TY - JOUR
T1 - Azimuthal and radial shaping of vortex beams generated in twisted nonlinear photonic crystals
AU - Shemer, Keren
AU - Voloch-Bloch, Noa
AU - Shapira, Asia
AU - Libster, Ana
AU - Juwiler, Irit
AU - Arie, Ady
PY - 2013/12/15
Y1 - 2013/12/15
N2 - We experimentally demonstrate that the orbital angular momentum (OAM) of a second harmonic (SH) beam, generated within twisted nonlinear photonic crystals, depends both on the OAM of the input pump beam and on the quasi-angular momentum of the crystal. In addition, when the pump's radial index is zero, the radial index of the SH beam is equal to that of the nonlinear crystal. Furthermore, by mixing two noncollinear pump beams in this crystal, we generate, in addition to the SH beams, a new "virtual beam" having multiple values of OAM that are determined by the nonlinear process.
AB - We experimentally demonstrate that the orbital angular momentum (OAM) of a second harmonic (SH) beam, generated within twisted nonlinear photonic crystals, depends both on the OAM of the input pump beam and on the quasi-angular momentum of the crystal. In addition, when the pump's radial index is zero, the radial index of the SH beam is equal to that of the nonlinear crystal. Furthermore, by mixing two noncollinear pump beams in this crystal, we generate, in addition to the SH beams, a new "virtual beam" having multiple values of OAM that are determined by the nonlinear process.
UR - http://www.scopus.com/inward/record.url?scp=84890542606&partnerID=8YFLogxK
U2 - 10.1364/OL.38.005470
DO - 10.1364/OL.38.005470
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AN - SCOPUS:84890542606
SN - 0146-9592
VL - 38
SP - 5470
EP - 5473
JO - Optics Letters
JF - Optics Letters
IS - 24
ER -