Nature: News and Views
... material can become. A second, simi- Figure 1 | Reverse swing. Light waves (arrows) from an external source in the visible spectrum, these pairs behave as small, high-frequency bar lar quantity, the permittivity of a will, at the interface between two materials of different refractive magnets, muc ...
... material can become. A second, simi- Figure 1 | Reverse swing. Light waves (arrows) from an external source in the visible spectrum, these pairs behave as small, high-frequency bar lar quantity, the permittivity of a will, at the interface between two materials of different refractive magnets, muc ...
Photoinduced handedness switching in terahertz chiral metamolecules ARTICLE
... symmetry, such that the eigenmodes of the light propagating along normal incidence are circularly polarized. The unit cell has a lateral dimension of 50 µm, which is much less than the resonant wavelength of a few hundred micrometres in the terahertz frequency range, qualifying the chiral artificial ...
... symmetry, such that the eigenmodes of the light propagating along normal incidence are circularly polarized. The unit cell has a lateral dimension of 50 µm, which is much less than the resonant wavelength of a few hundred micrometres in the terahertz frequency range, qualifying the chiral artificial ...
Millimeter-wave and Terahertz Devices Q. Hu
... at Purdue University, and Mr. John Reno at Sandia National Lab. Semiconductor quantum wells are human-made quantum mechanical systems in which the energy levels can be designed and engineered to be of any value. Consequently, unipolar lasers based on intersubband transitions (electrons that make las ...
... at Purdue University, and Mr. John Reno at Sandia National Lab. Semiconductor quantum wells are human-made quantum mechanical systems in which the energy levels can be designed and engineered to be of any value. Consequently, unipolar lasers based on intersubband transitions (electrons that make las ...
Zero loss magnetic metamaterials using powered
... A photograph of a unit cell is shown in Fig. 1(a). The sensing and driven parts consist of a 36 mm diameter copper loop and a SRR that is loaded with a 1 pF capacitor, resonant near 562 MHz, which is within the operation bandwidth of the RF amplifier. There are 3 mm-thick foam layers with a permitti ...
... A photograph of a unit cell is shown in Fig. 1(a). The sensing and driven parts consist of a 36 mm diameter copper loop and a SRR that is loaded with a 1 pF capacitor, resonant near 562 MHz, which is within the operation bandwidth of the RF amplifier. There are 3 mm-thick foam layers with a permitti ...
Magnetism and Matter
... Magnetic field or magnetic flux density B will form at some point in space when an external free current loop is switched on or magnetic material is placed at that location. A charge, q moving with velocity, v generates a field, B in a perpendicular direction of its velocity vector. ...
... Magnetic field or magnetic flux density B will form at some point in space when an external free current loop is switched on or magnetic material is placed at that location. A charge, q moving with velocity, v generates a field, B in a perpendicular direction of its velocity vector. ...
ECE 463/626: Optoelectronics Instructor: Prof. H. Grebel, Rm 302
... Course Description: The course addresses electronic and optical devices on the micron and nano-scales. Nano-scale optoelectronic devices (optical devices controlled by electronics and electronic devices controlled by optics) find themselves in the forefront of communication and sensing systems. Trad ...
... Course Description: The course addresses electronic and optical devices on the micron and nano-scales. Nano-scale optoelectronic devices (optical devices controlled by electronics and electronic devices controlled by optics) find themselves in the forefront of communication and sensing systems. Trad ...
here - Gonit Sora
... •μ>0, Є>0, being most known materials, natural or otherwise. •μ>0, Є<0, being materials not well investigated. •μ<0, Є>0, also being materials not well investigated •μ<0, Є<0, where these materials do not exist naturally(Metamaterials) ...
... •μ>0, Є>0, being most known materials, natural or otherwise. •μ>0, Є<0, being materials not well investigated. •μ<0, Є>0, also being materials not well investigated •μ<0, Є<0, where these materials do not exist naturally(Metamaterials) ...
IMAGING WITH THZ PULSES TX 7725
... delay. The measured signal is the coherent superposition of the electric fields from these two arms. Due to the Gouy phase shift acquired by the signal beam as it passes through a focus, it is 180” out of phase from the reference beam [9]. As a result, if the sample reflects the THz pulse without di ...
