TITLE

Orientation-controlled epitaxy of A[sub 2]CuO[sub 3] (A: Sr, Ca) films with large optical nonlinearity

AUTHOR(S)
Manako, T.; Okimoto, Y.; Izumi, M.; Shinomori, S.; Kawasaki, M.; Kishida, H.; Okamoto, H.; Fukumura, T.; Ohtani, M.; Tokura, Y.
PUB. DATE
September 2001
SOURCE
Applied Physics Letters;9/17/2001, Vol. 79 Issue 12, p1754
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The one-dimensional Cu–O chains responsible for the large optical nonlinearity in Sr[sub 2]CuO[sub 3] (SCO) and Ca[sub 2]CuO[sub 3] (CCO) are aligned in one direction in films grown on LaSrAlO[sub 4] (LSAO) (1 0 0) substrates by using pulsed laser deposition. The CCO films deposited directly on lattice matched LSAO substrates have a single orientation with high crystallinity, while the SCO films include small portions of misoriented domains. Using a simple model of lattice mismatch, we developed a Sr[sub 2]TiO[sub 4] buffer layer in order to grow orientation-controlled SCO films with both high crystallinity and a sharp optical absorption edge. This technique will be a key to fabricating ultrafast all-optical switches with a waveguide structure. © 2001 American Institute of Physics.
ACCESSION #
5145235

 

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