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2001 Fiscal Year Final Research Report Summary

Terahertz Radiation from High-Tc Superconductors and Related Materials

Research Project

Project/Area Number 11231202
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionOSAKA UNIVERSITY

Principal Investigator

HANGYO Masanori  Research Center for Superconductor Photonics, Osaka University, Professor, 超伝導フォトニクス研究センター, 教授 (10144429)

Project Period (FY) 1999 – 2002
Keywordsterahertz wave / high-Tc superconductor / ultrashort optical pulse / supercurrent mapping / terahertz time domain spectroscopy / terahertz imaging / semiconductor surface / photonic crystal
Research Abstract

The purposes of the project are 1. to clarify the whole properties of terahertz (THz) radiation from high-Tc superconductors and 2. to apply THz waves to characterization of various materials including high-Tc superconductors. The obtained results are
1. High-Tc superconductor YBCO THz emitting devices with various types of antenna structures have been fabricated and their emission properties are investigated. It is found that the log-periodic type device is most efficient and the intensity reached 10 μW with 100 mW excitation intensity.
2. Apparatus for visualizing the supercurrent flow using THz radiation is constructed and applied to investigate the supercurrent distribution under various conditions.
3. THz radiation from semiconductor surfaces and polymers is measured. It is found that the waveform radiated from semi-insulating InP chenges its sign at 〜 140 K and the intensity is strongly enhanced at 〜 500 K for semi-insulating GaAs. The results are explained by the drift-diffusion model for photoexcited carriers.
4. Various types of THz time domain spectroscopic (THz-TDS) systems are constructed and applied to characterizing various materials.
5. By applying THz-TDS system to characterizing photonic crystals, nearly complete agreement between experiment and theory is obtained for 2-dimensional dielectric array photonic crystal.
6. A THz imaging system for general use is connstructed and applied to imaging metallic objects and photocarriers in semiconductors.

  • Research Products

    (86 results)

All Other

All Publications (86 results)

