CN101092290A - Method for raising second order nonlinear coefficient of glass - Google Patents
Method for raising second order nonlinear coefficient of glass Download PDFInfo
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- CN101092290A CN101092290A CN 200710052084 CN200710052084A CN101092290A CN 101092290 A CN101092290 A CN 101092290A CN 200710052084 CN200710052084 CN 200710052084 CN 200710052084 A CN200710052084 A CN 200710052084A CN 101092290 A CN101092290 A CN 101092290A
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- 239000011521 glass Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010894 electron beam technology Methods 0.000 claims abstract description 22
- 230000010287 polarization Effects 0.000 claims abstract description 22
- 230000005684 electric field Effects 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000003993 interaction Effects 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims abstract 3
- 239000005304 optical glass Substances 0.000 claims abstract 3
- 239000000075 oxide glass Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000012795 verification Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 230000003287 optical effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000012190 activator Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910005793 GeO 2 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 238000012857 repacking Methods 0.000 description 1
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- 230000003595 spectral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
本发明提供了提高玻璃二阶非线性系数的方法，即：先利用电子束与玻璃相互作用过程中二次发射电子的产生及其变化特性，测得玻璃在外场作用下极化所形成微区小电场的参数；再计算其导致玻璃微结构形成和整体结构变化的情况，同时测试和建立玻璃的二次谐波的大小和关系曲线，然后通过调整外场大小来提高玻璃的二阶非线性系数χ(2)。本发明通过提高外场极化所极化所形成的微区小电场值EDC，找到了提高玻璃的χ(2)的方法；同时，通过测试微区小电场的参数，分析外场对玻璃结构及性能的影响，以及与玻璃二阶非线性的关系验证，找到了提高χ(2)的外场极化条件，从而为制备高性能二阶非线性光学玻璃开辟了新的途径。
The invention provides a method for improving the second-order nonlinear coefficient of glass, that is: firstly, the generation and change characteristics of the secondary emitted electrons during the interaction between the electron beam and the glass are used to measure the micro-area formed by the polarization of the glass under the action of an external field The parameters of the small electric field; then calculate the situation that it leads to the formation of glass microstructure and the change of the overall structure, and at the same time test and establish the size and relationship curve of the second harmonic wave of the glass, and then improve the second-order nonlinear coefficient of the glass by adjusting the size of the external field χ (2) . The present invention finds the method for improving the χ (2) of glass by increasing the micro-area small electric field value E DC formed by the polarization of the external field polarization; at the same time, by testing the parameters of the micro-area small electric field, the external field is analyzed to the glass structure and The impact of performance, and the verification of the relationship with the second-order nonlinearity of the glass, the external field polarization conditions for increasing χ (2) have been found, thus opening up a new way for the preparation of high-performance second-order nonlinear optical glasses.
Description
Technical field
The present invention relates to the opticglass field, particularly relate to a kind of novel method that improves glass properties.
Background technology
In all-optical network, photoswitch and display thereof are one of core technologies, also are one of principal elements that influences the optical-fiber network performance.And the prerequisite that light shutter device is moved is to prepare the nonlinear optical material of excellent property, therefore, nonlinear optical material has caused the great interest of people as the critical material in the photoelectron technology, developing high performance optical material with big nonlinear factor is one of current advanced subject, become the focus of various countries' scholar's research, at non-linear optic crystal, the research of the compound nonlinear material of organic and organic-inorganic aspect, the various countries scholar furthers investigate, numerous paper publishings are also arranged every year, but aspect the non-crystalline state nonlinear optical material, especially the discussion of its nonlinear polarization mechanism also has many need of work further investigations at present.
After in glass, observing second harmonic and producing this strange phenomenon, and a series of good characteristics that glass itself is had make glass exhibit one's skill to the full at optical communication field, because glass is transparent at most of spectral range inner height, have high chemical stability, thermostability and higher third-order non-linear coefficient and fast many excellent characteristic such as time of response, thereby cause attracting attention of domestic and international many experts.Therefore, glass also will be a kind of nonlinear optical material of excellent property, will have broad application prospects on photoelectric devices such as integrated optics, glass planar optical waveguide and photoswitch.The various countries scholar is also launching deep research aspect the nonlinear optical properties of glass, units such as China's Fudan University in Shanghai, Shanghai optical precision optical machinery institute of the Chinese Academy of Sciences, Peking University, Jilin University, Southeast China University and Wuhan University of Technology have also launched many research work in this respect, and have obtained good result.
