TITLE

Highly dense amorphous Nb2O5 films with closed nanosized pores

AUTHOR(S)
Vinnichenko, M.; Rogozin, A.; Grambole, D.; Munnik, F.; Kolitsch, A.; Möller, W.; Stenzel, O.; Wilbrandt, S.; Chuvilin, A.; Kaiser, U.
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/24/2009, Vol. 95 Issue 8, p081904
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This study is focused on tailoring the porosity of Nb2O5 films during reactive pulsed magnetron sputtering. Dense amorphous films containing nanopores only in deeper regions have been grown at a high rate using substrate temperatures below 60 °C. The films exhibit a high refractive index, n400=2.54, a low extinction coefficient, k400∼6×10-4, a low mechanical stress (-90 MPa), and a negligible thermal shift. The specific depth distribution of the nanopores is believed to be the reason for the optimum trade-off between a high refractive index and low mechanical stress.
ACCESSION #
43944911

 

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