Title:
【発明の名称】強誘電体の分極反転構造の形成方法
Document Type and Number:
Japanese Patent JP3038955
Kind Code:
B2
Abstract:
PURPOSE:To surely form the polarization inverting structure without exerting any influence on the optical characteristics of the ferroelectric substance by locally heating only a position where necessary polarization inversion is caused. CONSTITUTION:An electric heating body 3 is adhered to the surface of ferroelectric crystal 1, made of, for example, single-area LiNbOa3(LN), which constitutes a main surface 1a in pattern corresponding to the pattern of the polarization inverting structure of the ferroelectric single crystal 1. This electric heating body 3 can be patterned by photolithographic etching after a conductor layer is vapor-deposited over the entire surface by sputtering. This electric heating body 3 is energized on to generate the temperature gradient of an abrupt temperature drop in the depth direction from the side of the main surface 1a right before the part of the ferroelectric crystal 1 where the electric heating body 3 is adhered. Consequently, an electric field is produced by pyroelectric effect at the heated part from the inside to the main surface 1a and a polarization inverted part 2 shown by an arrow (b) in the opposite direction from an arrow (a) is formed in the ferroelectric crystal 1 opposite the main surface 1a.
Inventors:
Ayumu Taguchi
Masahiro Yamada
Koichiro Kijima
Shin Kawakubo
Masahiro Yamada
Koichiro Kijima
Shin Kawakubo
Application Number:
JP6201491A
Publication Date:
May 08, 2000
Filing Date:
March 26, 1991
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G02F1/37; G02F1/355; G02F1/377; G02F1/35; (IPC1-7): G02F1/37
Domestic Patent References:
| JP348832A | ||||
| JP3260635A | ||||
| JP2187735A |
Other References:
【文献】国際公開90/9094(WO,A1)
Attorney, Agent or Firm:
Hidemori Matsukuma