... delay. The measured signal is the coherent superposition of the electric fields from these two arms. Due to the Gouy phase shift acquired by the signal beam as it passes through a focus, it is 180” out of phase from the reference beam [9]. As a result, if the sample reflects the THz pulse without di ...
3.024 Electrical, Optical, and Magnetic Properties of Materials Spring 2012 Recitation 14 Outline:
... realigning the dipoles due to thermal history randomizing the dipole directions. The characterization of this effect is made through a hysteresis curve. A general hysteresis curve is shown below with various points of interest labeled. Materials with low coercivity are known as soft magnets and are ...
... realigning the dipoles due to thermal history randomizing the dipole directions. The characterization of this effect is made through a hysteresis curve. A general hysteresis curve is shown below with various points of interest labeled. Materials with low coercivity are known as soft magnets and are ...
Non-destructive terahertz imaging of illicit drugs using spectral
... a vinyl plastic bag or a tablet, and not the type of the drug, providing insufficient grounds for opening the envelope for examination. Trace detection and canine detection, on the other hand, can only be effective if there are detectable signs outside the envelope, such as a scent or trace amounts ...
... a vinyl plastic bag or a tablet, and not the type of the drug, providing insufficient grounds for opening the envelope for examination. Trace detection and canine detection, on the other hand, can only be effective if there are detectable signs outside the envelope, such as a scent or trace amounts ...
Atomic and Molecular Physics for Physicists Ben-Gurion University of the Negev
... The electric susceptibility χe of a dielectric material is a measure of how easily it polarizes in response to an electric field. This, in turn, determines the electric permittivity of the material and thus influences many other phenomena in that medium, from the capacitance of capacitors to the spe ...
... The electric susceptibility χe of a dielectric material is a measure of how easily it polarizes in response to an electric field. This, in turn, determines the electric permittivity of the material and thus influences many other phenomena in that medium, from the capacitance of capacitors to the spe ...
ppt - University Of Oregon
... NMR and Optical Pumping have the same basic concept Optical Pumping It is a two level system that electronically excites the constituents of a medium into another energy state. i.e. Laser ...
... NMR and Optical Pumping have the same basic concept Optical Pumping It is a two level system that electronically excites the constituents of a medium into another energy state. i.e. Laser ...
A Reliable Method For Extraction Of Material Parameters In
... a modification of the substrate surface (ionic implantation, chemical attack, etc.) one can show easily that the refractive index of the substrate has to be used instead of in (3a). In fact, the sample takes the place of a part of the substrate. It is also the case for the characterization of hygros ...
... a modification of the substrate surface (ionic implantation, chemical attack, etc.) one can show easily that the refractive index of the substrate has to be used instead of in (3a). In fact, the sample takes the place of a part of the substrate. It is also the case for the characterization of hygros ...
Direct measurement of terahertz wavefront pulses using 2D electro
... In the visible spectral region, Hartmann masks, invented a century ago, are used to perform optical metrology for a wide variety of applications [1]. However, in THz spectral range, it is well-known that spatiotemporal profiles of THz transient fields can also be directly determined through electro- ...
... In the visible spectral region, Hartmann masks, invented a century ago, are used to perform optical metrology for a wide variety of applications [1]. However, in THz spectral range, it is well-known that spatiotemporal profiles of THz transient fields can also be directly determined through electro- ...
Terahertz Technology
... self-sustain any current flowing through them), the presence of gaps leads to a resonant response, with charge accumulating alternately on one side of the gap and then the other, sloshing back and forth through the rings rather as a mass vibrates back and forth on a spring. At frequencies near the c ...
... self-sustain any current flowing through them), the presence of gaps leads to a resonant response, with charge accumulating alternately on one side of the gap and then the other, sloshing back and forth through the rings rather as a mass vibrates back and forth on a spring. At frequencies near the c ...
Shaping optical space with metamaterials
... The fabrication of miniature metal helices as a metamaterial sensitive to optical or IR frequencies, however, remained out of reach until last year. Thanks to direct laser writing (DLW), which can be viewed as the 3D analog of 2D electron-beam lithography, one can tightly focus femtosecond laser pul ...
