Orientation-controlled epitaxy of A2CuO3 (A: Sr, Ca) films with large optical nonlinearity

T. Manako, Y. Okimoto, M. Izumi, S. Shinomori, M. Kawasaki, H. Kishida, H. Okamoto, T. Fukumura, M. Ohtani, Y. Tokura

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The one-dimensional Cu-O chains responsible for the large optical nonlinearity in Sr2CuO3 (SCO) and Ca2CuO3 (CCO) are aligned in one direction in films grown on LaSrAlO4 (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 Sr2TiO4 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.

Original languageEnglish
Pages (from-to)1754-1756
Number of pages3
JournalApplied Physics Letters
Issue number12
Publication statusPublished - 2001 Sept 17


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