Spectral heterogeneity of oxygen deficient centers in Ge-doped silica

Roberto Boscaino, Franco Mario Gelardi, Maurizio Leone, Marco Cannas, Simonpietro Agnello, Andrea Cannizzo, Stefania Grandi, Marco Cannas, Simonpietro Agnello, Roberto Boscaino, Franco M. Gelardi

Risultato della ricerca: Article

5 Citazioni (Scopus)

Abstract

We report an experimental investigation of the emission spectra of a 1000 molppm sol-gel Ge-doped silica by fine tuning the excitation energy in the ultraviolet (UV) range, around 5 eV, and in the vacuum-UV range, around 7.3 eV, at room temperature and at 10 K. The sample is characterized by a blue (centered at ∼ 3.2 eV) and an UV (centered at ∼ 4.3 eV) bands. We have found that the ratio between the area of the blue and the UV bands depends on the temperature and on the excitation energy in both the vacuum-UV and the UV range. At both temperatures the spectral features of the blue and the UV bands are weakly affected when the excitation is varied in the vacuum-UV. At variance, under UV excitation the peaks of the bands are shifted and also their widths are changed. These results are interpreted in terms of distinct excitation channels of the luminescence that are influenced in a different way by the structural inhomogeneity of point defects.
Lingua originaleEnglish
pagine (da-a)645-648
Numero di pagine4
RivistaRadiation Measurements
Volume38
Stato di pubblicazionePublished - 2004

All Science Journal Classification (ASJC) codes

  • Radiation

Cita questo

Spectral heterogeneity of oxygen deficient centers in Ge-doped silica. / Boscaino, Roberto; Gelardi, Franco Mario; Leone, Maurizio; Cannas, Marco; Agnello, Simonpietro; Cannizzo, Andrea; Grandi, Stefania; Cannas, Marco; Agnello, Simonpietro; Boscaino, Roberto; Gelardi, Franco M.

In: Radiation Measurements, Vol. 38, 2004, pag. 645-648.

Risultato della ricerca: Article

Boscaino, R, Gelardi, FM, Leone, M, Cannas, M, Agnello, S, Cannizzo, A, Grandi, S, Cannas, M, Agnello, S, Boscaino, R & Gelardi, FM 2004, 'Spectral heterogeneity of oxygen deficient centers in Ge-doped silica', Radiation Measurements, vol. 38, pagg. 645-648.
Boscaino, Roberto ; Gelardi, Franco Mario ; Leone, Maurizio ; Cannas, Marco ; Agnello, Simonpietro ; Cannizzo, Andrea ; Grandi, Stefania ; Cannas, Marco ; Agnello, Simonpietro ; Boscaino, Roberto ; Gelardi, Franco M. / Spectral heterogeneity of oxygen deficient centers in Ge-doped silica. In: Radiation Measurements. 2004 ; Vol. 38. pagg. 645-648.
@article{1041322b6dd646679632b7ea46d269a3,
title = "Spectral heterogeneity of oxygen deficient centers in Ge-doped silica",
abstract = "We report an experimental investigation of the emission spectra of a 1000 molppm sol-gel Ge-doped silica by fine tuning the excitation energy in the ultraviolet (UV) range, around 5 eV, and in the vacuum-UV range, around 7.3 eV, at room temperature and at 10 K. The sample is characterized by a blue (centered at ∼ 3.2 eV) and an UV (centered at ∼ 4.3 eV) bands. We have found that the ratio between the area of the blue and the UV bands depends on the temperature and on the excitation energy in both the vacuum-UV and the UV range. At both temperatures the spectral features of the blue and the UV bands are weakly affected when the excitation is varied in the vacuum-UV. At variance, under UV excitation the peaks of the bands are shifted and also their widths are changed. These results are interpreted in terms of distinct excitation channels of the luminescence that are influenced in a different way by the structural inhomogeneity of point defects.",
author = "Roberto Boscaino and Gelardi, {Franco Mario} and Maurizio Leone and Marco Cannas and Simonpietro Agnello and Andrea Cannizzo and Stefania Grandi and Marco Cannas and Simonpietro Agnello and Roberto Boscaino and Gelardi, {Franco M.}",
year = "2004",
language = "English",
volume = "38",
pages = "645--648",
journal = "Radiation Measurements",
issn = "1350-4487",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Spectral heterogeneity of oxygen deficient centers in Ge-doped silica

AU - Boscaino, Roberto

AU - Gelardi, Franco Mario

AU - Leone, Maurizio

AU - Cannas, Marco

AU - Agnello, Simonpietro

AU - Cannizzo, Andrea

AU - Grandi, Stefania

AU - Cannas, Marco

AU - Agnello, Simonpietro

AU - Boscaino, Roberto

AU - Gelardi, Franco M.

PY - 2004

Y1 - 2004

N2 - We report an experimental investigation of the emission spectra of a 1000 molppm sol-gel Ge-doped silica by fine tuning the excitation energy in the ultraviolet (UV) range, around 5 eV, and in the vacuum-UV range, around 7.3 eV, at room temperature and at 10 K. The sample is characterized by a blue (centered at ∼ 3.2 eV) and an UV (centered at ∼ 4.3 eV) bands. We have found that the ratio between the area of the blue and the UV bands depends on the temperature and on the excitation energy in both the vacuum-UV and the UV range. At both temperatures the spectral features of the blue and the UV bands are weakly affected when the excitation is varied in the vacuum-UV. At variance, under UV excitation the peaks of the bands are shifted and also their widths are changed. These results are interpreted in terms of distinct excitation channels of the luminescence that are influenced in a different way by the structural inhomogeneity of point defects.

AB - We report an experimental investigation of the emission spectra of a 1000 molppm sol-gel Ge-doped silica by fine tuning the excitation energy in the ultraviolet (UV) range, around 5 eV, and in the vacuum-UV range, around 7.3 eV, at room temperature and at 10 K. The sample is characterized by a blue (centered at ∼ 3.2 eV) and an UV (centered at ∼ 4.3 eV) bands. We have found that the ratio between the area of the blue and the UV bands depends on the temperature and on the excitation energy in both the vacuum-UV and the UV range. At both temperatures the spectral features of the blue and the UV bands are weakly affected when the excitation is varied in the vacuum-UV. At variance, under UV excitation the peaks of the bands are shifted and also their widths are changed. These results are interpreted in terms of distinct excitation channels of the luminescence that are influenced in a different way by the structural inhomogeneity of point defects.

UR - http://hdl.handle.net/10447/22690

UR - https://www.sciencedirect.com/science/article/pii/S1350448703003512

M3 - Article

VL - 38

SP - 645

EP - 648

JO - Radiation Measurements

JF - Radiation Measurements

SN - 1350-4487

ER -