... The fabrication of miniature metal helices as a metamaterial sensitive to optical or IR frequencies, however, remained out of reach until last year. Thanks to direct laser writing (DLW), which can be viewed as the 3D analog of 2D electron-beam lithography, one can tightly focus femtosecond laser pul ...
magnetic resonator
... effect. As one example, the hysteresis-type dependence of the magnetic permeability on the field intensity is theoretically studied. It is the right time to start the new topic--nonlinear effects in metamaterials. The engineering of nonlinear composite materials will open a number of applications ...
... effect. As one example, the hysteresis-type dependence of the magnetic permeability on the field intensity is theoretically studied. It is the right time to start the new topic--nonlinear effects in metamaterials. The engineering of nonlinear composite materials will open a number of applications ...
metamaterial_absorber
... absorber include emitters, sensors, spatial light modulators, infrared camouflage, wireless communication, and use in solar photovoltaics and thermophotovoltaics. In addition, the advent of metamaterial absorbers enable researchers to further understand the theory of metamaterials which is derived f ...
... absorber include emitters, sensors, spatial light modulators, infrared camouflage, wireless communication, and use in solar photovoltaics and thermophotovoltaics. In addition, the advent of metamaterial absorbers enable researchers to further understand the theory of metamaterials which is derived f ...
Reports for the two projects on Bisosensors have been combined
... measurable shift of the resonator’s resonance frequency. Several approaches for THz biosensors applying this feature are currently investigated [e.g. 3,4,5], aiming at a high sensitivity since the amount of probe material is very low. The smaller the required amount of material and the larger the fr ...
... measurable shift of the resonator’s resonance frequency. Several approaches for THz biosensors applying this feature are currently investigated [e.g. 3,4,5], aiming at a high sensitivity since the amount of probe material is very low. The smaller the required amount of material and the larger the fr ...
Slide 1
... J.B. Pendry, A.J. Holden, D.J. Robbins, and W.J. Stewart, IEEE transactions on microwave theory and techniques, 47, 2075 (1999). ...
... J.B. Pendry, A.J. Holden, D.J. Robbins, and W.J. Stewart, IEEE transactions on microwave theory and techniques, 47, 2075 (1999). ...
DONNANEfficiencyandSpectrum2014
... good coupling between the bias field and the carriers is crucial for enhancing the efficiency of the device. Figure 4 shows the evolution of the electric field inside the substrate with an increasing distance from the air-semiconductor interface for PCAs with different gaps under the same bias fiel ...
... good coupling between the bias field and the carriers is crucial for enhancing the efficiency of the device. Figure 4 shows the evolution of the electric field inside the substrate with an increasing distance from the air-semiconductor interface for PCAs with different gaps under the same bias fiel ...
Electromagnetic Spectrum Web Quest
... Use http://www.qrg.northwestern.edu/projects/vss/docs/thermal/3-what-makes-em-radiation.html to answer the following (the general site http://www.qrg.northwestern.edu/projects/vss/docs/Communications/2-more-about-radio-waves.html can also be used on other questions) 15) Why do materials absorb some ...
... Use http://www.qrg.northwestern.edu/projects/vss/docs/thermal/3-what-makes-em-radiation.html to answer the following (the general site http://www.qrg.northwestern.edu/projects/vss/docs/Communications/2-more-about-radio-waves.html can also be used on other questions) 15) Why do materials absorb some ...
Electromagnetic Black Hole Made of Metamaterials
... Lossless circular shell—I-shaped metamaterials (40 layers) ...
... Lossless circular shell—I-shaped metamaterials (40 layers) ...
Deliverable 9: Blueprints of ICT relevant demonstrators As pointed
... as thin-film optical isolators. In addition, we have proposed to use photonic metamaterials that can be used as tunable switches at THz frequencies, and finally we have proposed to use photonic metamaterials for electro-optic modulation. Chirality only exists in truly three-dimensional structures, i ...
... as thin-film optical isolators. In addition, we have proposed to use photonic metamaterials that can be used as tunable switches at THz frequencies, and finally we have proposed to use photonic metamaterials for electro-optic modulation. Chirality only exists in truly three-dimensional structures, i ...