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- W1973753509 abstract "We describe a procedure for optimizing ${mathrm{Al}}_{x}{mathrm{Ga}}_{1ensuremath{-}x}mathrm{N}$-based quantum wells with respect to resonant nonlinear optical susceptibilities. It is based on the theory of isospectral transformations of the Hamiltonian, modified to include the effects of strong internal electrostatic field, characteristic for nitride heterostructures. The optimization process starts from a suitable initial Hamiltonian (potential, and a constant effective mass), and generates from it a set of realistic, parameters controlled potentials, accompanied with spatially variable effective mass. Changing the values of those parameters modifies the potential shape and, consequently, the magnitudes of dipole matrix elements relevant for the given effect, while energy levels, once obtained in the initial potential, remain intact. Designs are presented for optimal quantum wells intended for optical rectification and second-harmonic generation in the infrared spectral region." @default.
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- W1973753509 date "2004-03-12" @default.
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- W1973753509 title "Quantum well shape optimization of continuously graded<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Al</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant=normal>N</mml:mi></mml:math>…" @default.
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- W1973753509 doi "https://doi.org/10.1103/physrevb.69.115311" @default.
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