Invisibility cloak - Department of Theoretical Physics
... The cloak has been tested and the electric field around the cloak has been measured and compared with the computer simulations. The object to be shielded was a Cu cylinder that exactly fit the inner radius of the cloak. Fig.5 shows the results, including the simulation of the cloak with the exact ma ...
... The cloak has been tested and the electric field around the cloak has been measured and compared with the computer simulations. The object to be shielded was a Cu cylinder that exactly fit the inner radius of the cloak. Fig.5 shows the results, including the simulation of the cloak with the exact ma ...
A mobile, high-precision atom-interferometer and its
... The gravitational force is one of four fundamental interactions in physics. Though it is about 1029 to 1038 times smaller than the electromagnetic, the weak, and the strong interaction, it plays an important role on macroscopic scales such as in the field of cosmology. But also in everyday life we a ...
... The gravitational force is one of four fundamental interactions in physics. Though it is about 1029 to 1038 times smaller than the electromagnetic, the weak, and the strong interaction, it plays an important role on macroscopic scales such as in the field of cosmology. But also in everyday life we a ...
FERMI GBM detections of four AXPs at soft gamma-rays
... two orders of magnitude higher than what can be explained from rotational energy loss, indicating that SGR 1806-20 is not rotation-powered. Moreover, they derived a magnetic field strength of ∼ 8 × 1014 Gauss by assuming that the rotational energy loss is due to magnetic dipole braking (to be discus ...
... two orders of magnitude higher than what can be explained from rotational energy loss, indicating that SGR 1806-20 is not rotation-powered. Moreover, they derived a magnetic field strength of ∼ 8 × 1014 Gauss by assuming that the rotational energy loss is due to magnetic dipole braking (to be discus ...
Theoretical study of light and sound interaction in phoxonic
... • Electrostriction effect: electrostriction is a property of dielectric media, where a mechanical stress appear under the application of electric field [13] • Optomechanical effect: mechanical vibration is induced by radiation pressure and shifts the optical resonance[14, 15] ...
... • Electrostriction effect: electrostriction is a property of dielectric media, where a mechanical stress appear under the application of electric field [13] • Optomechanical effect: mechanical vibration is induced by radiation pressure and shifts the optical resonance[14, 15] ...
Basic Wavefront Aberration Theory for Optical Metrology
... which is good for Strehl ratios as small as 0.1. Once the normalized intensity at diffraction focus has been determined, the quality of the optical system may be ascertained using the Marécha1 criterion. The Marécha1 criterion states that a system is regarded as well corrected if the normalized inte ...
... which is good for Strehl ratios as small as 0.1. Once the normalized intensity at diffraction focus has been determined, the quality of the optical system may be ascertained using the Marécha1 criterion. The Marécha1 criterion states that a system is regarded as well corrected if the normalized inte ...
Design and Analysis of Integrated Optical Waveguide Structures and
... resulting in almost perfect transmission of the signal. Additionally, tapered waveguides were investigated for an optimized light coupling between high-aspect-ratio devices. Here, adiabatic down-tapered waveguides were designed for the elimination of higher-order modes and perfect signal transmissio ...
... resulting in almost perfect transmission of the signal. Additionally, tapered waveguides were investigated for an optimized light coupling between high-aspect-ratio devices. Here, adiabatic down-tapered waveguides were designed for the elimination of higher-order modes and perfect signal transmissio ...
Thesis Manuscript - Materials Physics Center
... nanostructures characterised by narrow subnanometric gaps between nanoparticles, the quantum effects due to the non-local screening and tunneling emerge. These quantum effects are not captured by standard classical descriptions which is then a real challenge for the theory. Indeed, (i) Nowadays tech ...
... nanostructures characterised by narrow subnanometric gaps between nanoparticles, the quantum effects due to the non-local screening and tunneling emerge. These quantum effects are not captured by standard classical descriptions which is then a real challenge for the theory. Indeed, (i) Nowadays tech ...
Paraxial Optics
... geometrical optics propose that the paraxial treatment should be included as part of the first approach to the subject.[12–16] The paraxial approximation explains how light propagates along an optical system when rays are close to the optical axis. Roughly speaking, paraxial optics applies when the ...
