Photoexcitation of graphene with twisted light

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We study theoretically the interaction of twisted light with graphene. The light-matter interaction matrix elements between the tight-binding states of electrons in graphene are determined near the Dirac points. We examine the dynamics of the photoexcitation process by posing the equations of motion...

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Detalles Bibliográficos
Autor principal: Farías, María Belén
Otros Autores: Quinteiro, G.F, Tamboreneaa, P.I
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2013
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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100 1 |a Farías, María Belén 
245 1 0 |a Photoexcitation of graphene with twisted light 
260 |c 2013 
270 1 0 |m Departamento de Física e IFIBA, Universidad de Buenos Aires, Ciudad Universitaria, Pab. I, C1428EHA Buenos Aires, Argentina 
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506 |2 openaire  |e Política editorial 
520 3 |a We study theoretically the interaction of twisted light with graphene. The light-matter interaction matrix elements between the tight-binding states of electrons in graphene are determined near the Dirac points. We examine the dynamics of the photoexcitation process by posing the equations of motion of the density matrix and working up to second order in the field. The time evolution of the angular momentum of the photoexcited electrons and their associated photocurrents are examined in order to elucidate the mechanisms of angular momentum transfer. We find that the transfer of spin and orbital angular momentum from light to the electrons is more akin here to the case of intraband than of interband transitions in semiconductors, due to the fact that the two relevant energy bands of graphene originate from the same atomic orbitals.© EDP Sciences Società Italiana di Fisica Springer-Verlag 2013.  |l eng 
593 |a Departamento de Física e IFIBA, Universidad de Buenos Aires, Ciudad Universitaria, Pab. I, C1428EHA Buenos Aires, Argentina 
690 1 0 |a ATOMIC ORBITAL 
690 1 0 |a DENSITY MATRIX 
690 1 0 |a INTER-BAND TRANSITION 
690 1 0 |a LIGHT-MATTER INTERACTIONS 
690 1 0 |a ORBITAL ANGULAR MOMENTUM 
690 1 0 |a PHOTO-EXCITATION PROCESS 
690 1 0 |a PHOTOEXCITED ELECTRONS 
690 1 0 |a TIME EVOLUTIONS 
690 1 0 |a ANGULAR MOMENTUM 
690 1 0 |a EQUATIONS OF MOTION 
690 1 0 |a ORBITAL TRANSFER 
690 1 0 |a PHOTOEXCITATION 
690 1 0 |a QUANTUM CHEMISTRY 
690 1 0 |a GRAPHENE 
700 1 |a Quinteiro, G.F. 
700 1 |a Tamboreneaa, P.I. 
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