Second harmonic generation in periodically polarity-inverted zinc oxide.
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.
Park
Jinsub
J
Center for Interdisciplinary Research, Tohoku University, Sendai 980-8578, Japan.
Yamazaki
Yoshiki
Y
Iwanaga
Masanobu
M
Ahn
Sungmo
S
Jeon
Heonsu
H
Fujiwara
Takumi
T
Yao
Takafumi
T