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MAGNETO-OPTICAL MEASUREMENT METHOD AND MAGNETO-OPTICAL MEASUREMENT DEVICE UPDATE

外国特許コード F170009130
整理番号 (S2016-0279-N0)
掲載日 2017年7月20日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2016JP086855
国際公開番号 WO 2017119237
国際出願日 平成28年12月12日(2016.12.12)
国際公開日 平成29年7月13日(2017.7.13)
優先権データ
  • 特願2016-003038 (2016.1.8) JP
発明の名称 (英語) MAGNETO-OPTICAL MEASUREMENT METHOD AND MAGNETO-OPTICAL MEASUREMENT DEVICE UPDATE
発明の概要(英語) [Problem] To provide a magneto-optical measurement method and magneto-optical measurement device capable of acquiring spatial spin wave information. [Solution] A pump light irradiation means 11 irradiates pump light comprising pulse light onto a magnetic object to be measured 1. A probe light irradiation means 12 irradiates probe light onto the object to be measured 1 such that the probe light is delayed from the pump light by a prescribed delay time. A first polarization means 14 linearly polarizes the probe light at a prescribed angle before the probe light is irradiated onto the object to be measured 1. A second polarization means 15 linearly polarizes the transmitted light resulting from the passing of the probe light through the object to be measured 1 while changing the polarization angle within a range including a prescribed angle. An intensity acquisition means 16 acquires the intensity distributions of the transmitted light for each linear polarization angle of the second polarization means 15. An analysis means 17 acquires information about the response of the object to be measured 1 to the pump light on the basis of the linear polarization angles of the second polarization means 15 and the intensity distributions of the transmitted light for each linear polarization angle.
特許請求の範囲(英語) [claim1]
1. The pump optical lighting process which irradiates the pump light which consists of pulse light vis-a-vis suffering measurement ones which possess magnetism, and,
Vis-a-vis aforementioned suffering measurement ones, being able to delay just specified delay time from the aforementioned pump light, with specified angle the linearly polarized light the probe optical lighting process which irradiates the probe light which is done and,
After the aforementioned probe light passes aforementioned suffering measurement ones, while passing light, changing angle inside the range which includes the aforementioned specified angle, the linearly polarized light the polarized light process which it can point and,
The strength acquisition process which acquires the intensity distribution of aforementioned passing light in every angle which aforementioned passing light the linearly polarized light is done and,
The response information acquisition process which obtains the information of response of aforementioned suffering measurement ones with the aforementioned pump light on the basis of with the intensity distribution of aforementioned passing light every of angle and that angle which aforementioned passing light the linearly polarized light are done,
The magneto-optics measuring method which features that it possesses.
[claim2]
2. As for the aforementioned response information acquisition process, magneto-optics measuring method of the claim 1 statement which features that spatial information of the spin wave of aforementioned suffering measurement ones which were excited as information of response of aforementioned suffering measurement ones, by the aforementioned pump light is obtained.
[claim3]
3. The aforementioned strength acquisition process, with vertical plane surface, acquires the intensity distribution of aforementioned passing light vis-a-vis the optical axis of aforementioned passing light,
The aforementioned response information acquisition process the description above to which with the angle of rotation I of the linearly polarized light of the aforementioned probe light by the Faraday effect which occurs with aforementioned suffering measurement ones specified position with respect to the aforementioned plane surface (x, every y), each angle I which aforementioned passing light the polarized light is done, relationship with strength I of aforementioned passing light which corresponds to each angle I, by the fitting doing, strength I [0] of aforementioned passing light, due to the aforementioned pump light with secondary function calculated, from distribution with respect to the aforementioned plane surface in this angle of rotation I , by the aforementioned pump light was excitedObtaining the spatial information of the spin wave of suffering measurement ones
Magneto-optics measuring method of the claim 1 statement which is made feature.
