Interference through the resonant Auger process via multiple core-excited states

AbstractIn a radiative Auger process, optical decay leaves other carriers in excited states, resulting in weak red-shifted satellite peaks in the emission spectrum. The appearance of radiative Auger in the emission directly leads to the question if the process can be inverted: simultaneous photon absorption and electronic demotion. However, excitation of the radiative Auger transition has not been shown, neither on atoms nor on solid-state quantum emitters. Here, we demonstrate the optical driving of the radiative Auger transition, linking few-body Coulomb interactions and quantum optics. We perform our experiments on a trion in a semiconductor quantum dot, where the radiative Auger and the fundamental transition form a Λ-system. On driving both transitions simultaneously, we observe a reduction of the fluorescence signal by up to 70%. Our results suggest the possibility of turning resonance fluorescence on and off using radiative Auger as well as THz spectroscopy with optics close to the visible regime.

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Energies of Excited States of Doubly Ionized Molecules by Means of Auger Electron Spectroscopy Part I. Electronic States of N22+

Zeitschrift für Naturforschung A ◽

10.1515/zna-1969-1108 ◽

1969 ◽

Vol 24 (11) ◽

pp. 1728-1733 ◽

Cited By ~ 87

Author(s):

D. Stalherm ◽

B. Cleff ◽

H. Hillig ◽

W. Mehlhorn

Keyword(s):

Auger Electron Spectroscopy ◽

Excited States ◽

Electron Spectroscopy ◽

Auger Electron ◽

Direct Evidence ◽

Auger Spectrum ◽

Electronic States ◽

Auger Process ◽

Auger Electrons ◽

Cylindrical Mirror

Abstract A new method, Auger electron spectroscopy, is applied to the study of excited states of doubly ionized molecules. The energies of Auger electrons determine directly the vertical energies of doubly ionized states, because the single Auger process leaves the molecule in a state of double ionization. We have investigated the states of N22+ via the K Auger spectrum of N2. The ionization in the K shell was caused by electron impact. The K Auger electrons, analyzed by means of an electrostatic cylindrical mirror analyzer, gave direct evidence for the following states: x1Σg+, A″ 3Σu+ ,A3 Πg, c1Πg, d1Σu+ and e1Σg+ .Their energies have been measured and are listed below. Also the energy required to ionize N2 twofold in the (σg 2s) orbital has been determined to be (96.5 ± 1.0) eV.

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Magic Numbers in Boson 4He Clusters: The Auger Evaporation Mechanism

Molecules ◽

10.3390/molecules26206244 ◽

2021 ◽

Vol 26 (20) ◽

pp. 6244

Author(s):

Elena Spreafico ◽

Giorgio Benedek ◽

Oleg Kornilov ◽

Jan Peter Toennies

Keyword(s):

Excited States ◽

Alternative Explanation ◽

Theoretical Study ◽

Matter Wave ◽

Particle Model ◽

Magic Numbers ◽

Auger Process ◽

Independent Particle ◽

Independent Particle Model ◽

Specific Cluster

The absence of magic numbers in bosonic 4He clusters predicted by all theories since 1984 has been challenged by high-resolution matter-wave diffraction experiments. The observed magic numbers were explained in terms of enhanced growth rates of specific cluster sizes for which an additional excitation level calculated by diffusion Monte Carlo is stabilized. The present theoretical study provides an alternative explanation based on a simple independent particle model of the He clusters. Collisions between cluster atoms in excited states within the cluster lead to selective evaporation via an Auger process. The calculated magic numbers as well as the shape of the number distributions are in quite reasonable agreement with the experiments.

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Effects of intense chirped x-ray laser on resonant Auger process through multiple core-excited states

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/1361-6455/ab81e6 ◽

2020 ◽

Vol 53 (14) ◽

pp. 145601

Author(s):

Souvik Chatterjee

Keyword(s):

Excited States ◽

Auger Process ◽

X Ray

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Excited States of Bound Excitons and Neutral Donors in CdS

Canadian Journal of Physics ◽

10.1139/p71-292 ◽

1971 ◽

Vol 49 (19) ◽

pp. 2432-2439 ◽

Cited By ~ 35

Author(s):

H. Malm ◽

R. R. Haering

Keyword(s):

Binding Energy ◽

Excited States ◽

Complex I ◽

Radiative Decay ◽

Energy Levels ◽

Auger Process ◽

Neutral Donor ◽

New Information ◽

Donor Binding Energy ◽

Low Temperature Photoluminescence

A technique employing a monochromator to select the incident photon energy and a spectrometer to analyze the low temperature photoluminescence of CdS crystals has proven to be valuable, both in analyzing the usual photoluminescent spectra and in obtaining new information on excited states of bound excitons and excited states of neutral donors in the crystal. An accurate measurement of the donor energy levels and the donor binding energy gave a binding energy for the Cl donor in CdS of 33.0 ± 0.2 meV. Energies of excited states of the bound exciton complexes were also measured and for the bound exciton – neutral donor complex (I2 complex) some seven excited state levels were found. One type of radiative decay observed for this I2 complex is a radiative Auger process. This has important consequences in interpreting photoconductivity spectra.

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Vuv Spectra Y to Mo

International Astronomical Union Colloquium ◽

10.1017/s0252921100107808 ◽

1988 ◽

Vol 102 ◽

pp. 239

Author(s):

M.S.Z. Chaghtai

Keyword(s):

Excited States ◽

Spectral Analyses ◽

Vuv Spectra

Using R.D. Cowan’s computations (1979) and parametric calculations of Meinders et al (1982), old analyses are thoroughly revised and extended at Aligarh, of Zr III by Khan et al (1981), of Nb IV by Shujauddin et Chaghtai (1985), of Mo V by Tauheed at al (1985). Cabeza et al (1986) confirmed the last one largely.Extensive studies have been reported of the 1–e spectra, Zr IV (Rahimullah et al 1980; Acquista and Reader 1980), Nb V (Shujauddin et al 1982; Kagan et al 1981) and Mo VI (Edlén et al 1985). Some interacting 4p54d2levels of these spectra have been reported from our laboratory, also.Detailed spectral analyses of transitions between excited states have furnished complete energy values for J ≠ 1 levels of these spectra during 1970s and 80s. Shujauddin et al (1982) have worked out Nb VI and Tauheed et al (1984) Mo VII from our lab, while Khan et al (1981) share the work on Zr V with Reader and Acquista (1979).

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