hysteresis. This beha ...
... in the absence of an applied electric field. These materials are the ferroelectrics. For example, above a critical temperature, the Curie temperature θc, the spontaneous polarization is destroyed by thermal disorder. A plot of P versus ξ is shown in Figure 3.29 and demonstrates hysteresis. This beha ...
Negative photoconductivity due to coherent trapping of electrons in
... Fig. 4. Sample resistance at low bias as a function of THz intensity: saturation of the 2p+1 and the CR transition. The influence of the bias current at constant maximum THz intensity is presented in fig. 5. With increasing bias current the sample resistance in the absence of THz radiation decreases ...
... Fig. 4. Sample resistance at low bias as a function of THz intensity: saturation of the 2p+1 and the CR transition. The influence of the bias current at constant maximum THz intensity is presented in fig. 5. With increasing bias current the sample resistance in the absence of THz radiation decreases ...
Topic Contribution to Silicon High Impedance and High Frequency
... it is determined by the material properties and its capacity to absorb, transmit or reflect the microwave signals. At present most of the knowledge of the interaction of microwaves with systems has been obtained on systems with characteristic dimensions on the order or larger than the microwaves wav ...
... it is determined by the material properties and its capacity to absorb, transmit or reflect the microwave signals. At present most of the knowledge of the interaction of microwaves with systems has been obtained on systems with characteristic dimensions on the order or larger than the microwaves wav ...
Giant microwave tunability in FeGaB/lead magnesium niobate-lead titanate multiferroic composites J. Lou,
... etc.兲 phases1–3 have led to many devices such as picotesla sensitivity magnetoelectric 共ME兲 magnetometers4,5 and electrostatically tunable microwave signal processing devices like resonators,6 phase shifters,7 filters,8 etc. Single crystal yttrium iron garnet 共YIG兲 has been the magnetic material of ...
... etc.兲 phases1–3 have led to many devices such as picotesla sensitivity magnetoelectric 共ME兲 magnetometers4,5 and electrostatically tunable microwave signal processing devices like resonators,6 phase shifters,7 filters,8 etc. Single crystal yttrium iron garnet 共YIG兲 has been the magnetic material of ...
Applied Electromagnetics
... Experimentally achieved images N. Fang, H. Lee, C. Sun, X. Zhang, Science 308, 534, (2005). written object (top) ...
... Experimentally achieved images N. Fang, H. Lee, C. Sun, X. Zhang, Science 308, 534, (2005). written object (top) ...
0 - Newport
... region. A lot of explosives and drugs have strong and unique THz absorptions and this feature makes a THz spectrometer much more valuable in detection and spectroscopic applications[21]. The amplitude of the THz field with respect to the input energy is shown in figure 4(c). By extrapolation, the cu ...
... region. A lot of explosives and drugs have strong and unique THz absorptions and this feature makes a THz spectrometer much more valuable in detection and spectroscopic applications[21]. The amplitude of the THz field with respect to the input energy is shown in figure 4(c). By extrapolation, the cu ...
PHYS 1443 * Section 501 Lecture #1
... – The direction of the field is the direction the north pole of a compass would point to – The number of lines per unit area is proportional to the strength of the magnetic field – Magnetic field lines continue inside the magnet – Since magnets always have both the poles, magnetic field lines form c ...
... – The direction of the field is the direction the north pole of a compass would point to – The number of lines per unit area is proportional to the strength of the magnetic field – Magnetic field lines continue inside the magnet – Since magnets always have both the poles, magnetic field lines form c ...
fisica e…
... at lower frequencies and it seems likely that this scheme will be most useful for lasers emitting < 2.5 THz where parasitic currents are the most problematic. The lack of success in reaching room temperature operation using GaAs/AlGaAs-based QCLs is motivating the exploration of other III-V material ...
... at lower frequencies and it seems likely that this scheme will be most useful for lasers emitting < 2.5 THz where parasitic currents are the most problematic. The lack of success in reaching room temperature operation using GaAs/AlGaAs-based QCLs is motivating the exploration of other III-V material ...