On the Energy Spectrum and Ground
... Ln|2s2 − s1 |. At s1 = s2 = 1/2 the exact ground state of (1) has a spin wave structure [4] (spin densities on neighboring lattice sites have opposite signs). 3. Discussion It is known that the next-nearest neighbor interactions (frustration) may enhance the quantum spin fluctuation and suppress the ...
... Ln|2s2 − s1 |. At s1 = s2 = 1/2 the exact ground state of (1) has a spin wave structure [4] (spin densities on neighboring lattice sites have opposite signs). 3. Discussion It is known that the next-nearest neighbor interactions (frustration) may enhance the quantum spin fluctuation and suppress the ...
Concentration-dependent absorption and emission behaviour of
... concentration up to 2 x 10~ m o l / d m were determined by transmission measurements using a conventional spectrophotometer (Beckman ACTA M 4 ) . The dye solutions were kept in fused silica cells of thicknesses down to 10 \im. For dye concentrations in the range between 0.1 and 0.5 m o l / d m the a ...
... concentration up to 2 x 10~ m o l / d m were determined by transmission measurements using a conventional spectrophotometer (Beckman ACTA M 4 ) . The dye solutions were kept in fused silica cells of thicknesses down to 10 \im. For dye concentrations in the range between 0.1 and 0.5 m o l / d m the a ...
Electron beam lithography designed silver nano
... EBL, on the other hand, is a modified SEM system that has superior properties compared to other optical or chemical patterning techniques, such as the precise placement and design of arbitrarily shaped NPs with a large selection of geometries of various sizes with fine features. It offers a high res ...
... EBL, on the other hand, is a modified SEM system that has superior properties compared to other optical or chemical patterning techniques, such as the precise placement and design of arbitrarily shaped NPs with a large selection of geometries of various sizes with fine features. It offers a high res ...
Monte Carlo simulation of light scattering in the atmosphere and
... scattering approximation – when scattered light cannot be dispersed again to the detector and only direct light is recorded – is not valid anymore. Thus, the multiple light scattering – when photons are scattered several times before being detected – has to be taken into account in the total signal ...
... scattering approximation – when scattered light cannot be dispersed again to the detector and only direct light is recorded – is not valid anymore. Thus, the multiple light scattering – when photons are scattered several times before being detected – has to be taken into account in the total signal ...
Two-Color Two-Photon Excitation Using Femtosecond Laser Pulses
... enlarging the spectral range of nowadays femtosecond Ti:Sa laser systems being used for spectroscopy and two-photon microscopy. We demonstrate measurements of 2c2p excitation fluorescence using femtosecond pulses from a Ti:Sa laser. Since these experiments were carried out using a time-gated camera ...
... enlarging the spectral range of nowadays femtosecond Ti:Sa laser systems being used for spectroscopy and two-photon microscopy. We demonstrate measurements of 2c2p excitation fluorescence using femtosecond pulses from a Ti:Sa laser. Since these experiments were carried out using a time-gated camera ...
Fano resonances in the excitation spectra of semiconductor
... favors narrow linewidths in the excitation spectrum by preventing the broadening from the alloy scattering. On the other hand, the double quantum-well structure allows a higher penetration of the heavy-hole wave function into the barrier resulting in a sizable oscillator strength for the hh3-cb1 tra ...
... favors narrow linewidths in the excitation spectrum by preventing the broadening from the alloy scattering. On the other hand, the double quantum-well structure allows a higher penetration of the heavy-hole wave function into the barrier resulting in a sizable oscillator strength for the hh3-cb1 tra ...
Electronic states in quantum dot atoms and molecules
... tion energies, analogous to the three-dimensional (3D) shell structure for atomic ionization energies. In addition, spin e ects such as a pairing of Coulomb oscillation peaks due to spin degeneracy, and modi cations of the pairing in line with Hund’s rule are all observed. In real atoms, electrons a ...