For glass, according to:
x
(2)＝3x
(3)E
DC
X wherein
(2)Be the second order nonlinear coefficient of glass, x
(3)Be the third-order non-linear coefficient of glass, E
DCBe the little electric field value of formed microcell that polarizes.Want to improve the second order nonlinear coefficient x of glass
(2), have only the third-order non-linear coefficient x that improves glass
(3)With the little electric field value E of the formed microcell of polarization
DCThe various countries investigator mainly concentrates on by various means for improving the second order nonlinear coefficient of glass at present, and synthetic have than big x
(3)The glass system of coefficient, and take different polarization methods, so that glass has bigger second order nonlinear coefficient; And for the little electric field value E of formed microcell that polarizes by raising glass
DCPerformance, thereby the technology that improves second order nonlinear coefficient of glass is few.
Summary of the invention
Technical problem to be solved by this invention is: a kind of novel method that improves second order nonlinear coefficient of glass is provided, and this method passes through to improve the little electric field value of the formed microcell of polarization, thereby provides a kind of different thinking for improving second order nonlinear coefficient of glass.
The technical solution adopted in the present invention is that the step of this method comprises:
(1) utilizes the generation and the variation characteristic thereof of secondary emission electron in electron beam and the glass interaction process, record glass under outer field action, polarize direction, size, stability, the relaxation property of the little electric field of microcell that forms;
(2) by the parameters of the little electric field of step (1) gained microcell, calculate it and cause the situation that silica micro structure forms and one-piece construction changes, and the second harmonic performance of while tested glass;
The relation of the situation that (3) establishment step (2) gained silica micro structure forms, one-piece construction changes and the second harmonic size of glass;
(4) according to step (3) gained relation, the relation curve of establishment step (1) centre field size and second order nonlinear coefficient of glass;
(5) according to step (4) gained relation, improve second order nonlinear coefficient of glass by accurate adjustment outfield size.
The present invention compared with prior art, its major advantage is: by improving the little electric field value E of the outfield polarization formed microcell of polarization
DCTherefore, improved the second order nonlinear coefficient x of glass
(2), that is to say the method that improves the quadratic nonlinearity coefficient of glass that found.Simultaneously, size and performance by test analysis glass little electric field of formed microcell under the polarization condition of outfield, analyze the outfield to glass structure and Effect on Performance, and with the checking of the relation of glass second nonlinear, found the outfield polarization condition that can greatly improve the quadratic nonlinearity coefficient of glass, thereby opened up new approach for preparing high-performance second nonlinear optic glass.
Description of drawings
Fig. 1 is the SEM-LEO 440 testing apparatus structural representations through repacking.
Fig. 2 is that the secondary emission electron of H:Ge:SiO2 film under the room temperature produces (δ) result schematic diagram.
Fig. 3 is the little direction of an electric field of polarization of hot polar H:Ge:SiO2 film.
Fig. 4 is the H:SiO that is mixed with Ge
2The structural representation of PEVCD film.
Embodiment
The invention provides the method for the raising second order nonlinear coefficient of glass that a kind of employing may further comprise the steps, that is:
(1) utilizes the generation and the variation characteristic thereof of secondary emission electron in electron beam and the glass interaction process, record under outer field action, the polarize parameter that comprises direction, size, stability and relaxation property of the little electric field of microcell that forms of glass;
(2) by the parameters of the little electric field of step (1) gained microcell, calculate it and cause the situation that silica micro structure forms and one-piece construction changes, and the second harmonic performance of while tested glass;
The relation of the situation that (3) establishment step (2) gained silica micro structure forms, one-piece construction changes and the second harmonic size of glass;
(4) according to step (3) gained relation, the relation of establishment step (1) centre field size and second order nonlinear coefficient of glass;
(5), improve second order nonlinear coefficient of glass by accurate adjustment outfield size according to step (4) gained relation curve.
The present invention also provides the equipment of the little electric pulse field parameter of microcell described in a kind of test procedure (1), its structure as shown in Figure 1: comprise that electron-beam generator EBBU, focusing objective len, electron collector, sample cavity, signal amplifier, oscilloscope and electron beam produce activator appliance; Electron beam produces activator appliance and is connected to oscillographic first input terminus, electron collector is equipped with in the focusing objective len lower end, electron collector is connected to oscillographic second input terminus by signal amplifier, and show sample is because the secondary electron quantity of electric charge Q that beam bombardment produced
SBElectron collector has electron beam hole simultaneously, and the electron collector below is a sample cavity, captures portions of electronics when focused beam produces secondary electron by electron beam hole bombardment sample, so just produces the electronics of inducing of equivalent amount on sample cavity; Sample cavity is connected to oscillographic the 3rd input terminus demonstration by signal amplifier and induces electronic charge Q
SB
Electron collector can directly be read collected number of electrons by oscilloscope.Among Fig. 1: Q
ICFor inducing electronic charge, Q
TBe the trapped electron quantity of electric charge, Q
SBBe the secondary electron and the backscattered electron quantity of electric charge that produces.