[claim4]
4. The aforementioned strength acquisition process, with vertical plane surface, acquires the intensity distribution of aforementioned passing light vis-a-vis the optical axis of aforementioned passing light,
As for the aforementioned response information acquisition process, specified position with respect to the aforementioned plane surface (x, every y), each angle I which aforementioned passing light the polarized light is done [i] (as for i=1-N and N when changing the angle which aforementioned passing light the polarized light is done frequency of all measurements) with, each angle I [the relationship with strength I (i) of aforementioned passing light which corresponds to i],
Obtaining the spatial information of the spin wave of aforementioned suffering measurement ones which calculated with the angle of rotation I of the linearly polarized light of the aforementioned probe light by the Faraday effect which occurs with aforementioned suffering measurement ones by the fitting doing, strength I [0] of aforementioned passing light, due to the aforementioned pump light with relational expression were excited from distribution with respect to the aforementioned plane surface in this angle of rotation I , by the aforementioned pump light
Magneto-optics measuring method of the claim 1 statement which is made feature.
[claim5]
5. While changing the aforementioned delay time, the repetition process which repeats each process and,
From information of response of aforementioned suffering measurement ones which are obtained with the aforementioned response information acquisition process vis-a-vis each delay time, information acquisition process between the space-time which the information between space-time of response of aforementioned suffering measurement ones obtains,
In 1 sections magneto-optics measuring method of statement the claim either 1 which features that it possesses or 4.
[claim6]
6. While changing the aforementioned delay time, the repetition process which repeats each process and,
From spatial information of aforementioned suffering measurement ones which are obtained with the aforementioned response information acquisition process vis-a-vis each delay time, information acquisition process between the space-time which the information between space-time of response of aforementioned suffering measurement ones obtains possessing,
Obtaining the spatial information of the spin wave of aforementioned suffering measurement ones by all positions (x, y) with being in common to the fitting, utilizing the 3x3 queue where the aforementioned response information acquisition process calculates the 3x3 queue of the right-hand side on the aforementioned relational expression vis-a-vis each delay time, 1 times is obtained,
Magneto-optics measuring method of the claim 4 statement which is made feature.
[claim7]
7. The claim magneto-optics measuring method of 5 which features that opposite spatial information of aforementioned suffering measurement ones is obtained by information between space-time of response of aforementioned suffering measurement ones Fourier converting, or 6 statements.
[claim8]
8. In 1 sections magneto-optics measuring method of statement the claim either 5 which features that it makes the same each angle which aforementioned passing light the linearly polarized light is done, vis-a-vis each delay time of the aforementioned repetition process with the aforementioned polarized light process or 7.
[claim9]
9. In 1 sections magneto-optics measuring method of statement the claim either 5 which features that dispersed relationship of the spin wave of aforementioned suffering measurement ones which were excited by the information between space-time of response of aforementioned suffering measurement ones Fourier converting, as opposite spatial information of aforementioned suffering measurement ones, by the aforementioned pump light is obtained or 8.
[claim10]
10. As for the aforementioned pump light and the aforementioned probe light, in 1 sections magneto-optics measuring method of statement picosecond or the claim either 1 which features that it consists of the femto- second laser or 9.
[claim11]
11. As for the aforementioned pump light, in 1 sections magneto-optics measuring method of statement the claim either 1 which features that spot diameter with vertical section is 10 .micro.m or less vis-a-vis the traveling direction or 10.
[claim12]
12. As for the aforementioned probe light, in 1 sections magneto-optics measuring method of statement the claim either 1 which features that spot diameter with vertical section is 100 .micro.m-2mm vis-a-vis the traveling direction or 11.
[claim13]
13. With the aforementioned polarized light process, as for the range of the angle which aforementioned passing light the linearly polarized light is done, in 1 sections magneto-optics measuring method of statement the aforementioned specified angle - the claim either 1 which features that it is the range 10.deg.- aforementioned specified angle +10.deg. or 12.
[claim14]
14. As for the aforementioned strength acquisition process, aforementioned passing light absorbing light, in 1 sections magneto-optics measuring method of statement the claim either 1 which features that you acquire the intensity distribution picture of aforementioned passing light or 13.
