Type I and type II second harmonic generation of conically refracted beams

Type I and type II second harmonic generation (SHG) of a beam transformed by the conical refraction phenomenon are presented. We show that, for type I, the second harmonic intensity pattern is a light ring with a point of null intensity while, for type II, the light ring possesses two dark regions....

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Bibliographic Details
Published in:Optics letters 2013-07, Vol.38 (14), p.2484-2486
Main Authors: Turpin, Alex, Loiko, Yurii V, Kalkandjiev, Todor K, Trull, Jose, Cojocaru, Crina, Mompart, Jordi
Format: Article
Language:English
Subjects:
Beams (radiation)
Evolution
Exact solutions
Fotons
Física
Harmonic generation
Harmonics
Harmònics (Ones elèctriques)
Land
Mathematical analysis
Nonlinear optics
Photons
Refraction
Second harmonic generation
Two photon processes
Àrees temàtiques de la UPC
Òptica no lineal
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Summary:Type I and type II second harmonic generation (SHG) of a beam transformed by the conical refraction phenomenon are presented. We show that, for type I, the second harmonic intensity pattern is a light ring with a point of null intensity while, for type II, the light ring possesses two dark regions. Taking into account the different two-photon processes involved in SHG, we have derived analytical expressions for the resulting transverse intensity patterns that are in good agreement with the experimental data. Finally, we have investigated the spatial evolution of the second harmonic signals, showing that they behave as conically refracted beams.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.38.002484