Identification and treatment of an efficiency anomaly in a symmetrically ruled grating illuminated at normal incidence

Frédéric E. Vincent, Walter M Harris, Matthew Beasley, Jason Corliss, Yan Bétrémieux, Lotfi Ben Jaffel, Fred L. Roesler

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report the efficiency characteristics of a symmetrically ruled grating in the ± first order with a MgF2 coating that has been optimized for use at 121.6 nm. The grating is used as a beam splitter and dispersing element in an all-reflective spatial heterodyne spectrometer and therefore must be illuminated at normal incidence. A vector analysis of the performance of the grating indicated that acceptable efficiency of 25% would be achieved in this configuration, a result that was initially confirmed in testing at 7° from normal. However, subsequent testing at normal incidence revealed a sharply peaked anomaly that reduced the efficiency by a factor of 2. This anomaly disappeared after the deposit of a second MgF2 coating, although this was accompanied by an overall reduction in efficiency. A second, identical grating was obtained and coated with the second MgF2 recipe. Measurements of this grating show no anomaly at normal incidence and the predicted efficiency at other angles. Here we discuss the characteristics of the anomaly, our steps to address them, and the implications of our findings.

Original languageEnglish (US)
Pages (from-to)346-349
Number of pages4
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume184
Issue number3-6
DOIs
StatePublished - Apr 2011
Externally publishedYes

Fingerprint

incidence
gratings
anomalies
vector analysis
coatings
Coatings
dispersing
Testing
beam splitters
Spectrometers
Deposits
deposits
spectrometers
configurations

Keywords

  • Diffraction gratings
  • Efficiency anomalies
  • Spectroscopy
  • VUV

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Radiation

Cite this

Identification and treatment of an efficiency anomaly in a symmetrically ruled grating illuminated at normal incidence. / Vincent, Frédéric E.; Harris, Walter M; Beasley, Matthew; Corliss, Jason; Bétrémieux, Yan; Jaffel, Lotfi Ben; Roesler, Fred L.

In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 184, No. 3-6, 04.2011, p. 346-349.

Research output: Contribution to journalArticle

Vincent, Frédéric E. ; Harris, Walter M ; Beasley, Matthew ; Corliss, Jason ; Bétrémieux, Yan ; Jaffel, Lotfi Ben ; Roesler, Fred L. / Identification and treatment of an efficiency anomaly in a symmetrically ruled grating illuminated at normal incidence. In: Journal of Electron Spectroscopy and Related Phenomena. 2011 ; Vol. 184, No. 3-6. pp. 346-349.
@article{4ec48ca490f146a8908ff71c6eb6b6c7,
title = "Identification and treatment of an efficiency anomaly in a symmetrically ruled grating illuminated at normal incidence",
abstract = "We report the efficiency characteristics of a symmetrically ruled grating in the ± first order with a MgF2 coating that has been optimized for use at 121.6 nm. The grating is used as a beam splitter and dispersing element in an all-reflective spatial heterodyne spectrometer and therefore must be illuminated at normal incidence. A vector analysis of the performance of the grating indicated that acceptable efficiency of 25{\%} would be achieved in this configuration, a result that was initially confirmed in testing at 7° from normal. However, subsequent testing at normal incidence revealed a sharply peaked anomaly that reduced the efficiency by a factor of 2. This anomaly disappeared after the deposit of a second MgF2 coating, although this was accompanied by an overall reduction in efficiency. A second, identical grating was obtained and coated with the second MgF2 recipe. Measurements of this grating show no anomaly at normal incidence and the predicted efficiency at other angles. Here we discuss the characteristics of the anomaly, our steps to address them, and the implications of our findings.",
keywords = "Diffraction gratings, Efficiency anomalies, Spectroscopy, VUV",
author = "Vincent, {Fr{\'e}d{\'e}ric E.} and Harris, {Walter M} and Matthew Beasley and Jason Corliss and Yan B{\'e}tr{\'e}mieux and Jaffel, {Lotfi Ben} and Roesler, {Fred L.}",
year = "2011",
month = "4",
doi = "10.1016/j.elspec.2010.12.033",
language = "English (US)",
volume = "184",
pages = "346--349",
journal = "Journal of Electron Spectroscopy and Related Phenomena",
issn = "0368-2048",
publisher = "Elsevier",
number = "3-6",

}

TY - JOUR

T1 - Identification and treatment of an efficiency anomaly in a symmetrically ruled grating illuminated at normal incidence

AU - Vincent, Frédéric E.

AU - Harris, Walter M

AU - Beasley, Matthew

AU - Corliss, Jason

AU - Bétrémieux, Yan

AU - Jaffel, Lotfi Ben

AU - Roesler, Fred L.

PY - 2011/4

Y1 - 2011/4

N2 - We report the efficiency characteristics of a symmetrically ruled grating in the ± first order with a MgF2 coating that has been optimized for use at 121.6 nm. The grating is used as a beam splitter and dispersing element in an all-reflective spatial heterodyne spectrometer and therefore must be illuminated at normal incidence. A vector analysis of the performance of the grating indicated that acceptable efficiency of 25% would be achieved in this configuration, a result that was initially confirmed in testing at 7° from normal. However, subsequent testing at normal incidence revealed a sharply peaked anomaly that reduced the efficiency by a factor of 2. This anomaly disappeared after the deposit of a second MgF2 coating, although this was accompanied by an overall reduction in efficiency. A second, identical grating was obtained and coated with the second MgF2 recipe. Measurements of this grating show no anomaly at normal incidence and the predicted efficiency at other angles. Here we discuss the characteristics of the anomaly, our steps to address them, and the implications of our findings.

AB - We report the efficiency characteristics of a symmetrically ruled grating in the ± first order with a MgF2 coating that has been optimized for use at 121.6 nm. The grating is used as a beam splitter and dispersing element in an all-reflective spatial heterodyne spectrometer and therefore must be illuminated at normal incidence. A vector analysis of the performance of the grating indicated that acceptable efficiency of 25% would be achieved in this configuration, a result that was initially confirmed in testing at 7° from normal. However, subsequent testing at normal incidence revealed a sharply peaked anomaly that reduced the efficiency by a factor of 2. This anomaly disappeared after the deposit of a second MgF2 coating, although this was accompanied by an overall reduction in efficiency. A second, identical grating was obtained and coated with the second MgF2 recipe. Measurements of this grating show no anomaly at normal incidence and the predicted efficiency at other angles. Here we discuss the characteristics of the anomaly, our steps to address them, and the implications of our findings.

KW - Diffraction gratings

KW - Efficiency anomalies

KW - Spectroscopy

KW - VUV

UR - http://www.scopus.com/inward/record.url?scp=79957625671&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79957625671&partnerID=8YFLogxK

U2 - 10.1016/j.elspec.2010.12.033

DO - 10.1016/j.elspec.2010.12.033

M3 - Article

AN - SCOPUS:79957625671

VL - 184

SP - 346

EP - 349

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

SN - 0368-2048

IS - 3-6

ER -