Search: L773:0946 2171 OR L773:1432 0649 >
Efficient upconvert...
Efficient upconvertion of photoluminescence via two-photon-absorption in bulk and nanorod ZnO
-
- Chen, Shula (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
-
- Stehr, Jan Eric (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska fakulteten
-
- Koteeswara Reddy, N. (author)
- Gwangju Institute of Science and Technology, Republic of Korea
-
show more...
-
- Tu, C. W. (author)
- Gwangju Institute of Science and Technology, Republic of Korea
-
- Chen, Weimin (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
-
- Buyanova, Irina (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
-
show less...
-
(creator_code:org_t)
- 2012-09-15
- 2012
- English.
-
In: Applied physics. B, Lasers and optics (Print). - : Springer. - 0946-2171 .- 1432-0649. ; 108:4, s. 919-924
- Related links:
-
https://liu.diva-por... (primary) (Raw object)
-
show more...
-
http://liu.diva-port...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- Efficient upconversion of photoluminescence from donor-bound excitons is revealed in bulk and nanorod ZnO. Based on excitation power-dependent PL measurements performed with different energies of excitation photons, two-photon absorption (TPA) and two-step TPA (TS-TPA) processes are concluded to be responsible for the upconversion. The TS-TPA process is found to occur via a defect/impurity (or defects/impurities) with an energy level (or levels) lying within 1.14–1.56 eV from one of the band edges, without involving photon recycling. One of the possible defect candidates could be VZn. A sharp energy threshold, different from that for the corresponding one-photon absorption, is observed for the TPA process and is explained in terms of selection rules for the involved optical transitions.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database