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Polarizing electrode for polarizing ferroelectric crystal material

A technology of polarized electrodes and ferroelectric crystals, applied in nonlinear optics, instruments, optics, etc., to achieve easy-to-achieve effects

Active Publication Date: 2014-05-28
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of this, the main purpose of the present invention is to provide a kind of polarized electrode that polarizes the ferroelectric crystal material, to solve the problem of using the external electric field polarization method to prepare small-period periodic and quasi-periodic periodic inversion ferroelectric crystals. Material issues, realizing periodic poling of small-period periodic and quasi-periodic periodic inversion ferroelectric crystal materials with a period less than 5 μm

Method used

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  • Polarizing electrode for polarizing ferroelectric crystal material
  • Polarizing electrode for polarizing ferroelectric crystal material
  • Polarizing electrode for polarizing ferroelectric crystal material

Examples

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Embodiment

[0036] In this example, a periodically poled lithium niobate crystal with a period of 4.2 μm is obtained through such a polarized electrode, which is suitable for frequency doubling output of light waves with a wavelength of 850 nm.

[0037] Step 1. First design a comb-shaped photo-grid electrode with a period of 4.2 μm and an electrode width of 1 μm. The comb-shaped photo-gate electrode has a plurality of comb-shaped photo-grid electrode strips, such as image 3 shown in the first part of .

[0038] Step 2. Design strip rectangular electrodes on the basis of step 1, such as image 3 As shown in the second part of , the strip-shaped rectangular electrode is arranged between the grating electrode strips of the comb-shaped photo-grid electrode, and the width is smaller than the distance between the grating electrode strips. Generally, the strip-shaped rectangular electrode has a width of 1 μm, is located between the grating electrode strips of the comb-shaped photo-grid electro...

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Abstract

The invention discloses a polarizing electrode for polarizing a ferroelectric crystal material, which is used for preparing small-period and quasiperiodic periodically-reverse ferroelectric crystals and comprises a comb-shaped optical grating polarization electrode with a plurality of comb-shaped optical grating electrode bars and strip-shaped rectangular electrodes arranged between the comb-shaped optical grating electrode bars between the comb-shaped optical grating polarization electrode and with width smaller than intervals between the comb-shaped optical grating electrode bars. The small-period and quasiperiodic periodically-reverse ferroelectric crystal material can be prepared by means of the method of additional electric field polarization, periodic polarization of the small-period and quasiperiodic periodically-reverse ferroelectric crystal material with a period smaller than 5 mum, and the small-period and quasiperiodic periodically-reverse ferroelectric crystals can be prepared.

Description

technical field [0001] The invention relates to the technical field of post-processing of ferroelectric crystal materials, in particular to a polarizing electrode for polarizing ferroelectric crystal materials. Background technique [0002] Quasi-phase matching (QPM) technology is to compensate the phase mismatch between the interacting light waves caused by the refractive index dispersion by periodically modulating the nonlinear polarizability of the crystal, so as to obtain the enhancement of the nonlinear optical effect, that is, to use The periodic jump of nonlinear polarizability is used to realize the enhancement of nonlinear optical frequency conversion efficiency. And which method to use to polarize the ferroelectric crystal material is the key to preparing the periodic inversion ferroelectric crystal, especially what method to use to polarize the ferroelectric crystal material to prepare a small period periodic inversion ferroelectric crystal. Transistor is one of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35G02F1/37
Inventor 郑婉华范学东马传龙马绍栋齐爱谊
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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