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1989 Fiscal Year Final Research Report Summary

OPTICAL CHARACTERISTICS INVESTIGATION ON COMPOUND SEMICONDUCTOR NATIVE DEFECTS AND RELATED MATERIALS

Research Project

Project/Area Number 63550023
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Applied materials
Research InstitutionTokyo Engineering University

Principal Investigator

MITA Yoh  Tokyo Engineering University, Professor, 工学部, 教授 (20200040)

Co-Investigator(Kenkyū-buntansha) SHIONOYA Shigeo  Tokyo Engineering University, Professor, 工学部, 教授 (20013451)
MAEDA Hajime  Tokyo Engineering University, Professor, 工学部, 教授 (00192328)
OHTA Kiyoshi  Tokyo Engineering University, Professor, 工学部, 教授 (20038376)
MARUYAMA Tohru  Tokyo Engineering University, Professor, 工学部, 教授 (90192351)
ISHIBASHI Shinichiro  Tokyo Engineering University, Professor, 工学部, 助教授 (10087223)
Project Period (FY) 1988 – 1989
KeywordsOPTICAL ABSORPTION CHARACTERISTICS / LUMINESCENCE CHARACTERISTICS / SEMI-INSULATING GaAs / INFRARED EMITTING PHOSPHORS / Er-DOPED FIBER / WATER VAPOR SENSOR / AMPLIFIED SPONTANEOUS EMISSION
Research Abstract

Investigations have been carried out for luminescence as well as optical absorption characteristics of several interesting materials including semi-insulating GaAs, infrared emitting phosphors and Er-doped silica glass fiber.
It has been previously demonstrated that the native defects in semi-insulating GaAs can be characterized by recovery characteristics as well as bleaching and absorption characteristics. These kinds of characterizing procedures are being extended for examining two dimensional, spatial distribution characteristics. This research work is being continued.
Systematic investigations on rare earth-activated, infrared emitting phosphors have been carried out. It has been shown that Er-activated phosphors having flouride lattices present fairly intense luminescence at 2.6 to 2.8um wavelength region. It has been demonstrated that these phosphors present simple and convenient detecting device for atmospheric water vapor sensor, if combined with GaAs:Si infrared light emitting diode and PbS photoconductive detector. Research activity is still continued for exploring longer wavelength emitting light materials.
Examinations have been performed on amplified spontaneous emission characteristics in Er-doped, silica glass fiber. The measurements were carried out by using Ar ion laser as excitation source. It has been fairly established that the wavelength conversion processes from higher levels are not solely nonradiative decay process as previously postulated but considerably due to intermediate radiative decay process.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Y.MITA,K.OHATA and S.SHIONOYA: "WATER VAPOR DETECTION BY MEANS OF MIDDLE INFRARED EMITTING Er^<+3>-ACTIVATED PHOSPHORS" JAPAN.J.A.P.LETTER.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoh MITA: "BLEACHING AND RECOVERY CHARACTERISTICS OF OPTICAL ABSORPTION BANDS IN SEMI-INSULATING GaAs CRYSTALS" J.Appl.Phys.64,pp.797〜801(1988). 64. 797-801 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoh MITA: "EXTRINSIC PHOTOCONDUCTIVE CHARACTERISTICS OF SEMI-INSULATING GaAs CRYSTALS" J.Appl.Phys.61,pp.5325〜5329(1987). 61. 5325-5329 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoh MITA: "DEFECT CHARACTERIZATION IN SEMI-INSULATING GaAs CRYSTALS BY MEANS OF RECOVERY CHARACTERISTICS OF BLEACHED ABSORPTION METHOD" Inst.Phys.Conf.Ser.No.97 pp69〜72(1987). 69-72 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.MITA,K.OHATA and S.SHIONOYA: "WATER VAPOR SENSOR BY USING INFRARED-EMITTING PHOSPHORS" TECHNICAL DIGEST OF 9th SENSOR SYMPOSIUM(MAY,1990 TOKYO).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoh MITA,Kiyoshi OHATA and Shigeo SHIONOYA: "WAVELENGTH CONVERSION PROCESSES IN Er^<3+>-DOPED SILICA GLASS FIBERS"

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

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Published: 1993-03-26  

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