[claim15]
15. The pump light which consists of pulse light vis-a-vis suffering measurement ones which possess magnetism, is irradiated,
Probe light is irradiated vis-a-vis aforementioned suffering measurement ones,
After the aforementioned probe light passes aforementioned suffering measurement ones, actual spatial information of response of aforementioned suffering measurement ones with the aforementioned pump light by measuring passing light, is acquired,
Obtaining the dispersed relationship of response of aforementioned suffering measurement ones the aforementioned actual spatial information by Fourier converting in opposite spatial information,
The magneto-optics measuring method which is made feature.
[claim16]
16. The aforementioned probe light the linearly polarized light to be done with specified angle, being able to delay just specified delay time from the aforementioned pump light vis-a-vis aforementioned suffering measurement ones, be irradiated,
While aforementioned passing light, changing angle inside the range which includes aforementioned specified angle, the linearly polarized light being able to point, you acquire the intensity distribution of aforementioned passing light in every angle of that linearly polarized light,
The aforementioned actual spatial information is acquired on the basis of with the intensity distribution of aforementioned passing light every of angle and that angle which aforementioned passing light the linearly polarized light are done,
While changing the aforementioned delay time, it irradiates the aforementioned probe light, acquiring the intensity distribution of aforementioned passing light every of angle of the linearly polarized light of aforementioned passing light vis-a-vis each delay time, it acquires the aforementioned actual spatial information,
Obtaining the relationship of the aforementioned dispersion by Fourier converting the aforementioned actual spatial information which can vis-a-vis each delay time
Magneto-optics measuring method of the claim 15 statement which is made feature.
[claim17]
17. The pump optical lighting expedient which the pump light which consists of pulse light vis-a-vis suffering measurement ones which possess magnetism, lighting possibly is provided and,
Vis-a-vis aforementioned suffering measurement ones, being able to delay just specified delay time from the aforementioned pump light, the probe optical lighting expedient which probe light lighting possibly is provided and,
Before the irradiating to aforementioned suffering measurement ones, the 1st polarized light expedient which the aforementioned probe light with specified angle the linearly polarized light possibly is provided and,
After the aforementioned probe light passes aforementioned suffering measurement ones, while passing light, changing angle inside the range which includes the aforementioned specified angle, the 2nd polarized light expedient which the linearly polarized light possibly is provided and,
With the aforementioned 2nd polarized light expedient in every angle which the linearly polarized light is done, the strength acquisition expedient which intensity distribution of aforementioned passing light acquisition possibly is provided and,
The analytical expedient which information of response of aforementioned suffering measurement ones with the aforementioned pump light on the basis of with the intensity distribution of aforementioned passing light which in every angle and that angle of the linearly polarized light due to the aforementioned 2nd polarized light expedient is acquired with the aforementioned strength acquisition expedient, acquisition possibly is provided,
The magneto-optics measurement equipment which features that it possesses.
[claim18]
18. As for the aforementioned analytical expedient, spatial information of the spin wave of aforementioned suffering measurement ones which were excited as information of response of aforementioned suffering measurement ones, by the aforementioned pump light acquisition the magneto-optics measurement equipment of the claim 17 statement which features that it is possible.
[claim19]
19. Vis-a-vis the optical axis of aforementioned passing light with vertical plane surface, intensity distribution of aforementioned passing light acquisition possibly providing the aforementioned strength acquisition expedient,
The aforementioned analytical expedient the aforementioned suffering measurement to which with the angle of rotation I of the linearly polarized light of the aforementioned probe light by the Faraday effect which occurs with aforementioned suffering measurement ones specified position with respect to the aforementioned plane surface (x, every y), each angle I which aforementioned passing light the polarized light is done, relationship with strength I of aforementioned passing light which corresponds to each angle I, by the fitting doing, strength I [0] of aforementioned passing light, due to the aforementioned pump light with secondary function calculated, from distribution with respect to the aforementioned plane surface in this angle of rotation I , by the aforementioned pump light was excitedSpatial information of the spin wave of the thing acquisition being possible
The magneto-optics measurement equipment of the claim 17 statement which is made feature.