  • [Publications] T.Kondo: "THz radiation using 1.55μm femtosecond laser pulses"IEEE 7th Int.Conf.on Terahertz Electronics Proc.. 161-164 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kiwa: "THz emission properties of amorphous GaAs photoswitches fabricated on YBa_2Cu_3O_<7-δ> thin films"IEEE 7th Int.Conf.on Terahertz Electronics Proc.. 165-168 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nashima: "Terahertz radiation from high-T_c superconductive log-periodic antennas"IEEE 7th Int.Conf.on Terahertz Electronics Proc.. 173-176 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Saijo: "THz radiation from superconducting Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> films by femtosecond laser excitation"IEEE 7th Int.Conf.on Terahertz Electronics Proc.. 246-248 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Kitoh: "Time domain THz spectroscopy of BaTiO_3 thin films"IEEE 7th Int.Conf.on Terahertz Electronics Proc.. 268-271 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yamashita: "Visualization of supercurrent distribution in high-T_c superconductor YBCO thin films by THz radiation mapping"IEEE 7th Int.Conf.on Terahertz Electronics Proc.. 276-279 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] O.Morikawa: "Vector imaging of supercurrent flow in YBa_2Cu_3O_<7-δ> thin films using terahertz radiation"Appl.Phys.Lett.. 75. 3387-3389 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 萩行正憲: "光伝導スイッチによるTHz波の発生"応用物理. 68. 1390-1391 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Shikii: "Observation of supercurrent distribution in YBa_2Cu_3O_<7-δ> thin films using THz radiation excited with femtosecond laser pulses"Appl.Phys.Lett.. 74. 1317-1319 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hangyo: "Ion-beam milling of YBCO thin films and their charasterization by timeresolved pump-probe method"IEEE Trans.on Appl.Supercond.. 9. 1952-1955 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hangyo: "Observation of supercurrent distribution in YBCO thin film devices by photoexcited THz radiation"IEEE Trans.on Appl.Supercond.. 9. 3038-3041 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Tonouchi: "Detection and storage of femtosecond laser pulse signals by optical magnetic-flux-generation in a YBCO thin film loop"IEEE Trans.on Appl.Supercond.. 9. 4467-4470 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nashima: "Femtosecond optical pulse response of Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> thin films"Advances in Superconductivity. XI. 93-97 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nashima: "Ion milling of YBa_2Cu_3O_<7-δ> thin films and their characterization"Advances in Superconductivity. XI. 129-132 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yamashita: "Evaluation of supercurrent distribution by terahertz radiation mapping"Advances in Superconductivity. XI. 189-192 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kondo: "A novel two-dimensional mapping system for supercurrent distribution using femtosecond laser pulses"Advances in Superconductivity. XI. 1285-1289 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ch.Ludwig: "Electrodynamic c-axis properties of YBa_2Cu_3O_<7-δ> films in the THz frequency regime"Phys.Status Solidi. 213. 405-412 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] O.Morikawa: "Sub-THz spectroscopic system using a multimode laser diode and photoconductive antenna"Appl.Phys.Lett.. 75. 3772-3774 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] O.Morikawa: "A cross-correlation spectroscopy in sub-terahertz region using an incoherent light source"Appl.Phys.Lett.. 76. 1519-1521 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 萩行正憲: "レーザー・テラヘルツ波工学の開拓"生産と技術. 52. 39-42 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 萩行正憲: "超伝導体からのテラヘルツ光発生"O plus E. 22. 51-61 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Tonouchi: "Terahertz radiation imaging of supercurrent distribution in vortex-penetrated YBa_2Cu_3O_<7-δ> thin film strips"J.Appl.Phys.. 87. 7366-7375 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Kida: "Low-energy charge dynamics in La_<0.7>Ca_<0.3>MnO_3:THz time-domain spectroscopic studies"Phys.Rev.B. 62. R11965-R11968 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nashima: "Two components in femtosecond optical response of Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> thin films in superconducting state"Jpn.J.Appl.Phys.. 39. L663-L666 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Tonouchi: "Vortex penetration in YBCO thin film strips observed by THz radiation imaging"Physica B. 284-288. 853-854 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Tonouchi: "Optical magnetic flux generation in YBCO thin film loops using femtosecond laser pulses"Physica B. 284-288. 1888-1889 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kiwa: "Optical response in amorphous GaAs thin films prepared by pulsed laser deposition"Jpn.J.Appl.Phys.. 39. 6304-6308 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Wald: "Comparison of the electromagnetic pulse emission from YBa_2Cu_3O_<7-δ> and Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> excited by femtosecond laser pulses"Physica C. 341-348. 1899-1900 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Moto: "Terahertz radiation imaging of vortex penetration into YBCO thin films with and without ordered arrays of antidots"IEICE Trans.Electron.. E84-C. 67-73 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kondo: "Terahertz radiation from superconducting YBa_2Cu_3O_<7-δ> thin films with 1.55μm excitation"Jpn.J.Appl.Phys.. 40. 