title: Second harmonic generation in periodically polarity-inverted zinc oxide.
abstract: We report on the second harmonic generation (SHG) in 2D periodically polarity-inverted (PPI) ZnO heterostructures. The grating structures with nanometer-scale periodicity are fabricated on (0001) Al(2)O(3) substrates by using the in situ polarity inversion method. The achievements of SHG with grating in fabricated PPI ZnO structures are demonstrated under consideration of quasi phase matching conditions. In general, grating formation using the this periodical array of differnet polar surface can be extended to the other heteroepitaxial systems with polarity characteristics.
authors.affiliation: Center for Interdisciplinary Research, Tohoku University, Sendai 980-8578, Japan.
authors.forename: Jinsub
authors.initials: J
authors.lastname: Park
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Yamazaki
authors.forename: Masanobu
authors.initials: M
authors.lastname: Iwanaga
authors.forename: Sungmo
authors.initials: S
authors.lastname: Ahn
authors.forename: Heonsu
authors.initials: H
authors.lastname: Jeon
authors.forename: Takumi
authors.initials: T
authors.lastname: Fujiwara
authors.forename: Takafumi
authors.initials: T
authors.lastname: Yao