Temperature dependence of the generation and decay of E' centers induced in silica by 4.7 eV laser radiation

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Abstract

We report a study of the generation of silicon dangling bonds (E' centers) induced in fused silica by 4.7 eV laser irradiation in the 10 < T < 475 K temperature range, carried out by in situ optical absorption spectroscopy. The generation of the defects. occurring by transformation of pre-existing precursors, results to be a thermally activated process, quenched below 150 K and with a 0.044 eV activation energy. At T > 200 K the induced defects undergo a post-irradiation decay due to their reaction with mobile H(2). The interplay between generation and annealing gives rise to a bell-shaped temperature dependence of the concentration of induced E' centers, peaking at 250 K
Lingua originaleEnglish
pagine (da-a)1038-1041
Numero di pagine4
RivistaJournal of Non-Crystalline Solids
Volume355
Stato di pubblicazionePublished - 2009

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Laser radiation
Silicon Dioxide
Silica
laser beams
silicon dioxide
Defects
temperature dependence
Dangling bonds
decay
Silicon
Laser beam effects
Fused silica
Absorption spectroscopy
Light absorption
irradiation
Activation energy
defects
Irradiation
Annealing
bells

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Condensed Matter Physics
  • Ceramics and Composites

Cita questo

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title = "Temperature dependence of the generation and decay of E' centers induced in silica by 4.7 eV laser radiation",
abstract = "We report a study of the generation of silicon dangling bonds (E' centers) induced in fused silica by 4.7 eV laser irradiation in the 10 < T < 475 K temperature range, carried out by in situ optical absorption spectroscopy. The generation of the defects. occurring by transformation of pre-existing precursors, results to be a thermally activated process, quenched below 150 K and with a 0.044 eV activation energy. At T > 200 K the induced defects undergo a post-irradiation decay due to their reaction with mobile H(2). The interplay between generation and annealing gives rise to a bell-shaped temperature dependence of the concentration of induced E' centers, peaking at 250 K",
keywords = "Silica, laser effects, annealing",
author = "Marco Cannas and Fabrizio Messina",
year = "2009",
language = "English",
volume = "355",
pages = "1038--1041",
journal = "Journal of Non-Crystalline Solids",
issn = "0022-3093",
publisher = "Elsevier",

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TY - JOUR

T1 - Temperature dependence of the generation and decay of E' centers induced in silica by 4.7 eV laser radiation

AU - Cannas, Marco

AU - Messina, Fabrizio

PY - 2009

Y1 - 2009

N2 - We report a study of the generation of silicon dangling bonds (E' centers) induced in fused silica by 4.7 eV laser irradiation in the 10 < T < 475 K temperature range, carried out by in situ optical absorption spectroscopy. The generation of the defects. occurring by transformation of pre-existing precursors, results to be a thermally activated process, quenched below 150 K and with a 0.044 eV activation energy. At T > 200 K the induced defects undergo a post-irradiation decay due to their reaction with mobile H(2). The interplay between generation and annealing gives rise to a bell-shaped temperature dependence of the concentration of induced E' centers, peaking at 250 K

AB - We report a study of the generation of silicon dangling bonds (E' centers) induced in fused silica by 4.7 eV laser irradiation in the 10 < T < 475 K temperature range, carried out by in situ optical absorption spectroscopy. The generation of the defects. occurring by transformation of pre-existing precursors, results to be a thermally activated process, quenched below 150 K and with a 0.044 eV activation energy. At T > 200 K the induced defects undergo a post-irradiation decay due to their reaction with mobile H(2). The interplay between generation and annealing gives rise to a bell-shaped temperature dependence of the concentration of induced E' centers, peaking at 250 K

KW - Silica, laser effects, annealing

UR - http://hdl.handle.net/10447/38882

M3 - Article

VL - 355

SP - 1038

EP - 1041

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

ER -