generation and propagation of optical vortices
... Vortices are fascinating topological features which are ubiquitous throughout the Universe. They play an important role in a great number of physical processes ranging from microscopic structure of superfluid helium1–4 to global weather patterns5 and possibly to formation of matter in the Big Bang.6 ...
... Vortices are fascinating topological features which are ubiquitous throughout the Universe. They play an important role in a great number of physical processes ranging from microscopic structure of superfluid helium1–4 to global weather patterns5 and possibly to formation of matter in the Big Bang.6 ...
New Approaches to Gyroscopic Lasers
... gain medium for the gyroscope. Both neodymium doped and erbium ytterbium co-doped phosphate glass lasers were constructed. Initially linear cavity designs were constructed to test the suitability of the gain media. Both laser systems employed longitudinal laser diode pumping. Thirty six perimeter ri ...
... gain medium for the gyroscope. Both neodymium doped and erbium ytterbium co-doped phosphate glass lasers were constructed. Initially linear cavity designs were constructed to test the suitability of the gain media. Both laser systems employed longitudinal laser diode pumping. Thirty six perimeter ri ...
Multistep Parametric Processes in Nonlinear Optics
... Both the three-wave mixing and SHG processes present an example of a single-phase-matched parametric process because it is controlled by a single phase-matching parameter ∆k. This kind of parametric processes can be described as a two-step cascading interaction which includes: (i) the generation of ...
... Both the three-wave mixing and SHG processes present an example of a single-phase-matched parametric process because it is controlled by a single phase-matching parameter ∆k. This kind of parametric processes can be described as a two-step cascading interaction which includes: (i) the generation of ...
Full-Text PDF
... 658 nm, the Cr/Au and Ti/Au films exhibit low-sensitivity with large full width at half maximum (FWHM) values of approximately 3°[9–11]. However, these conventional SPR sensors (Cr/Au) can cause problems in the adhesion layer, such as metal interdiffusion, low optical transmission, large FWHM, and a ...
... 658 nm, the Cr/Au and Ti/Au films exhibit low-sensitivity with large full width at half maximum (FWHM) values of approximately 3°[9–11]. However, these conventional SPR sensors (Cr/Au) can cause problems in the adhesion layer, such as metal interdiffusion, low optical transmission, large FWHM, and a ...
Displacement laser interferometry with sub-nanometer
... Development in industry is asking for improved resolution and higher accuracy in mechanical measurement. Together with miniaturization the demand for sub nanometer uncertainty on dimensional metrology is increasing rapidly. Displacement laser interferometers are used widely as precision displacement ...
... Development in industry is asking for improved resolution and higher accuracy in mechanical measurement. Together with miniaturization the demand for sub nanometer uncertainty on dimensional metrology is increasing rapidly. Displacement laser interferometers are used widely as precision displacement ...
A Review of the 0.1 Reconnection Rate Problem
... speed. That this is the case has been known for many years, but developing a theoretical understanding of why has been extremely challenging. If we already know the typical rate, why is it important to solve this problem? The rate of reconnection is likely related to the efficiency of particle accel ...
... speed. That this is the case has been known for many years, but developing a theoretical understanding of why has been extremely challenging. If we already know the typical rate, why is it important to solve this problem? The rate of reconnection is likely related to the efficiency of particle accel ...
Quantum Hall Effect and Electromechanics in Graphene
... studied the electromechanics of graphene resonator in ultra clean devices in the quantum Hall regime at low temperature. We measured the two probe resistance of these devices while mechanically perturbing it at different values of the magnetic field. The system shows change in resistance upon mechan ...
... studied the electromechanics of graphene resonator in ultra clean devices in the quantum Hall regime at low temperature. We measured the two probe resistance of these devices while mechanically perturbing it at different values of the magnetic field. The system shows change in resistance upon mechan ...
Investigating Naturally Occurring 3
... suppression. In addition to this, theoretical modelling was performed on a variety of gyroid geometries. The gyroid photonic structure found in the wing scales of P. sesostris was determined to be highly optimised to reflect the largest range of frequencies possible from this geometry, also aiding i ...
... suppression. In addition to this, theoretical modelling was performed on a variety of gyroid geometries. The gyroid photonic structure found in the wing scales of P. sesostris was determined to be highly optimised to reflect the largest range of frequencies possible from this geometry, also aiding i ...
STED Microscopy
... illuminating wavelength since the corresponding energy has to match the energy gap of the desired state transition (i.e., from the excited state to the ground state). However, the STED wavelength can also induce other transitions. Of these, excitation from the electronic ground state has to be espec ...
... illuminating wavelength since the corresponding energy has to match the energy gap of the desired state transition (i.e., from the excited state to the ground state). However, the STED wavelength can also induce other transitions. Of these, excitation from the electronic ground state has to be espec ...
OPTICAL ISOMERISM
... POLARIMETERS can be used to analyse the effect optical isomers have on plane polarised light: ...
... POLARIMETERS can be used to analyse the effect optical isomers have on plane polarised light: ...
Synthesis, Characterization and Properties of Copper Clusters
... post-treatments parameters were examined in order to improve the synthesis method. The as-synthesized CuCLs were thoroughly characterized by using different techniques, such as: UV-Vis spectroscopy, fluorescence, mass spectrometry, X-ray photoelectron spectroscopy, non-contact atomic force microscop ...
... post-treatments parameters were examined in order to improve the synthesis method. The as-synthesized CuCLs were thoroughly characterized by using different techniques, such as: UV-Vis spectroscopy, fluorescence, mass spectrometry, X-ray photoelectron spectroscopy, non-contact atomic force microscop ...
Lya escape from z~ 0.03 star-forming galaxies: the dominant role of
... contamination with the geocoronal and Milky Way (MW) Lyα lines. We cover a factor of three in redshift, which makes it possible to study the effect of distance on the observed properties of Lyα. In addition, we cover a broad range in oxygen abundance, 12 + log (O/H) = 7.9 − 9.1, which makes it possi ...
... contamination with the geocoronal and Milky Way (MW) Lyα lines. We cover a factor of three in redshift, which makes it possible to study the effect of distance on the observed properties of Lyα. In addition, we cover a broad range in oxygen abundance, 12 + log (O/H) = 7.9 − 9.1, which makes it possi ...
4.2.6.1. FR646-Acid - Publikationsserver der Universität Regensburg
... optical window of blood and other biological material (see fig. 1.1) is in the range of 600-900 nm [2, 3]. In addition, light of longer wavelength penetrates tissue more easily due to the inverse relationship of the scatter of light to the fourth power of the wavelength (Tyndall) which makes longer ...
... optical window of blood and other biological material (see fig. 1.1) is in the range of 600-900 nm [2, 3]. In addition, light of longer wavelength penetrates tissue more easily due to the inverse relationship of the scatter of light to the fourth power of the wavelength (Tyndall) which makes longer ...
