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25 April 2024 |
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Article overview
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Level shift and decay dynamics of a quantum emitter around plasmonic nanostructure | | Meng Tian
; Yong-Gang Huang
; Sha-Sha Wen
; Xiao-Yun Wang
; Hong Yang
; Jin-Zhang Peng
; He-Ping Zhao
; | | Date: |
18 Feb 2019 | | Abstract: | We put forward a general approach for calculating the quantum energy level
shift for emitter in arbitrary nanostructures, in which the energy level shift
is expressed by the sum of the real part of the scattering photon Green
function (GF) and a simple integral about the imaginary part of the photon GF
in the real frequency range without principle value. Compared with the method
of direct principal value integral over the positive frequency axis and the
method by transferring into the imaginary axis, this method avoids the
principle value integral and the calculation of the scattering GF with
imaginary frequency. In addition, a much narrower frequency range about the
scattering photon GF in enough to get a convergent result. It is numerically
demonstrated in the case for a quantum emitter (QE) located around a nanosphere
and in a gap plasmonic nanocavity. Quantum dynamics of the emitter is
calculated by the time domain method through solving Schr"{o}dinger equation
in the form of Volterra integral of the second kind and by the frequency domain
method based on the Green’s function expression for the evolution operator. It
is found that the frequency domain method needs information of the scattering
GF over a much narrower frequency range. In addition, reversible dynamics is
observed. These findings are instructive in the fields of coherent light-matter
interactions. | | Source: | arXiv, 1902.6387 | | Services: | Forum | Review | PDF | Favorites | |
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