640-643 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yamashita: "Visualization of supercurrent distribution by THz radiation mapping"Physica B. 248-288. 2067-2068 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] O.Morikawa: "Vector map imaging of supercurrent distribution in high-Tc superconductive thin films"Physica B. 248-288. 2069-2070 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nashima: "Temperature dependence of optical and electronic properties of moderately doped silicon at terahertz frequencies"J.Appl.Phys.. 90. 837-842 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hangyo: "Magnetic field and temperature dependence of terahertz radiation from InAs surfaces excited by femtosecond laser pulses"J.Appl.Phys.. 90. 3409-3412 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Quema: "Terahertz-time domain spectroscopic measurement of moderately-doped silicon using InAs emitter under magnetic field"Jpn.J.Appl.Phys.. 40. 867-872 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Migita: "Pump-power dependence of THz radiation from InAs surfaces under magnetic fields excited by ultrashort laser pulses"Appl.Phys.Lett.. 79. 3437-3439 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Nagashima: "Measurement of complex optical constants of a highly doped Si wafer using terahertz ellipsometry"Appl.Phys.Lett.. 79. 3917-3919 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Kitoh: "Terahertz beam profiler using optical transmission modulation in silicon"Jpn.J.Appl.Phys.. 40. L1113-L1115 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nashima: "Measurement of optical properties of highly doped silicon by terahertz time domain reflection spectroscopy"Appl.Phys.Lett.. 79. 3923-3925 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Nakajima: "Temperature dependence of THz radiation from semi-insulating InP surface"J.Lumi.. 94-95. 627-630 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Kida: "Low-energy charge dynamics of La_<0.7>Ca_<0.3>MnO_3 thin film"J.Mag.Mag.Mat.. 226-230. 818-820 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 萩行正憲: "レーザー・テラヘルツ波工学とその応用"高温学会誌. 27. 131-143 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yamashita: "Supercurrent distribution in YBCO strip lines under bias current and magnetic fields observed by THz radiation imaging"Physica C. 355. 217-224 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Kondo et al.: "THz radiation using 1.55μm femtosecond laser pulses"IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 161-164 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kiwa et al.: "THz emission properties of amorphous GaAs photoswitches fabricated on YBa_2Cu_3O_<7-δ> thin films"IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 165-168 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nashima et al.: "Terahertz radiation from high-T_c superconductive log-periodic antennas"IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 173-176 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Saijo et al.: "THz radiation from superconducting Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> films by femtosecond laser excitation"IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 246-248 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Kitoh et al.: "Time domain THz spectroscopy of BaTiO_3 thin films"IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 268-271 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Yamashita et al.: "Visualization of supercurrent distribution in high-T_c superconductor YBCO thin films by THz radiation mapping"IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 276-279 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] O. Morikawa et al.: "Vector imaging of supercurrent flow in YBa_2Cu_3O_<7-d> thin films using terahertz radiation"Appl. Phys. Lett.. 75. 3387-3389 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hangyo: "THz radiation from photoconductive switches"Oyo Butsuri. 68. 1390-1391 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Shikii et al.: "Observation of supercurrent distribution in YBa_2Cu_3O_<7-d> thin films using THz radiation excited with femtosecond laser pulses"Appl. Phys. Lett.. 74. 1317-1319 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hangyo et al.: "Ion-beam milling of YBCO thin films and their charasterization by time-resolved pump-probe method"IEEE Trans. on Appl. Supercond.. 9. 1952-1955 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hangyo et al.: "Observation of supercurrent distribution in YBCO thin film devices by photoexcited THz radiation"IEEE Trans. on Appl. Supercond.. 9. 3038-3041 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Tonouchi et al.: "Detection and storage of femtosecond laser pulse signals by optical magnetic-flux-generation in a YBCO thin film loop"IEEE Trans. on Appl. Supercond.. 9. 4467-4470 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nashima et al.: "Femtosecond optical pulse response of Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> thin films"Advances in Superconductivity. XI. 93-97 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nashima et al.: "Ion milling of YBa_2Cu_3O_<7-δ> thin films and their characterization"Advances in Superconductivity. XI. 129-132 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Yamashita et al: "Evaluation of supercurrent distribution by terahertz radiation mapping"Advances in Superconductivity. XI. 189-192 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kondo et al.: "A novel two-dimensional mapping system for supercurrent distribution using femtosecond laser pulses"Advances in Superconductivity. XI. 1285-1289 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ch. Ludwig et al.: "Electrodynamic c-axis properties of YBa_2Cu_3O_<7-δ> films in the THz frequency regime"Phys. Status Solidi. 