[claim20]
20. Vis-a-vis the optical axis of aforementioned passing light with vertical plane surface, intensity distribution of aforementioned passing light acquisition possibly providing the aforementioned strength acquisition expedient,
As for the aforementioned analytical expedient, specified position with respect to the aforementioned plane surface (x, every y), each angle I which aforementioned passing light the polarized light is done [i] (as for i=1-N and N when changing the angle which aforementioned passing light the polarized light is done frequency of all measurements) with, each angle I [the relationship with strength I (i) of aforementioned passing light which corresponds to i],
Spatial information of the spin wave of aforementioned suffering measurement ones which calculated with the angle of rotation I of the linearly polarized light of the aforementioned probe light by the Faraday effect which occurs with aforementioned suffering measurement ones by the fitting doing, strength I [0] of aforementioned passing light, due to the aforementioned pump light with relational expression were excited from distribution with respect to the aforementioned plane surface in this angle of rotation I , by the aforementioned pump light acquisition being possible
The magneto-optics measurement equipment of the claim 17 statement which is made feature.
[claim21]
21. Possessing the delay time modification expedient which the aforementioned delay time change possibly is provided,
The aforementioned strength acquisition expedient, every each delay time, and in every angle which the linearly polarized light is done, intensity distribution of aforementioned passing light is acquisition possible with the aforementioned 2nd polarized light expedient,
As for the aforementioned analytical expedient, acquiring the information of response of aforementioned suffering measurement ones vis-a-vis each delay time, information between space-time of response of aforementioned suffering measurement ones acquisition being possible
In 1 sections the magneto-optics measurement equipment of statement the claim either 17 which is made feature or 20.
[claim22]
22. Possessing the delay time modification expedient which the aforementioned delay time change possibly is provided,
The aforementioned strength acquisition expedient, every each delay time, and in every angle which the linearly polarized light is done, intensity distribution of aforementioned passing light is acquisition possible with the aforementioned 2nd polarized light expedient,
The aforementioned analytical expedient calculates the 3x3 queue of the right-hand side on the aforementioned relational expression vis-a-vis each delay time, 1 times acquires the spatial information of the spin wave of aforementioned suffering measurement ones by all positions (x, y) with being in common to the fitting, utilizing the 3x3 queue which is obtained, from spatial information of the spin wave of aforementioned suffering measurement ones of that each delay time, information between space-time of response of aforementioned suffering measurement ones acquisition being possible
The magneto-optics measurement equipment of the claim 20 statement which is made feature.
[claim23]
23. As for the aforementioned analytical expedient, by information between space-time of response of aforementioned suffering measurement ones Fourier converting, opposite spatial information of aforementioned suffering measurement ones acquisition the claim magneto-optics measuring method of 21 which features that it is possible or 22 statements.
[claim24]
24. As for the aforementioned 2nd modification expedient, in 1 sections the magneto-optics measurement equipment of statement each angle which aforementioned passing light the linearly polarized light is done, way is made the same, vis-a-vis each delay time the claim either 21 which features that it is constituted or 23.
[claim25]
25. As for the aforementioned analytical expedient, in 1 sections the magneto-optics measurement equipment of statement dispersed relationship of the spin wave of aforementioned suffering measurement ones which were excited by the information between space-time of response of aforementioned suffering measurement ones Fourier converting, as opposite spatial information of aforementioned suffering measurement ones, by the aforementioned pump light the claim either 21 which features that it is acquisition possible or 24.
[claim26]
26. As for the aforementioned strength acquisition expedient, aforementioned passing light absorbing light, in 1 sections the magneto-optics measurement equipment of statement the intensity distribution picture of aforementioned passing light the claim either 17 which features that acquisition possibly it is provided or 25.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • TOHOKU UNIVERSITY
  • 発明者(英語)
  • HASHIMOTO YUSUKE
  • SAITOH EIJI
国際特許分類(IPC)
指定国 (WO2017119237)
National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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