WO2005019921A1 - 分極反転部の製造方法および光デバイス - Google Patents
分極反転部の製造方法および光デバイス Download PDFInfo
- Publication number
- WO2005019921A1 WO2005019921A1 PCT/JP2004/011575 JP2004011575W WO2005019921A1 WO 2005019921 A1 WO2005019921 A1 WO 2005019921A1 JP 2004011575 W JP2004011575 W JP 2004011575W WO 2005019921 A1 WO2005019921 A1 WO 2005019921A1
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- WO
- WIPO (PCT)
- Prior art keywords
- single crystal
- substrate
- electrode
- conductive film
- domain
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/355—Non-linear optics characterised by the materials used
- G02F1/3558—Poled materials, e.g. with periodic poling; Fabrication of domain inverted structures, e.g. for quasi-phase-matching [QPM]
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/37—Non-linear optics for second-harmonic generation
- G02F1/377—Non-linear optics for second-harmonic generation in an optical waveguide structure
- G02F1/3775—Non-linear optics for second-harmonic generation in an optical waveguide structure with a periodic structure, e.g. domain inversion, for quasi-phase-matching [QPM]
Definitions
- the present invention relates to a method for manufacturing a domain-inverted portion and an optical device.
- an optical frequency modulator that uses surface acoustic waves By periodically forming a domain-inverted structure that forcibly reverses the polarization of a ferroelectric, an optical frequency modulator that uses surface acoustic waves, an optical wavelength conversion element that uses non-linear polarization inversion, etc. Can be realized.
- a highly efficient wavelength conversion element can be manufactured, and if this is used to convert light such as a solid-state laser,
- a compact and lightweight short-wavelength light source that can be applied to fields such as printing, optical information processing, and optical measurement and control can be configured.
- a so-called voltage application method is known as a technique for forming a periodic domain-inverted structure in a ferroelectric nonlinear optical material.
- a comb-shaped electrode is formed on one main surface of a ferroelectric single crystal substrate, a uniform electrode is formed on the other main surface, and a pulse voltage is applied between the two.
- a pulse voltage is applied between the two.
- comb-shaped electrodes are periodically arranged on the upper surface of the substrate, uniform electrodes are formed on the lower surface, and a voltage is supplied so as to exceed the coercive electric field.
- a domain-inverted structure can be obtained.
- a periodically poled structure was obtained in a part of the comb-shaped electrode. It may not be formed in other regions, and it is difficult to form a good periodic domain-inverted portion over the entire comb electrode.
- An object of the present invention is to form a good periodic domain-inverted portion over the entire comb-shaped electrode when manufacturing a domain-inverted portion on a single-domain ferroelectric single crystal substrate by a so-called voltage application method. It is to be.
- a comb-shaped electrode is provided on one main surface of a single-domain ferroelectric single-crystal substrate, and a uniform electrode is provided on the other main surface of the substrate.
- Producing a domain-inverted portion by applying a voltage between the substrate main body, the first conductive film provided on one main surface of the substrate main body, and the other main body of the substrate main body.
- An undersubstrate having a second conductive film provided on the surface is laminated with a ferroelectric single crystal substrate.
- the uniform electrode and the first conductive film are electrically connected, and the comb-shaped electrode is It is characterized in that a domain-inverted portion is formed in the ferroelectric single crystal substrate by applying a voltage between the second conductive film and the second conductive film.
- the present invention relates to an optical device comprising a domain-inverted portion manufactured by this method.
- the inventors of the present invention have found the reason why it is difficult to form a good periodic domain-inverted portion over the entire comb-shaped electrode in, for example, a lithium niobate single crystal doped with Mg M, and obtained the following knowledge. That is, MgO is doped It is considered that lithium niobate has a low coercive electric field and easily forms a domain-inverted structure even at low voltage. As a result, when a domain-inverted region is formed in a part of the comb-shaped electrode on the substrate, the domain-inverted portion has a low resistance, and current easily flows.
- Lithium niobate to which Zn 0 is added has a low coercive electric field similarly to lithium niobate to which Mg is added, and therefore, similar results are expected.
