INVITED
Laser Patterning of Nonlinear Optical Single Crystal Lines in Glasses
T. Komatsu, T. Honma
Nagaoka University of Technology Nagaoka, Japan
Corresponding author e-mail: komatsu@mst.nagaokaut.ac.jp
Laser irradiation techniques for the patterning of nonlinear optical/ferroelectric crystal lines such as
LiNbO3, -BaB2O4, Sr0.5Ba0.5Nb2O6, and Ba2TiGe2O8 on the glass surface have been developed [13], i.e., rare-earth/transition metal atom heat processing methods, in which continuous wave lasers
such as Nd:YAG (wavelength: =1064 nm) are irradiated onto glasses containing rare-earth (RE:
Nd3+, Sm3+ etc) or transition metal (TM: Cu2+, Ni2+ etc) ions. The laser energy absorbed by RE or
TM ions results in the local heating of the surrounding of RE or TM ions through the non-radiative
relaxation process, consequently inducing the crystallization. By scanning laser at constant speeds
such as 10 m/s, nonlinear optical/ferroelectric crystal lines are patterned successfully on the
glass surface. The high orientation of crystals in the lines is confirmed from the azimuthal
dependence of second harmonic intensities and linearly polarized micro-Raman scattering spectra,
i.e., the patterning of single crystal lines. It is also possible to pattern two-dimensional crystal
bending or curved lines by just changing the laser scanning direction, and such bending crystal
lines have a potential for optical waveguides.
[1]
[2]
[3]
T. Honma, Y. Benino, T. Fujiwara, R. Sato and T. Komatsu, Appl. Phys. Lett. 83, 2796
(2003).
T. Honma, Y. Benino, T. Fujiwara and T. Komatsu, Appl. Phys. Lett. 88, 231105 (2006).
T. Komatsu, R. Ihara, T. Honma, Y. Benino, R. Sato, H.G. Kim and T. Fujiwara, J. Am.
Ceram. Soc. 90, 699 (2007).
--------------------------------------------PRIMARY TOPIC: I
SECONDARY TOPIC: M
THIRD TOPIC: A2
PREFERRED FORMAT OF PRESENTATION (ORAL): Invited
--------------------------------------------Corresponding author name: Takayuki Komatsu
Corresponding author email: komatsu@mst.nagaokaut.ac.jp