... tion energies, analogous to the three-dimensional (3D) shell structure for atomic ionization energies. In addition, spin e ects such as a pairing of Coulomb oscillation peaks due to spin degeneracy, and modi cations of the pairing in line with Hund’s rule are all observed. In real atoms, electrons a ...
FeCo magnetic nanoneedles obtained by Co-coating
... in the experimental section. It was observed that only up to 10% of Co can be deposited onto the surface of the haematite particles (figure 2(b)), while higher amounts, like 20% and 30% of Co, resulted in a different phase segregated from the haematite particles, as can be observed in figure 2(c). T ...
... in the experimental section. It was observed that only up to 10% of Co can be deposited onto the surface of the haematite particles (figure 2(b)), while higher amounts, like 20% and 30% of Co, resulted in a different phase segregated from the haematite particles, as can be observed in figure 2(c). T ...
Chapter 3 - Higher Education | Kendall Hunt Publishing
... exactly like every other part. The salt can be separated from the water by physical means. Seawater and air are also examples of homogeneous mixtures. We know that there are two types of homogeneous matter: pure substances and homogeneous mixtures. According to this classification scheme, matter can ...
... exactly like every other part. The salt can be separated from the water by physical means. Seawater and air are also examples of homogeneous mixtures. We know that there are two types of homogeneous matter: pure substances and homogeneous mixtures. According to this classification scheme, matter can ...
Superprism phenomena in planar photonic crystals
... Kosaka’s and Lin’s results is in the physical understanding of the angular dispersion phenomenon. Kosaka et al. recognized the anisotropy in the dispersion relationship and determined the light propagation direction via the group velocity, using wavevector diagrams discussed in detail by Russel [10] ...
... Kosaka’s and Lin’s results is in the physical understanding of the angular dispersion phenomenon. Kosaka et al. recognized the anisotropy in the dispersion relationship and determined the light propagation direction via the group velocity, using wavevector diagrams discussed in detail by Russel [10] ...
arXiv:quant-ph/0602132 v2 20 Feb 2006
... the diffraction limit of the read-out optics that prevents data storage densities beyond those of present day systems. The trend of compacting more information into an optical disc therefore primarily relies on the use of shorter wavelength lasers to achieve smaller diffraction limited spot sizes. O ...
... the diffraction limit of the read-out optics that prevents data storage densities beyond those of present day systems. The trend of compacting more information into an optical disc therefore primarily relies on the use of shorter wavelength lasers to achieve smaller diffraction limited spot sizes. O ...
Ultra-low power parametric frequency conversion in a silicon
... and is limited by the tunable filters used in our experimental setup. Note that the time scale of the operation of the device is limited by the bandwidth of the resonator. The devices demonstrated here can be used for optical data rates as high as 10 Gbit/s [27]. We measure the FWM efficiency as a f ...
... and is limited by the tunable filters used in our experimental setup. Note that the time scale of the operation of the device is limited by the bandwidth of the resonator. The devices demonstrated here can be used for optical data rates as high as 10 Gbit/s [27]. We measure the FWM efficiency as a f ...
Laser and its applications
... The resonator is an optical “feed back device” that directs photons back and forth through the laser medium. Resonator or “optical activity” consists of a pair of carefully aligned plane or curved mirrors (see figure 2). One of them is chosen with a reflectivity 100% as possible. The other mirror is ...
... The resonator is an optical “feed back device” that directs photons back and forth through the laser medium. Resonator or “optical activity” consists of a pair of carefully aligned plane or curved mirrors (see figure 2). One of them is chosen with a reflectivity 100% as possible. The other mirror is ...
Temperature Tuning Characteristics of Periodically Poled Lithium
... With the above setup, temperature tuning was carried out on the PPLN sample by varying the temperature of the micro oven from 80–140°C in steps of 1°C, initially, but as the blue light power being detected increased and the temperature was approaching phase matching temperature the step size was red ...
