Abstract:
:In this article, we report the first observation of nanosecond laser induced transient dual absorption bands, one in the bandgap (TA₁) and another in the sub-bandgap (TA₂) regions of a-Ge₅As₃₀Se₆₅ thin films. Strikingly, these bands are thermally tunable and exhibit a unique contrasting characteristic: the magnitude of TA₁ decreases while that of TA₂ increases with increasing temperature. Further, the decay kinetics of these bands is strongly influenced by the temperature, which signifies a strong temperature dependent exciton recombination mechanism. The induced absorption shows quadratic and the decay time constant shows linear dependence on the laser beam fluence.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Khan P,Saxena T,Jain H,Adarsh KVdoi
10.1038/srep06573subject
Has Abstractpub_date
2014-10-10 00:00:00pages
6573issn
2045-2322pii
srep06573journal_volume
4pub_type
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