In this paper we present a time-domain time-dependent density functional theory (TDDFT) approach to calculate frequency-dependent polarizability and hyperpolarizabilities. In this approach, the electronic degrees of freedom are propagated within the density matrix based TDDFT framework using the efficient modified midpoint and unitary transformation algorithm. We use monochromatic waves as external perturbations and apply the finite field method to extract various orders of the time-dependent dipole moment. By fitting each order of time-dependent dipole to sinusoidal waves with harmonic frequencies, one can obtain the corresponding (hyper)polarizability tensors. This approach avoids explicit Fourier transform and therefore does not require long simulation time. The method is illustrated with application to the optically active organic molecule para-nitroaniline, of which the frequency-dependent polarizability α(−ω; ω), second-harmonic generation β(−2ω; ω, ω), optical rectification β(0; −ω, ω), third-harmonic generation γ(−3ω; ω, ω, ω), and degenerate four-wave mixing γ(−ω; ω, ω, −ω) are calculated.
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14 February 2013
Research Article|
February 13 2013
An efficient method for calculating dynamical hyperpolarizabilities using real-time time-dependent density functional theory
Feizhi Ding;
Feizhi Ding
Department of Chemistry,
University of Washington
, Seattle, Washington 98195, USA
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Benjamin E. Van Kuiken;
Benjamin E. Van Kuiken
Department of Chemistry,
University of Washington
, Seattle, Washington 98195, USA
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Bruce E. Eichinger;
Bruce E. Eichinger
Department of Chemistry,
University of Washington
, Seattle, Washington 98195, USA
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Xiaosong Li
Xiaosong Li
a)
Department of Chemistry,
University of Washington
, Seattle, Washington 98195, USA
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a)
Author to whom correspondence should be addressed. Electronic mail: li@chem.washington.edu.
J. Chem. Phys. 138, 064104 (2013)
Article history
Received:
November 02 2012
Accepted:
January 21 2013
Citation
Feizhi Ding, Benjamin E. Van Kuiken, Bruce E. Eichinger, Xiaosong Li; An efficient method for calculating dynamical hyperpolarizabilities using real-time time-dependent density functional theory. J. Chem. Phys. 14 February 2013; 138 (6): 064104. https://doi.org/10.1063/1.4790583
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