Opto-ferroelectric memories using vinylidene fluoride and trifluoroethylene copolymers

Author

Date, M. ; Furukawa, T. ; Yamaguchi, T. ; Kojima, A. ; Shibata, I.

Author_Institution

Inst. of Phys. & Chem. Res., Saitama, Japan

Volume

24

Issue

3

fYear

1989

fDate

6/1/1989 12:00:00 AM

Firstpage

537

Lastpage

540

Abstract

It is shown how ferroelectric polymers can be applied to an erasable optical memory. The medium developed consists of a dye-doped vinylidene-fluoride-trifluoroethylene copolymer film with a thickness of 2 μm, spin-coated onto an ITO-coated glass plate. Information is written in terms of sequences of positive and negative polarizations generated by irradiating a focused laser beam of ~5-μm diameter, in the presence of sign-controlled electric fields. The data are read out pyroelectrically by scanning the laser beam. A C/N ratio of 48 dB has been obtained for the 0/1 data train, in a 20-μm pitch

Keywords

ferroelectric devices; optical storage; polymer blends; polymer films; C/N ratio; ITD coated glass plate; dye doped film; erasable optical memory; ferroelectric polymers; focused laser beam; laser beam scanning; negative polarizations; polyvinylidene fluoride trifluoroethylene copolymer film; positive polarization; pyroelectric reading; sign-controlled electric fields; spin coating; Absorption; Electrodes; Ferroelectric materials; Glass; Laser beams; Optical films; Optical polymers; Polarization; Pyroelectricity; Writing;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.30901

Filename

30901