Q wherein
IC=-Q
T, Q
0=Q
SB+ Q
IC, secondary emission electron value δ (D J) is defined as:
Quantity of electric charge D in the size of δ and the experiment (〉=0.01pC) or electric density σ and current density, J (〉=10
+ 3PAcm
-2) size relevant.Under different electronic beam currents or voltage, the little electric field of microcell will show different various performance characteristics, the value that detects in the experiment can be studied the characteristic of the glass polarization little electric field of microcell that forms by these variations, thereby carry out the POLARIZATION MECHANISM analysis also with different.
The working process of testing apparatus of the present invention is: as shown in Figure 1, the electron beam A that electron-beam generator produces total charge dosage after electron beam produces the activator appliance activation is Q
0, show its number by oscilloscope.The electron beam Q that is activated
0(being A ') directly bombarded and produced secondary electron on the sample after process focusing objective len (being the object lens shown in Fig. 1) focused on, and its electric weight is Q
SBPortions of electronics is captured by sample in the beam bombardment sample simultaneously, and its electric weight is Q
TBecause producing on the electron collector that acts on sample cavity of these trapped electrons and inducing electronics, its quantity of electric charge is Q
ICQ wherein
ICAnd Q
TQuantity equates, opposite in sign.Secondary electron and induce electronics to be amplified by signal amplifier after send into oscilloscope respectively and show its quantity.Like this, (D, J) calculation formula is calculated the δ size according to three kinds of quantities of electric charge shown in the oscilloscope and δ.
Raising second order nonlinear coefficient of glass provided by the invention, its application in preparation high-performance second nonlinear optic glass.For example: the application in oxide glass and the contour nonlinear second-order optical susceptibility glass of nonoxide glass.
The invention will be further described below in conjunction with concrete Application Example, but do not limit the present invention.
Embodiment
Mix the H:SiO of Ge
2PEVCD film, its structure are the SiO that mixes Ge of 1.1 μ m
2Layer is plated in SiO
2On the substrate, there is the SiO of one deck 1 μ m the centre
2The transition layer (see figure 4), the concrete composition of film is 76 ± 1mol%SiO
2, 23 ± 1mol%GeO
2, 1.5 ± 0.5mol%O
2And a small amount of ppm H
2Film does not pass through any anneal before polarization, on both ends of the surface, plate～the Al electrode of 1.2 μ m carry out thermoaeization, and concrete polarization condition is: polarization volts DS-30V～-100V, polarization time 15min, 375 ℃ of polarization temperature.Adopt H after the sample polarization
3PO
4Immersion 20min removes the Al electrode and carries out the secondary emission electron test again under 75 ℃ of temperature.Secondary emission electron produces test result as shown in Figure 2, beam energy E=5keV wherein, incident degree of depth 530nm, the little incident electron beam dose of Fig. 2 a＜1.210
6PC/cm
2, the big electron beam incident dosage 2.510 of Fig. 2 b
8PC/cm
2Polarize little direction of an electric field as shown in Figure 3.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100520843A CN101092290B (en) | 2007-04-30 | 2007-04-30 | Method for raising second order nonlinear coefficient of glass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100520843A CN101092290B (en) | 2007-04-30 | 2007-04-30 | Method for raising second order nonlinear coefficient of glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101092290A true CN101092290A (en) | 2007-12-26 |
| CN101092290B CN101092290B (en) | 2011-03-16 |
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ID=38990754
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100520843A Expired - Fee Related CN101092290B (en) | 2007-04-30 | 2007-04-30 | Method for raising second order nonlinear coefficient of glass |
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475322B (en) * | 2009-01-13 | 2011-02-09 | 武汉理工大学 | A method of generating second harmonic generation properties in glass |
| CN113165881A (en) * | 2018-10-18 | 2021-07-23 | 康宁股份有限公司 | Graphene doping by thermal polarization |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434699A (en) * | 1991-01-23 | 1995-07-18 | Yeda Research And Development Co., Ltd. | Method and system for producing second order nonlinear optical effects using in-plane poled polymer films |
| JP4097763B2 (en) * | 1997-03-27 | 2008-06-11 | 松下電器産業株式会社 | Secondary nonlinear optical member, method for manufacturing the same, and light modulation element |
-
2007
- 2007-04-30 CN CN2007100520843A patent/CN101092290B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475322B (en) * | 2009-01-13 | 2011-02-09 | 武汉理工大学 | A method of generating second harmonic generation properties in glass |
| CN113165881A (en) * | 2018-10-18 | 2021-07-23 | 康宁股份有限公司 | Graphene doping by thermal polarization |
| CN113165881B (en) * | 2018-10-18 | 2024-04-05 | 康宁股份有限公司 | Graphene doping via thermal polarization |
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| Publication number | Publication date |
|---|---|
| CN101092290B (en) | 2011-03-16 |
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