- a separate base substrate 13 as shown in FIG. That is, for example, a comb-shaped electrode 3 is formed on one main surface 1a of a substrate 2 made of MgO-doped lithium niobate single crystal, and a uniform electrode 4 is formed on the other main surface 2b of the substrate 2. ing. Under this substrate 2, a separate base substrate 13 is laminated. A first conductive film 6 is formed on one main surface 5 a of the main body 5 of the base substrate 13, and a second conductive film 7 is formed on the other main surface 5 b of the main body 5. In this example, the first conductive film 6 and the uniform electrode were brought into contact with each other to electrically connect them, but a separate conductive material (preferably, By interposing the conductive film, both can be electrically connected.
- the insulating oil 8 is stored in the container 9, and the laminate 1 is immersed in the insulating oil 8.
- the electric wire 11 is connected to the comb electrode 3, and the electric wire 10 is connected to the second conductive film 7.
- Wires 10 and 11 are connected to a high voltage source 12. In this state, when a predetermined voltage and a pulse-like voltage having a pulse width are applied, a periodic domain-inverted portion is formed between the comb electrode 3 and the uniform electrode 4.
- the base substrate 13 is also laminated, and the conductive films 6 and 7 on the base substrate 13 are It has been found that by applying a voltage through the electrode, periodic polarization inversion portions are generated in the comb-shaped electrode 3 as a whole throughout the present invention, and the present invention has been achieved.
- FIG. 1 is a front view showing a laminate 1 of the substrates 2 and 5.
- FIG. 2 is a schematic diagram showing an apparatus for forming a domain-inverted portion in the laminate 1 by a voltage application method.
- FIG. 3 is a top view of the apparatus of FIG.
- FIG. 4 is an optical microscope photograph of the surface (+ z plane) 2 a of the substrate 2.
- FIG. 5 is an optical microscope photograph showing a cross section (y-plane) of a portion of the substrate 2 where the domain-inverted portions are formed.
- the type of the ferroelectric single crystal constituting the ferroelectric single crystal substrate 2 is not limited. However, lithium niobate (L LiNbO 3), lithium tantalate (L i Ta0 3), lithium niobate - Dantaru lithium solid solution, K 3 L i 2 N b 50! Each single crystal of 5 is particularly preferred.
- a group consisting of magnesium (Mg), zinc (Zn), scandium (S c), and indium (In) is used.
- Mg magnesium
- Zn zinc
- S c scandium
- In indium
- One or more selected metal elements can be contained, and magnesium is particularly preferred. From the viewpoint that the polarization reversal characteristics (conditions) are clear, it is particularly preferable to add magnesium to each of lithium niobate single crystal, lithium niobate monolithium lithium tantalate solid solution single crystal, and lithium lithium tantalate single crystal.
- a rare earth element can be contained as a doping component in the strong dielectric single crystal. This rare earth element acts as an additional element for laser oscillation.
- the rare earth element Nd, Er, Tm, Ho, Dy, and Pr are particularly preferable.
- the conductivity of the ferroelectric single crystal is increased as described above, and it is difficult to form a periodically poled portion. It becomes.
- the present invention is particularly suitable for such a case.
- the material of the comb electrode and the uniform electrode used in the voltage application method is not limited, but Al, Au, Ag, Cr, Cu, Ni, Ni-Cr, Pd, and Ta are preferable.
- the material of the first conductive film and the second conductive film is not limited, but Al, Au, Ag, Cr, Cu, Ni, Ni-Cr, Pd, and Ta are preferable.
- the material of the substrate body 5 of the base substrate must have high insulation properties, a uniform volume resistivity within the material, and a predetermined structural strength.
- this material include sapphire, quartz, and glass.
- an offcut X plate, an offcut Y plate or the like of lithium niobate or lithium tantalate doped with MgO or Z ⁇ is also preferable.
- the off-cut angle is not particularly limited, but is preferably closer to the X-cut plate and the Y-cut plate than to the state close to the Z-cut plate, and more preferably 1 ° or more and 20 ° or less.
- the substrate 2 it is particularly preferable to use a so-called Z-cut substrate, an offcut X plate, or an offcut Y plate.
- the offcut angle is not particularly limited. Particularly preferably, the offcut angle is greater than 1 ° or less than 20 °.
- the insulating oil include commonly used insulating oils such as silicon oil and fluorine-based inert liquid.
- the magnitude of the applied voltage is preferably 3 kV to 8 kV, and the pulse frequency is preferably 1 Hz to LOOOH z.
- the periodically poled portion formed according to the present invention can be applied to any optical device having such a poled portion.
