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Title: Optical spectroscopy of molecular junctions: Nonequilibrium Green’s functions perspective

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4948469· OSTI ID:1471063

We consider optical spectroscopy of molecular junctions from the quantum transport perspective when radiation field is quantized and optical response of the system is simulated as photon flux. Using exact expressions for photon and electronic fluxes derived within the nonequilibrium Green function (NEGF) methodology and utilizing fourth order diagrammatic perturbation theory (PT) in molecular coupling to radiation field, we perform simulations employing realistic parameters. Results of the simulations are compared to the bare PT which is usually employed in studies on nonlinear optical spectroscopy to classify optical processes. Lastly, we show that the bare PT violates conservation laws, while flux conserving NEGF formulation mixes optical processes.

Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0006422
OSTI ID:
1471063
Alternate ID(s):
OSTI ID: 1251517
Journal Information:
Journal of Chemical Physics, Vol. 144, Issue 17; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (6)

Nonequilibrium diagrammatic technique for Hubbard Green functions journal March 2017
On simulation of local fluxes in molecular junctions journal May 2018
Simulation of optical response functions in molecular junctions journal June 2016
Simulation of optical response functions in molecular junctions text January 2016
Photonics and Spectroscopy in Nanojunctions: A Theoretical Insight text January 2018
Flux-Conserving Diagrammatic Formulation of Optical Spectroscopy of Open Quantum Systems journal October 2019

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