Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation
Temperature quenching characteristics of infrared-to-visible frequency up-conversion (UC) in erbium doped zinc tellurite glasses under infrared excitation 797 tun are presented. A comprehensive 4-level model has been developed and the derived rate equations have been exploited to examine the thermal...
Saved in:
Main Authors: | , , , |
---|---|
Format: | Article |
Published: |
NISCAIR-CSIR
2011
|
Subjects: | |
Online Access: | http://eprints.utm.my/id/eprint/29427/ http://nopr.niscair.res.in/handle/123456789/12452 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
my.utm.29427 |
---|---|
record_format |
eprints |
spelling |
my.utm.294272019-03-31T08:23:01Z http://eprints.utm.my/id/eprint/29427/ Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation Ghoshal, Sib Krishna Sahar, Md. Rahim Rohani, Md. Supar Sharma, S. QC Physics Temperature quenching characteristics of infrared-to-visible frequency up-conversion (UC) in erbium doped zinc tellurite glasses under infrared excitation 797 tun are presented. A comprehensive 4-level model has been developed and the derived rate equations have been exploited to examine the thermal quenching of efficiency and emission intensity for the UC. The green (4S3/2→4I15/2) and red (4F9/2→4I15/2) emissions over a temperature range 10-340 K and at concentration 2.0 mol% have been studied. The green emission shows a continuous increase with decrease of temperature while the red emission is not that sensitive to temperature. In addition, the temperature dependence on the multi-phonon relaxation rates is fitted with 4 phonons processes. These features are attributed to the non-radiative (NR) energy transfer processes, trapped impurity effects and thermal assisted hopping. It is further indicated that to achieve higher infrared to visible up-converted efficiency in zinc tellurite glasses the NR channels for energy and charge transfer by phonon and impurity mediated process has to be minimized. Our results on pump power dependent emission intensity, quantum efficiency, luminescence intensity and NR multi-phonon relaxation rates are in conformity with other findings. The present systematic study provides useful information for further development of UC lasers. NISCAIR-CSIR 2011-08 Article PeerReviewed Ghoshal, Sib Krishna and Sahar, Md. Rahim and Rohani, Md. Supar and Sharma, S. (2011) Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation. Indian Journal of Pure & Applied Physics, 49 (8). pp. 509-515. ISSN 0019-5596 http://nopr.niscair.res.in/handle/123456789/12452 |
institution |
Universiti Teknologi Malaysia |
building |
UTM Library |
collection |
Institutional Repository |
continent |
Asia |
country |
Malaysia |
content_provider |
Universiti Teknologi Malaysia |
content_source |
UTM Institutional Repository |
url_provider |
http://eprints.utm.my/ |
topic |
QC Physics |
spellingShingle |
QC Physics Ghoshal, Sib Krishna Sahar, Md. Rahim Rohani, Md. Supar Sharma, S. Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation |
description |
Temperature quenching characteristics of infrared-to-visible frequency up-conversion (UC) in erbium doped zinc tellurite glasses under infrared excitation 797 tun are presented. A comprehensive 4-level model has been developed and the derived rate equations have been exploited to examine the thermal quenching of efficiency and emission intensity for the UC. The green (4S3/2→4I15/2) and red (4F9/2→4I15/2) emissions over a temperature range 10-340 K and at concentration 2.0 mol% have been studied. The green emission shows a continuous increase with decrease of temperature while the red emission is not that sensitive to temperature. In addition, the temperature dependence on the multi-phonon relaxation rates is fitted with 4 phonons processes. These features are attributed to the non-radiative (NR) energy transfer processes, trapped impurity effects and thermal assisted hopping. It is further indicated that to achieve higher infrared to visible up-converted efficiency in zinc tellurite glasses the NR channels for energy and charge transfer by phonon and impurity mediated process has to be minimized. Our results on pump power dependent emission intensity, quantum efficiency, luminescence intensity and NR multi-phonon relaxation rates are in conformity with other findings. The present systematic study provides useful information for further development of UC lasers. |
format |
Article |
author |
Ghoshal, Sib Krishna Sahar, Md. Rahim Rohani, Md. Supar Sharma, S. |
author_facet |
Ghoshal, Sib Krishna Sahar, Md. Rahim Rohani, Md. Supar Sharma, S. |
author_sort |
Ghoshal, Sib Krishna |
title |
Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation |
title_short |
Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation |
title_full |
Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation |
title_fullStr |
Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation |
title_full_unstemmed |
Temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation |
title_sort |
temperature dependent luminescence in erbium-doped zinc tellurite glass: a model investigation |
publisher |
NISCAIR-CSIR |
publishDate |
2011 |
url |
http://eprints.utm.my/id/eprint/29427/ http://nopr.niscair.res.in/handle/123456789/12452 |
_version_ |
1643648295886651392 |
score |
13.160551 |