- Such an optical device includes, for example, a harmonic generation element such as a second harmonic generation element.
- the wavelength of the harmonic is preferably 330 to 160 nm.
- a laminate 1 as shown in FIG. 1 was prepared, and a periodically poled structure was formed by a voltage application method using an apparatus as shown in FIGS.
- a 0.5 mm thick z-cut substrate 2 made of Mg-doped lithium niobate single crystal and a 0.5 mm-thick 0.5 mm thick substrate 5 are prepared. Then, a comb-shaped electrode 3 was patterned on the + z surface 2a of the z-axis substrate 2, and a uniform electrode 4 was formed on the -Z surface 2b. For the 5 ° off y-cut substrate 5, uniform electrodes 6 and 7 were formed on the upper and lower surfaces 5a and 5b. The period of the domain-inverted portion was 1.8 ⁇ . The material of each electrode was Ta. The electrode thicknesses were all 1000 angstroms.
- the surface of the z Chikaradzu preparative comb electrode 3 of the substrate 2, the Si0 2 was 2000 Ongusu Toro Ichimu deposition.
- a z-cut substrate 2 was laminated on the upper side, and an off-cut substrate 5 was laminated on the lower side five times to obtain a laminate 1.
- the laminate 1 was immersed in the insulating oil 8 as shown in FIG. 2, and a pulse voltage of 6 kV and a pulse width of 10 Hz was repeatedly applied 700 times at a pulse interval of about 1 second.
- Fig. 4 shows an observation photograph of the + z plane of the wafer surface
- Fig. 5 shows a cross-sectional photograph (y plane) of the portion where the domain inversion is formed. It can be confirmed that a periodic domain-inverted structure corresponding to a period of 1.8 ⁇ ⁇ ⁇ ⁇ was uniformly obtained, indicating that this fabrication method is useful.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04748298A EP1657590B1 (en) | 2003-08-21 | 2004-08-05 | Production method for polarization inversion unit and optical device |
DE602004014940T DE602004014940D1 (de) | 2003-08-21 | 2004-08-05 | Herstellungsverfahren für eine polarisationsumkehreinheit und optische einrichtung |
US11/336,308 US7453625B2 (en) | 2003-08-21 | 2006-01-20 | Method of producing domain inversion parts and optical devices |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003297042A JP4243995B2 (ja) | 2003-08-21 | 2003-08-21 | 分極反転部の製造方法および光デバイス |
JP2003-297042 | 2003-08-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/336,308 Continuation US7453625B2 (en) | 2003-08-21 | 2006-01-20 | Method of producing domain inversion parts and optical devices |
Publications (1)
Publication Number | Publication Date |
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WO2005019921A1 true WO2005019921A1 (ja) | 2005-03-03 |
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Family Applications (1)
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PCT/JP2004/011575 WO2005019921A1 (ja) | 2003-08-21 | 2004-08-05 | 分極反転部の製造方法および光デバイス |
Country Status (6)
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US (1) | US7453625B2 (ja) |
EP (1) | EP1657590B1 (ja) |
JP (1) | JP4243995B2 (ja) |
CN (1) | CN100405204C (ja) |
DE (1) | DE602004014940D1 (ja) |
WO (1) | WO2005019921A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103257508A (zh) * | 2012-02-20 | 2013-08-21 | 北京中视中科光电技术有限公司 | 铁电晶体材料的周期极化结构及其极化方法 |
Families Citing this family (13)
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---|---|---|---|---|
JP4803546B2 (ja) * | 2006-01-04 | 2011-10-26 | プレサイスゲージ株式会社 | 波長変換導波路素子及びその製造方法 |
KR101363782B1 (ko) * | 2006-11-09 | 2014-02-14 | 엔지케이 인슐레이터 엘티디 | 디바이스의 제조 방법 |