... geometrical optics propose that the paraxial treatment should be included as part of the first approach to the subject.[12–16] The paraxial approximation explains how light propagates along an optical system when rays are close to the optical axis. Roughly speaking, paraxial optics applies when the ...
META`15 New York
... PLENARY SPEAKERS Sir Michael Berry University of Bristol, UK The singularities of light : intensity, phase, polarization Sir Michael Berry, is a world-renowned physicist famous for the discovery of geometric phase called the Berry’s effects in quantum mechanics ; He specializes in semiclassical phy ...
... PLENARY SPEAKERS Sir Michael Berry University of Bristol, UK The singularities of light : intensity, phase, polarization Sir Michael Berry, is a world-renowned physicist famous for the discovery of geometric phase called the Berry’s effects in quantum mechanics ; He specializes in semiclassical phy ...
Atom-Wall interaction
... ground state wavefunction). Remarkably, this surface interaction potential is not isotropic; however, the anisotropy vanishes in the common situation of an atom featuring a spherical symmetry, as most of atom ground states. It has been soon predicted by Casimir and Polder (1948), in a work parallel ...
... ground state wavefunction). Remarkably, this surface interaction potential is not isotropic; however, the anisotropy vanishes in the common situation of an atom featuring a spherical symmetry, as most of atom ground states. It has been soon predicted by Casimir and Polder (1948), in a work parallel ...
ELEC425 lab 5
... BTC bidirectional coupler at Port 1. Cleave the end of the fiber. (You can actually use any of the four ports of the coupler, but using Port 1 will allow you to use the notation of the previous discussion.) 2. Splice a one-meter length of F-MLD fiber to the cleaved fiber as you learned to do in LAB ...
... BTC bidirectional coupler at Port 1. Cleave the end of the fiber. (You can actually use any of the four ports of the coupler, but using Port 1 will allow you to use the notation of the previous discussion.) 2. Splice a one-meter length of F-MLD fiber to the cleaved fiber as you learned to do in LAB ...
2004 “The Physics of attosecond light pulses”
... equidistant frequencies can result only in a periodic intensity profile in the time domain, i.e. a comb (or ‘train’) of pulses. The ‘extraction’ of a single pulse from such a train is in principle possible, although its period is only about 1 fs, i.e. too fast for the usual electronic devices. 4 Not ...
... equidistant frequencies can result only in a periodic intensity profile in the time domain, i.e. a comb (or ‘train’) of pulses. The ‘extraction’ of a single pulse from such a train is in principle possible, although its period is only about 1 fs, i.e. too fast for the usual electronic devices. 4 Not ...
Spin light of neutrino in matter and electromagnetic fields
... The process we are studying in this paper has never been considered before. We discover a mechanism for electromagnetic radiation generated by the neutrino magnetic (and/or electric) moment rotation which occurs due to electroweak interaction with the background environment. It should be noted that ...
... The process we are studying in this paper has never been considered before. We discover a mechanism for electromagnetic radiation generated by the neutrino magnetic (and/or electric) moment rotation which occurs due to electroweak interaction with the background environment. It should be noted that ...
Herschel/PACS spectroscopy of NGC 4418 and Arp 220: H2O
... and covering a field of 47 × 47 (Poglitsch et al. 2010). ...
... and covering a field of 47 × 47 (Poglitsch et al. 2010). ...
reflectance measurement and modelling of high reflectivity
... is the maximum amount of light that can be reflected by the sample and can not be increased by increase film thickness or smoothness. Reflectance measurements are typically divided into two categories, which are internal reflectance measurement by using an attenuated total reflectance (ATR) element ...
... is the maximum amount of light that can be reflected by the sample and can not be increased by increase film thickness or smoothness. Reflectance measurements are typically divided into two categories, which are internal reflectance measurement by using an attenuated total reflectance (ATR) element ...
Theoretical studies of frustrated magnets with dipolar interactions
... extent, such models are able to qualitatively expose many experimentally observed phenomena. But often, to account for complex behavior of magnetic matter, such models have to be refined by including more terms in Hamiltonian. The compound LiHox Y1−x F4 , by increasing concentration of nonmagnetic y ...
... extent, such models are able to qualitatively expose many experimentally observed phenomena. But often, to account for complex behavior of magnetic matter, such models have to be refined by including more terms in Hamiltonian. The compound LiHox Y1−x F4 , by increasing concentration of nonmagnetic y ...