The Experts below are selected from a list of 39 Experts worldwide ranked by ideXlab platform
Fischer, Ulrich C. - One of the best experts on this subject based on the ideXlab platform.
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On Photon Spin and the Electrodynamic Origin of the charge of the Electron
2016Co-Authors: Fischer, Ulrich C.Abstract:We recently performed experiments on the transfer of photon spin to electron orbital angular momentum. For an interpretation of the experimental results we used a classical electrodynamic model of the photon as a propagating electromagnetic solitary wave which is developed in detail here. A linearly polarized monochromatic photon is considered as a propagating solitary electromagnetic wave of finite energy hf which carries an angular momentum h/2pi with the frequency f and Plancks Constant h. This model has, apart from being a tool for an interpretation of our experimental results, far reaching consequences of fundamental relevance and guides us to an outline to a unified quantum theory of electromagnetism and gravitation including an explanation of the electrodynamic origin of the quantized charge of an electron.Comment: 11 pages, 1 figure, 1 table added, correction in eq 1,2; new numbering of equations, corrected derivation of electromagnetic properties of photon, modified derivation of electromagnetic origin of the charge of the electron, modified outline of quantum topolog
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On the Coupling of Photon Spin to Electron Orbital Angular Momentum
2016Co-Authors: Fischer, Ulrich C., Fontein Florian, Fuchs Harald, Salut Roland, Lefier Yannick, Grosjean ThierryAbstract:Partially gold coated 90 degree glass wedges and a semi - infinite slit in a thin film of gold ending in a conducting nano-junction serve as samples to investigate the transfer of photon spin to electron orbital angular momentum. These structures were specifically designed as samples where an incident beam of light is retroreflected. Since in the process of retroreflection the turning sense of a circularly polarized beam of light does not change and the direction of propagation is inverted, the photon spin is inverted. Due to conservation of angular momentum a transfer of photon spin to electron orbital angular momentum of conduction electrons occurs. In the structures a circular movement of electrons is blocked and therefore the transfered spin can be detected as a photovoltage due to an electromotive force which is induced by the transfer of angular momentum. Depending on the polarization of the incident beam, a maximum photovoltage of about 0,2 micro V was measured for both structures. The results are interpreted in terms of a classical electrodynamic model of the monochromatic linearly polarized photon as a propagating solitary electromagnetic wave of finite energy hf which carries an angular momentum h/2pi which is elaborated elsewhere where h is Plancks Constant and f the frequency of light. The relative values of the measured photovoltages for different polarizations can well be explained by the electrodynamic model of a photon and an associated spin angular momentum. The absolute values of the measured photovoltages are also consistent with the interpretation. The observed effects are closely related to the lateral Fedorov Imbert shift of focused beams in optics and the optical spin Hall effect and to other non linear optical effects such as the inverse faraday effect for which a new interpretation is given here in terms of the electrodynamic model of the photon and its spin.Comment: 20 pages, 8 figure
A Beckwith - One of the best experts on this subject based on the ideXlab platform.
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gravitons gravitinos and using machs principle to make a statement of equivalent information in a gravitino graviton correspondence of critical information exchange from electro weak to present eras
viXra, 2012Co-Authors: A BeckwithAbstract:Makes linkage between electro weak information and present day information in terms of a T duality between Gravitinos and Gravitons. Elucidates how information content as underlined by Mach's principle in the electro weak to present era as being similar in information storage with respect to gravitinos ( EW ), and Gravitons (today). Motivation is to provide a reason for why the Plancks Constant and fine structure Constant remain invariant rather than change over time, as suggested by Dirac and others .
Thierry Grosjean - One of the best experts on this subject based on the ideXlab platform.