WO2009015474A1 (en) * | 2007-07-31 | 2009-02-05 | Ye Hu | Method of ferroelectronic domain inversion and its applications |
JP2009092843A (ja) * | 2007-10-05 | 2009-04-30 | Ngk Insulators Ltd | 周期分極反転構造の製造方法 |
JP4642065B2 (ja) * | 2007-12-13 | 2011-03-02 | 日本碍子株式会社 | 周期分極反転部の製造方法 |
GB0802852D0 (en) * | 2008-02-15 | 2008-03-26 | Univ Southampton | A process for poling a ferroelectric material doped with a metal |
JP4646333B2 (ja) | 2008-03-17 | 2011-03-09 | 日本碍子株式会社 | 高調波発生装置 |
JP5300664B2 (ja) * | 2008-10-30 | 2013-09-25 | 日本碍子株式会社 | 分極反転部分の製造方法 |
JP2012078443A (ja) * | 2010-09-30 | 2012-04-19 | Dainippon Screen Mfg Co Ltd | 光学デバイス、光学デバイスの製造方法および露光装置 |
DE102010053273B4 (de) * | 2010-12-02 | 2015-03-26 | Epcos Ag | Elektroakustisches Bauelement und Verfahren zum Herstellen eines elektroakustischen Bauelements |
CN105256376B (zh) * | 2015-11-18 | 2017-12-22 | 中国科学技术大学 | 一种控制铁电单晶电致形变取向的方法 |
CN111226167B (zh) * | 2017-10-10 | 2022-04-22 | 日本碍子株式会社 | 周期极化反转结构的制造方法 |
US10274808B1 (en) * | 2018-03-14 | 2019-04-30 | Bae Systems Information And Electronic Systems Integration Inc. | Reconfigurable quasi-phase matching for field-programmable nonlinear photonics |
Citations (1)
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JP2000147584A (ja) * | 1994-08-31 | 2000-05-26 | Matsushita Electric Ind Co Ltd | 分極反転領域の製造方法ならびにそれを利用した光波長変換素子及びその製造方法 |
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JP3059080B2 (ja) | 1994-08-31 | 2000-07-04 | 松下電器産業株式会社 | 分極反転領域の製造方法ならびにそれを利用した光波長変換素子及び短波長光源 |
US5652674A (en) * | 1994-08-31 | 1997-07-29 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing domain-inverted region, optical wavelength conversion device utilizing such domain-inverted region and method for fabricating such device |
JPH08160480A (ja) * | 1994-12-09 | 1996-06-21 | Hewlett Packard Co <Hp> | 分極反転層の形成方法および波長変換素子の製造方法 |
DE69735956T2 (de) * | 1996-01-12 | 2007-05-10 | Cobolt Ab | Methode zur polarisation optischer kristalle |
JP2000066254A (ja) * | 1998-08-18 | 2000-03-03 | Matsushita Electric Ind Co Ltd | 分極反転構造の形成方法 |
JP2000066050A (ja) * | 1998-08-19 | 2000-03-03 | Ngk Insulators Ltd | 光導波路部品の製造方法及び光導波路部品 |
JP2002072267A (ja) * | 2000-08-25 | 2002-03-12 | National Institute For Materials Science | 光機能素子、該素子用単結晶基板、およびその使用方法 |
JP2002139755A (ja) * | 2000-11-01 | 2002-05-17 | Fuji Photo Film Co Ltd | 波長変換素子及びその製造方法 |
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2003
- 2003-08-21 JP JP2003297042A patent/JP4243995B2/ja not_active Expired - Lifetime
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2004
- 2004-08-05 WO PCT/JP2004/011575 patent/WO2005019921A1/ja active IP Right Grant
- 2004-08-05 EP EP04748298A patent/EP1657590B1/en active Active
- 2004-08-05 DE DE602004014940T patent/DE602004014940D1/de active Active
- 2004-08-05 CN CNB200480023906XA patent/CN100405204C/zh active Active
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2006
- 2006-01-20 US US11/336,308 patent/US7453625B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000147584A (ja) * | 1994-08-31 | 2000-05-26 | Matsushita Electric Ind Co Ltd | 分極反転領域の製造方法ならびにそれを利用した光波長変換素子及びその製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103257508A (zh) * | 2012-02-20 | 2013-08-21 | 北京中视中科光电技术有限公司 | 铁电晶体材料的周期极化结构及其极化方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1839342A (zh) | 2006-09-27 |
CN100405204C (zh) | 2008-07-23 |
US20060133767A1 (en) | 2006-06-22 |
JP2005070192A (ja) | 2005-03-17 |
US7453625B2 (en) | 2008-11-18 |
EP1657590A1 (en) | 2006-05-17 |
JP4243995B2 (ja) | 2009-03-25 |
EP1657590B1 (en) | 2008-07-09 |
DE602004014940D1 (de) | 2008-08-21 |
EP1657590A4 (en) | 2006-09-20 |
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