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http://hdl.handle.net/10071/12887
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Title: High orbital angular momentum harmonic generation
Authors: Vieira, J.
Trines, R. M. G.
Alves, E. P.
Fonseca, R. A.
Mendonça, J. T.
Bingham, R.
Norreys, P.
Silva, L. O.
Issue Date: 2016
Publisher: American Physical Society
Abstract: We identify and explore a high orbital angular momentum (OAM) harmonics generation and amplification mechanism that manipulates the OAM independently of any other laser property, by preserving the initial laser wavelength, through stimulated Raman backscattering in a plasma. The high OAM harmonics spectra can extend at least up to the limiting value imposed by the paraxial approximation. We show with theory and particle-in-cell simulations that the orders of the OAM harmonics can be tuned according to a selection rule that depends on the initial OAM of the interacting waves. We illustrate the high OAM harmonics generation in a plasma using several examples including the generation of prime OAM harmonics. The process can also be realized in any nonlinear optical Kerr media supporting three-wave interactions.
Peer reviewed: yes
URI: http://hdl.handle.net/10071/12887
DOI: 10.1103/PhysRevLett.117.265001
ISSN: 0031-9007
Ciência-IUL: https://ciencia.iscte-iul.pt/id/ci-pub-31241
Accession number: WOS:000390301100005
Appears in Collections:CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica

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