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Title: Spectral restoration in high resolution electron energy loss spectroscopy based on iterative semi-blind Lucy-Richardson algorithm applied to rutile surfaces

Abstract

A new spectral restoration algorithm of reflection electron energy loss spectra is proposed. It is based on the maximum likelihood principle as implemented in the iterative Lucy-Richardson approach. Resolution is enhanced and point spread function recovered in a semi-blind way by forcing cyclically the zero loss to converge towards a Dirac peak. Synthetic phonon spectra of TiO{sub 2} are used as a test bed to discuss resolution enhancement, convergence benefit, stability towards noise, and apparatus function recovery. Attention is focused on the interplay between spectral restoration and quasi-elastic broadening due to free carriers. A resolution enhancement by a factor up to 6 on the elastic peak width can be obtained on experimental spectra of TiO{sub 2}(110) and helps revealing mixed phonon/plasmon excitations.

Authors:
; ;  [1];  [2]
  1. CNRS, UMR 7588, Institut des NanoSciences de Paris, 75005 Paris (France)
  2. (France)
Publication Date:
OSTI Identifier:
22392322
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALGORITHMS; ELECTRONS; ENERGY-LOSS SPECTROSCOPY; ITERATIVE METHODS; MAXIMUM-LIKELIHOOD FIT; RESOLUTION; RUTILE; SPECTRA; SURFACES; TITANIUM OXIDES

Citation Formats

Lazzari, Rémi, E-mail: remi.lazzari@insp.jussieu.fr, Li, Jingfeng, E-mail: jingfeng.li@insp.jussieu.fr, Jupille, Jacques, E-mail: jacques.jupille@insp.jussieu.fr, and Sorbonne Universités, UPMC Univ Paris 06, UMR 7588, Institut des NanoSciences de Paris, 75005 Paris. Spectral restoration in high resolution electron energy loss spectroscopy based on iterative semi-blind Lucy-Richardson algorithm applied to rutile surfaces. United States: N. p., 2015. Web. doi:10.1063/1.4905433.
Lazzari, Rémi, E-mail: remi.lazzari@insp.jussieu.fr, Li, Jingfeng, E-mail: jingfeng.li@insp.jussieu.fr, Jupille, Jacques, E-mail: jacques.jupille@insp.jussieu.fr, & Sorbonne Universités, UPMC Univ Paris 06, UMR 7588, Institut des NanoSciences de Paris, 75005 Paris. Spectral restoration in high resolution electron energy loss spectroscopy based on iterative semi-blind Lucy-Richardson algorithm applied to rutile surfaces. United States. doi:10.1063/1.4905433.
Lazzari, Rémi, E-mail: remi.lazzari@insp.jussieu.fr, Li, Jingfeng, E-mail: jingfeng.li@insp.jussieu.fr, Jupille, Jacques, E-mail: jacques.jupille@insp.jussieu.fr, and Sorbonne Universités, UPMC Univ Paris 06, UMR 7588, Institut des NanoSciences de Paris, 75005 Paris. Thu . "Spectral restoration in high resolution electron energy loss spectroscopy based on iterative semi-blind Lucy-Richardson algorithm applied to rutile surfaces". United States. doi:10.1063/1.4905433.
@article{osti_22392322,
title = {Spectral restoration in high resolution electron energy loss spectroscopy based on iterative semi-blind Lucy-Richardson algorithm applied to rutile surfaces},
author = {Lazzari, Rémi, E-mail: remi.lazzari@insp.jussieu.fr and Li, Jingfeng, E-mail: jingfeng.li@insp.jussieu.fr and Jupille, Jacques, E-mail: jacques.jupille@insp.jussieu.fr and Sorbonne Universités, UPMC Univ Paris 06, UMR 7588, Institut des NanoSciences de Paris, 75005 Paris},
abstractNote = {A new spectral restoration algorithm of reflection electron energy loss spectra is proposed. It is based on the maximum likelihood principle as implemented in the iterative Lucy-Richardson approach. Resolution is enhanced and point spread function recovered in a semi-blind way by forcing cyclically the zero loss to converge towards a Dirac peak. Synthetic phonon spectra of TiO{sub 2} are used as a test bed to discuss resolution enhancement, convergence benefit, stability towards noise, and apparatus function recovery. Attention is focused on the interplay between spectral restoration and quasi-elastic broadening due to free carriers. A resolution enhancement by a factor up to 6 on the elastic peak width can be obtained on experimental spectra of TiO{sub 2}(110) and helps revealing mixed phonon/plasmon excitations.},
doi = {10.1063/1.4905433},
journal = {Review of Scientific Instruments},
number = 1,
volume = 86,
place = {United States},
year = {Thu Jan 15 00:00:00 EST 2015},
month = {Thu Jan 15 00:00:00 EST 2015}
}