213. 405-412 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] O. Morikawa et al.: "Sub-THz spectroscopic system using a multimode laser diode and photoconductive antenna"Appl. Phys. Lett.. 75. 3772-3774 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] O. Morikawa et al.: "A cross-correlation spectroscopy in sub-terahertz region using an incoherent light source"Appl. Phys. Lett.. 76. 1519-1521 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hangyo: "Development of laser terahertz technology"Seisan to Gijutsu. 52. 39-42 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hangyo: "THz radiation from high-Tc superconductors"O plus E. 22. 51-61 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Tonouchi et al.: "Terahertz radiation imaging of supercurrent distribution in vortex-penetrated YBa_2Cu_3O_<7-δ> thin film strips"J. Appl. Phys.. 87. 7366-7375 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N. Kida et al.: "Low-energy charge dynamics in La_<0.7>Ca_<0.3>MnO_3 : THz time-domain spectroscopic studies"Phys. Rev. B. 62. R11965-R11968 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nashima et al.: "Two components in femtosecond optical response of Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> thin films in superconducting state"Jpn. J. Appl. Phys.. 39. L663-L666 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Tonouchi et al.: "Vortex penetration in YBCO thin film strips observed by THz radiation imaging"Physica B. 284-288. 853-854 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Tonouchi et al.: "Optical magnetic flux generation in YBCO thin film loops using femtosecond laser pulses"Physica B. 284-288. 1888-1889 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kiwa et al.: "Optical response in amorphous GaAs thin films prepared by pulsed laser deposition"Jpn. J. Appl. Phys.. 39. 6304-6308 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Wald et al.: "Comparison of the electromagnetic pulse emission from YBa_2Cu_3O_<7-δ> and Y_<0.7>Pr_<0.3>Ba_2Cu_3O_<7-δ> excited by femtosecond laser pulses"Physica C. 341-348. 1899-1900 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Yamashita et al.: "Visualization of supercurrent distribution by THz radiation mapping"Physica B. 248-288. 2067-2068 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] O. Morikawa et al.: "Vector map imaging of supercurrent distribution in high-Tc superconductive thin films"Physica B. 248-288. 2069-2070 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A. Moto et al.: "Terahertz radiation imaging of vortex penetration into YBCO thin films with and without ordered arrays of antidots"IEICE Trans. Electron.. E84-C. 67-73 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kondo et al.: "Terahertz radiation from superconducting YBa_2Cu_3O_<7-δ> thin films with 1.55μm excitation"Jpn. J. Appl. Phys.. 40. 640-643 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nashima et al.: "Temperature dependence of optical and electronic properties of moderately doped silicon at terahertz frequencies"J. Appl. Phys.. 90. 837-842 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hangyo et al.: "Magnetic field and temperature dependence of terahertz radiation from InAs surfaces excited by femtosecond laser pulses"J. Appl. Phys.. 90. 3409-3412 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A. Quema et al.: "Terahertz-time domain spectroscopic measurement of moderately-doped silicon using InAs emitter under magnetic field"Jpn. J. Appl. Phys.. 40. 867-872 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Migita et al.: "Pump-power dependence of THz radiation from InAs surfaces under magnetic fields excited by ultrashort laser pulses"Appl. Phys. Lett.. 79. 3437-3439 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Nagashima et al.: "Measurement of complex optical constants of a highly doped Si wafer using terahertz ellipsometry"Appl. Phys. Lett.. 79. 3917-3919 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Kitoh et al.: "Terahertz beam profiler using optical transmission modulation in silicon"Jpn. J. Appl. Phys.. 40. L1113-L1115 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nashima et al.: "Measurement of optical properties of highly doped silicon by terahertz time domain reflection spectroscopy"Appl. Phys. Lett.. 79. 3923-3925 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Nakajima et al.: "Temperature dependence of THz radiation from semi-insulating InP surface"J. Lumi.. 94-95. 627-630 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N. Kida et al.: "Low-energy charge dynamics of La_<0.7>Ca_<0.3>MnO_3 thin film"J. Mag. Mag. Mat.. 226-230. 818-820 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hangyo: "Laser terahertz wave technology and its applications"Kouongakkaishi. 27. 131-143 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Yamashita et al.: "Supercurrent distribution in YBCO strip lines under bias current and magnetic fields observed by THz radiation imaging"Physica C. 355. 217-224 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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