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Title: Second-harmonic generation excited by a rotating Laguerre-Gaussian beam

Experimental data demonstrate that unlike linear optical processes, an optical Laguerre-Gaussian beam of frequency {omega}, with topological charge m, rotating with angular frequency {Omega}<<{omega}, may not be considered as a monochromatic beam with the shifted frequency {omega}+m{Omega} (Doppler angular shift) for the second-harmonic generation nonlinear process.
Authors:
 [1]
  1. ICFO - Institut de Ciencies Fotoniques, Mediterranean Technology Park, ES-08860, Castelldefels (Barcelona), Spain and ICREA - Institucio Catalana de Recerca i Estudis Avancats, ES-08010, Barcelona (Spain)
Publication Date:
OSTI Identifier:
21454801
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 82; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.82.035801; (c) 2010 The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; DOPPLER EFFECT; EXCITATION; HARMONIC GENERATION; MONOCHROMATIC RADIATION; NONLINEAR PROBLEMS; PHOTON BEAMS; TOPOLOGY BEAMS; ELECTROMAGNETIC RADIATION; ENERGY-LEVEL TRANSITIONS; FREQUENCY MIXING; MATHEMATICS; RADIATIONS