Results 31 to 40 of about 274,522 (288)

Twisted-light-induced intersubband transitions in quantum wells at normal incidence [PDF]

, 2013
We examine theoretically the intersubband transitions induced by laser beams of light with orbital angular momentum (twisted light) in semiconductor quantum wells at normal incidence. These transitions become possible in the absence of gratings thanks to
Quinteiro, G. F., Sbierski, B., Tamborenea, P. I.   +2 more
core   +2 more sources

Angular momentum loss in gravitational scattering, radiation reaction, and the Bondi gauge ambiguity

Physics Letters B, 2022
Recently, Damour computed the radiation reaction on gravitational scattering as the (linear) response to the angular momentum loss which he found to be of O(G2) in the gravitational constant.
Gabriele Veneziano, Gregory A. Vilkovisky   +1 more
doaj   +1 more source

Transferring orbital and spin angular momenta of light to atoms

, 2010
Light beams carrying orbital angular momentum, such as Laguerre-Gaussian beams, give rise to the violation of the standard dipolar selection rules during the interaction with matter yielding, in general, an exchange of angular momentum larger than hbar ...
, A Benseny, A Picón, Christov I P, Cohen-Tannoudji C, Cohen-Tannoudji C, Faisal F H M, G F Calvo, Holland P R, J Mompart, J R Vázquez de Aldana, Klimov V V Bloch D Ducloy M Rios Leite J R, L Plaja, L Roso, Lai X Y, Lai X Y   +15 more
core   +1 more source

Angular momentum of light

Journal of Modern Optics, 2005
By means of the Helmholtz theorem on the decomposition of vector fields, the angular momentum of the classical electromagnetic field is decomposed, in a general and manifestly gauge invariant manner, into a spin component and an orbital component. The method is applied to linearly and circularly polarized plane waves in their classical and quantum ...
openaire   +3 more sources

A decomposition of light’s spin angular momentum density [PDF]

Light: Science & Applications
AbstractLight carries intrinsic spin angular momentum (SAM) when the electric or magnetic field vector rotates over time. A familiar vector equation calculates the direction of light’s SAM density using the right-hand rule with reference to the electric and magnetic polarisation ellipses.
Alex J. Vernon, Sebastian Golat, Claire Rigouzzo, Eugene A. Lim, Francisco J. Rodríguez-Fortuño   +4 more
openaire   +4 more sources

Orbital Angular Momentum of Light in Optics Instruction [PDF]

Education and Training in Optics and Photonics, 2007
We present an introduction to the orbital angular momentum of light for use in optics instruction. This type of angular momentum is a new fundamental concept discovered fifteen years ago. It arises in optical beams with helical wave-fronts. We introduce it as part of a fundamental discussion of the momentum of light.
Enrique J. Galvez, Nikolay Zhelev
openaire   +2 more sources

Transverse angular momentum of photons

, 2010
We develop the quantum theory of transverse angular momentum of light beams. The theory applies to paraxial and quasi-paraxial photon beams in vacuum, and reproduces the known results for classical beams when applied to coherent states of the field. Both
A. E. Siegman, Andrea Aiello, Christoph Marquardt, Gerd Leuchs, L. Mandel   +4 more
core   +1 more source

Rotating light, OAM paradox and relativistic complex scalar field

, 2008
Recent studies show that the angular momentum, both spin and orbital, of rotating light beams possesses counter-intuitive characteristics. We present a new approach to the question of orbital angular momentum of light based on the complex massless scalar
Aitchison I J R, Alexeyev C N, Eddington A S, Jackson J D, Moller C, Nienhuis G, S C Tiwari, Simmons J W, Stokes G G, Tiwari S C, Tiwari S C, Trocheris M G   +11 more
core   +1 more source

Light-Front Holography: A First Approximation to QCD [PDF]

, 2008
Starting from the Hamiltonian equation of motion in QCD, we identify an invariant light-front coordinate $\zeta$ which allows the separation of the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular ...
Guy F. de Téramond, J. M. Maldacena, L. D. Landau, Stanley J. Brodsky   +3 more
core   +2 more sources

Mixing the Light Spin with Plasmon Orbit by Nonlinear Light-Matter Interaction in Gold

Physical Review X, 2019
Transformation of light carrying spin angular momentum (SAM) to optical field vortices carrying orbital angular momentum (OAM) has been of wide interest in recent years.
G. Spektor, D. Kilbane, A. K. Mahro, M. Hartelt, E. Prinz, M. Aeschlimann, M. Orenstein   +6 more
doaj   +1 more source