Nonresonant quadrupolar second-harmonic generation in isotropic solids by use of two orthogonally polarized laser beams.
We demonstrate an experimental technique for isolating and enhancing quadrupolar second-harmonic generation in isotropic materials by using two orthogonally polarized laser beams that create wavelength-scale, forward-radiating gradients in the second-harmonic polarization.
Sun
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FOCUS Center, Department of Physics, University of Texas at Austin Austin, Texas 78712-1081, USA. sunlf@physics.utexas.edu
Figliozzi
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An
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Downer
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Mochan
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Mendoza
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