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On the Coupling of Photon Spin to Electron Orbital Angular Momentum
arXiv: General Physics, 2016Co-Authors: Ulrich C. Fischer, Florian Fontein, Harald Fuchs, Roland Salut, Yannick Lefier, Thierry GrosjeanAbstract:Partially gold coated 90 degree glass wedges and a semi - infinite slit in a thin film of gold ending in a conducting nano-junction serve as samples to investigate the transfer of photon spin to electron orbital angular momentum. These structures were specifically designed as samples where an incident beam of light is retroreflected. Since in the process of retroreflection the turning sense of a circularly polarized beam of light does not change and the direction of propagation is inverted, the photon spin is inverted. Due to conservation of angular momentum a transfer of photon spin to electron orbital angular momentum of conduction electrons occurs. In the structures a circular movement of electrons is blocked and therefore the transfered spin can be detected as a photovoltage due to an electromotive force which is induced by the transfer of angular momentum. Depending on the polarization of the incident beam, a maximum photovoltage of about 0,2 micro V was measured for both structures. The results are interpreted in terms of a classical electrodynamic model of the monochromatic linearly polarized photon as a propagating solitary electromagnetic wave of finite energy hf which carries an angular momentum h/2pi which is elaborated elsewhere where h is Plancks Constant and f the frequency of light. The relative values of the measured photovoltages for different polarizations can well be explained by the electrodynamic model of a photon and an associated spin angular momentum. The absolute values of the measured photovoltages are also consistent with the interpretation. The observed effects are closely related to the lateral Fedorov Imbert shift of focused beams in optics and the optical spin Hall effect and to other non linear optical effects such as the inverse faraday effect for which a new interpretation is given here in terms of the electrodynamic model of the photon and its spin.
Grosjean Thierry - One of the best experts on this subject based on the ideXlab platform.
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On the Coupling of Photon Spin to Electron Orbital Angular Momentum
2016Co-Authors: Fischer, Ulrich C., Fontein Florian, Fuchs Harald, Salut Roland, Lefier Yannick, Grosjean ThierryAbstract:Partially gold coated 90 degree glass wedges and a semi - infinite slit in a thin film of gold ending in a conducting nano-junction serve as samples to investigate the transfer of photon spin to electron orbital angular momentum. These structures were specifically designed as samples where an incident beam of light is retroreflected. Since in the process of retroreflection the turning sense of a circularly polarized beam of light does not change and the direction of propagation is inverted, the photon spin is inverted. Due to conservation of angular momentum a transfer of photon spin to electron orbital angular momentum of conduction electrons occurs. In the structures a circular movement of electrons is blocked and therefore the transfered spin can be detected as a photovoltage due to an electromotive force which is induced by the transfer of angular momentum. Depending on the polarization of the incident beam, a maximum photovoltage of about 0,2 micro V was measured for both structures. The results are interpreted in terms of a classical electrodynamic model of the monochromatic linearly polarized photon as a propagating solitary electromagnetic wave of finite energy hf which carries an angular momentum h/2pi which is elaborated elsewhere where h is Plancks Constant and f the frequency of light. The relative values of the measured photovoltages for different polarizations can well be explained by the electrodynamic model of a photon and an associated spin angular momentum. The absolute values of the measured photovoltages are also consistent with the interpretation. The observed effects are closely related to the lateral Fedorov Imbert shift of focused beams in optics and the optical spin Hall effect and to other non linear optical effects such as the inverse faraday effect for which a new interpretation is given here in terms of the electrodynamic model of the photon and its spin.Comment: 20 pages, 8 figure
Ulrich C. Fischer - One of the best experts on this subject based on the ideXlab platform.
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On the Coupling of Photon Spin to Electron Orbital Angular Momentum
arXiv: General Physics, 2016Co-Authors: Ulrich C. Fischer, Florian Fontein, Harald Fuchs, Roland Salut, Yannick Lefier, Thierry GrosjeanAbstract:Partially gold coated 90 degree glass wedges and a semi - infinite slit in a thin film of gold ending in a conducting nano-junction serve as samples to investigate the transfer of photon spin to electron orbital angular momentum. These structures were specifically designed as samples where an incident beam of light is retroreflected. Since in the process of retroreflection the turning sense of a circularly polarized beam of light does not change and the direction of propagation is inverted, the photon spin is inverted. Due to conservation of angular momentum a transfer of photon spin to electron orbital angular momentum of conduction electrons occurs. In the structures a circular movement of electrons is blocked and therefore the transfered spin can be detected as a photovoltage due to an electromotive force which is induced by the transfer of angular momentum. Depending on the polarization of the incident beam, a maximum photovoltage of about 0,2 micro V was measured for both structures. The results are interpreted in terms of a classical electrodynamic model of the monochromatic linearly polarized photon as a propagating solitary electromagnetic wave of finite energy hf which carries an angular momentum h/2pi which is elaborated elsewhere where h is Plancks Constant and f the frequency of light. The relative values of the measured photovoltages for different polarizations can well be explained by the electrodynamic model of a photon and an associated spin angular momentum. The absolute values of the measured photovoltages are also consistent with the interpretation. The observed effects are closely related to the lateral Fedorov Imbert shift of focused beams in optics and the optical spin Hall effect and to other non linear optical effects such as the inverse faraday effect for which a new interpretation is given here in terms of the electrodynamic model of the photon and its spin.