Time-Dependent Coupled Perturbed Hartree–Fock and Density-Functional-Theory Approach for Calculating Frequency-Dependent (Hyper)Polarizabilities with Nonorthogonal Localized Molecular Orbitals

Electron rescattering has been well studied and simulated for cases with ponderomotive energies of the quasi-free electrons, derived from laser–gas and laser–surface interactions, lower than 50 eV. However, with advents in longer wavelengths and laser field enhancement metallic surfaces, previous simulations no longer suffice to describe more recent strong field and high yield experiments. We present a brief introduction to and some of the theoretical and empirical background of electron rescattering emissions from a metal. We set upon using the Jellium potential with a shielded atomic surface potential to model the metal. We then explore how the electron energy spectra are obtained in the quantum simulation, which is performed using a custom computationally intensive time-dependent Schrödinger equation solver via the Crank–Nicolson method. Finally, we discuss the results of the simulation and examine the effects of the incident laser’s wavelength, peak electric field strength, and field penetration on electron spectra and yields. Future simulations will investigate a more accurate density functional theory metallic model with a system of several non-interacting electrons. Eventually, we will move to a full time-dependent density functional theory approach.

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Energy Decomposition Analysis for Excimers Using Absolutely Localized Molecular Orbitals within Time-Dependent Density Functional Theory and Configuration Interaction with Single Excitations

Journal of Chemical Theory and Computation ◽

10.1021/acs.jctc.8b00537 ◽

2018 ◽

Vol 14 (10) ◽

pp. 5156-5168 ◽

Cited By ~ 5

Author(s):

Qinghui Ge ◽

Martin Head-Gordon

Keyword(s):

Density Functional Theory ◽

Configuration Interaction ◽

Density Functional ◽

Decomposition Analysis ◽

Time Dependent ◽

Energy Decomposition Analysis ◽

Energy Decomposition ◽

Functional Theory ◽

Localized Molecular Orbitals ◽

Dependent Density

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Vibrational spectra of alkylamino substituted phthalocyanine compounds: Density functional theory calculations

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424618500591 ◽

2018 ◽

Vol 22 (09n10) ◽

pp. 771-776 ◽

Cited By ~ 2

Author(s):

Xin Chen ◽

Chiming Wang ◽

Yuxiang Chen ◽

Dongdong Qi ◽

Jianzhuang Jiang

Keyword(s):

Density Functional Theory ◽

Infrared Spectra ◽

Vibrational Spectra ◽

Bond Order ◽

Density Functional ◽

Density Functional Theory Calculations ◽

Molecular Orbitals ◽

Functional Theory ◽

Localized Molecular Orbitals ◽

Theoretical Investigations

The infrared spectra of tetrakis(dibutylamino) phthalocyanine and octakis(dibutylamino) compounds were studied via theoretical investigations. The results reveal deep fusion of the peripheral alkylamino moieties with the phthalocyanine chromophore in the tetrakis(dibutylamino)- but not in the octakis(dibutylamino)-phthalocyanine compounds. The successive localized molecular orbitals (LMO) and bond order analyses give support for the infrared vibrational results.

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