... With the above setup, temperature tuning was carried out on the PPLN sample by varying the temperature of the micro oven from 80–140°C in steps of 1°C, initially, but as the blue light power being detected increased and the temperature was approaching phase matching temperature the step size was red ...
Esters of Nitric Acid as Electron Acceptors
... [14] J. N . A s h l e y , W . G . Leeds, J. Chem. S o c , (1957), 2706. [15] T. U r b a ń s k i , Chemistry and technology of explosives, Vol. II, Pergamon Press, Oxford — P W N , Warszawa, 1965. [16] J. H a c k e l , Roczniki Chem., 16 (1936), 213. [17] N . S. M a r a n s , D. E . E l r i c k , and ...
... [14] J. N . A s h l e y , W . G . Leeds, J. Chem. S o c , (1957), 2706. [15] T. U r b a ń s k i , Chemistry and technology of explosives, Vol. II, Pergamon Press, Oxford — P W N , Warszawa, 1965. [16] J. H a c k e l , Roczniki Chem., 16 (1936), 213. [17] N . S. M a r a n s , D. E . E l r i c k , and ...
Dependences of the group velocity for
... amount of the SH waves which contributes to the dragging. The red empty diamond line shows the pulse acceleration case. The smaller wave-vector mismatching can lead to larger fractional time delay but with a lower quality factor. The reason is similar with the explanation given in Fig. 2. Another fa ...
... amount of the SH waves which contributes to the dragging. The red empty diamond line shows the pulse acceleration case. The smaller wave-vector mismatching can lead to larger fractional time delay but with a lower quality factor. The reason is similar with the explanation given in Fig. 2. Another fa ...
Tutorial on Optomechanical Beam Steering Mechanisms
... dependant on wedge angle and rotation rate. If the wedges are not matched exactly there can be dead zones that cannot be pointed to. It is difficult to formulate control laws to position wedges to give predictable result – generally used manually to set angle and then fixed in place or in constant m ...
... dependant on wedge angle and rotation rate. If the wedges are not matched exactly there can be dead zones that cannot be pointed to. It is difficult to formulate control laws to position wedges to give predictable result – generally used manually to set angle and then fixed in place or in constant m ...
Lab 4: Diffraction of Light
... ter. One half of that number will give you the distance the holder and position it so that it is normal to the between the center of the pattern and the first diffrac- laser beam. Sketch and describe the diffraction pattion minimum. Measure the distance D between the tern. Calculate the angle by whi ...
... ter. One half of that number will give you the distance the holder and position it so that it is normal to the between the center of the pattern and the first diffrac- laser beam. Sketch and describe the diffraction pattion minimum. Measure the distance D between the tern. Calculate the angle by whi ...
Appendix D – Raman Spectra
... present, with the second peak much smaller and lower in Raman shift than the first, as is expected by past results [6]. For the 532 nm sample, the signal was much noisier. In the RBM range, six peaks were present, but were much more difficult to detect and were only measured after a peak-selection s ...
... present, with the second peak much smaller and lower in Raman shift than the first, as is expected by past results [6]. For the 532 nm sample, the signal was much noisier. In the RBM range, six peaks were present, but were much more difficult to detect and were only measured after a peak-selection s ...
e - Physlab
... is confined to a region of space the higher its kinetic energy will be. In an atom the electrons are confined by the Coulomb potential of the nucleus. The competition between the confining nature of the potential and the liberating tendency of the uncertainty principle gives rise to various quantum mec ...
... is confined to a region of space the higher its kinetic energy will be. In an atom the electrons are confined by the Coulomb potential of the nucleus. The competition between the confining nature of the potential and the liberating tendency of the uncertainty principle gives rise to various quantum mec ...
X-ray fluorescence
X-ray fluorescence (XRF) is the emission of characteristic ""secondary"" (or fluorescent) X-rays from a material that has been excited by bombarding with high-energy X-rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis, particularly in the investigation of metals, glass, ceramics and building materials, and for research in geochemistry, forensic science and archaeology.