Electric field poling of ferroelectric materials
US8054536B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2008 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Jun 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of inducing a periodic variation of nonlinearity value in a sample of ferroelectric material comprises arranging a pair of electrodes on opposite faces of the sample, one electrode defining a desired pattern of nonlinearity variation, applying a pre-bias voltage across the sample for a predetermined time using the electrodes, the pre-bias voltage being less than the coercive field of the ferroelectric material; and after the predetermined time, applying a current-controlled poling voltage across the sample using the electrodes, to produce domain inversion in the sample according to the desired pattern of nonlinearity variation. The pre-bias voltage may be 75% of the coercive field or more, and applied for a pre-determined time between 1 and 100 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.