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2006 Fiscal Year Final Research Report Summary

New Functional Optical Cross Connect using Quantum Dots Structure

Research Project

Project/Area Number 17360169
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Electron device/Electronic equipment
Research InstitutionSophia University

Principal Investigator

SHINOMURA Kazuhiko  Sophia University, Professor, 理工学部, 教授 (90222041)

Co-Investigator(Kenkyū-buntansha) YOSHIDA Junji  Adavanced Telecommunications Reseach Institute International, Senior Researcher, 波動工学研究所非線形科学研究室, 主任研究員 (80393594)
Project Period (FY) 2005 – 2006
KeywordsLow Dimensional Quantum Well / InAs Quantum Dots / Wavelength Switching / Self-Organized / MOVPE / Selective Area Growth / InP Substrate / Refractive Index Change
Research Abstract

In WDM networks, key components are the wavelength multi-/demultiplexers, which combine/separate wavelength channels. Various kind of demultiplexing principles have been proposed and already commercially available, such as arrayed-waveguide gratings (AWG). In the latest paper, we have proposed a novel wavelength demultiplexer using a GaInAs/InP multiple quantum well (MQW) arrayed waveguide in which refractive index varies linearly across the array. The conventional AWGs are designed so that phase differences between adjacent waveguides are obtained by gradually varying waveguide length. In the proposed design, however, phase differences between adjacent waveguides are achieved by varying the waveguide thickness which is the refractive indices of the waveguides. Therefore, it is possible to be realized a straight waveguide type wavelength demultiplexer. Furthermore, the device could be applied to wavelength switching since the refractive indices of the waveguides in the array can be con … More trolled dynamically by QCSE or TO effect. On the other hand, self-assembled semiconductor quantum dots (QDs) grown via the Stranski-Krastanov (S-K) growth mode have attracted much attention for the monolithic integration of QD devices. To realize wide wavelength range QDs in a single integrated optical device, a technique to control self-assembled QDs size in the same plane is important. In this project, we have studied the wavelength switch with refractive index varied arrayed waveguide using quantum dots in the waveguide core. In the wavelength switch using MQW structure, we have successfully demonstrated the wavelength switching in the straight arrayed waveguide with linearly varying refractive index distribution by changing the refractive index using thermo-optic effect. We have obtained the wavelength demultiplexing and its changing of the output ports by refractive index change in the waveguide. In the study of quantum dots, we have obtained the 140 nm wavelength emission range from the self-assembled InAs QDs array waveguides on the InP substrate by employing the selective MOVPE growth using asymmetrical mask and the double-cap procedure of QDs. These results are very effective for the realization of optical cross connects in the optical communication system. Less

  • Research Products

    (12 results)

All 2007 2006 2005

All Journal Article (12 results)

  • [Journal Article] Simple estimation of strain distribution in narrow-stripe waveguide array fabricated by selective MOVPE2007

    • Author(s)
      T.Yoshioka, Y.Kawakita, A.Kawai, T.Okawa, K.Shimomura
    • Journal Title

      J. Crystal Growth 298

      Pages: 676-681

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Controlling emission wavelength of double-capped InAs quantum dots by selective MOVPE employing stripe mask array2007

    • Author(s)
      Y.Yamauchi, S.Okamoto, T.Okawa, Y.Kawakita, J.Yoshida, K.Shimomura
    • Journal Title

      J. Crystal Growth 298

      Pages: 578-581

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Growth temperature and InAs supply dependences of InAs quantum dots on InP (001) substrate2007

    • Author(s)
      T.Okawa, Y.Yamauchi, J.Yamamoto, J Yoshida, K.Shimomura
    • Journal Title

      J. Crystal Growth 298

      Pages: 562-566

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Simple estimation of strain distribution in narrow-stripe waveguide array fabricated by selective MOVPE2007

    • Author(s)
      T.Yoshioka, Y.Kawakita, A.Kawai, T., Okawa, K.Shimomura
    • Journal Title

      J.Crystal Growth vol.298

      Pages: 676-681

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Controlling emission wavelength of double-capped InAs quantum dots by selective MOVPE employing stripe mask array2007

    • Author(s)
      Y.Yamauchi, S.Okamoto, T.Okawa, Y.Kawakita, J.Yoshida, K.Shimomura
    • Journal Title

      J.Crystal Growth vol.298

      Pages: 578-581

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Growth temperature and InAs supply dependences of InAs quantum dots on InP (0 0 1) substrate2007

    • Author(s)
      T.Okawa, Y.Yamauchi, J.Yamamoto, J.Yoshida, K.Shimomura
    • Journal Title

      J.Crystal Growth vol.298

      Pages: 562-566

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Improvements of crosstalk in variable-refractive index waveguide array demultiolexer2006

    • Author(s)
      T.Yoshioka, Y.Kawakita, D.Machida, K.Shimomura
    • Journal Title

      Conference on Lasers and Electro-Optics (CLEO 2006)

      Pages: CWK4

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Controlling emission wavelength of double-capped InAs quantum dots by selective MOVPE employing stripe mask array2006

    • Author(s)
      Y.Yamauchi, S.Okamoto, T.Okawa, Y.Kawakita, J.Yoshida, K.Shimomura
    • Journal Title

      13th International Conference on Metal Organic Vapor Phase Epitaxy

      Pages: Tu-90

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Improvements of crosstalk in variable-refractive index waveguide array demultiplexer2006

    • Author(s)
      T.Yoshioka, Y.Kawakita, D.Machida, K.Shimomura
    • Journal Title

      Conference on Lasers and Electro-Optics (CLEO 2006) (Long Beach, California, USA) CWK4

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Controlling emission wavelength of double-capped InAs quantum dots by selective MOVPE employing stripe mask array2006

    • Author(s)
      Y.Yamauchi, S.Okamoto, T.Okawa, Y.Kawakita, J.Yoshida, K.Shimomura
    • Journal Title

      13th International Conference on Metal Organic Vapor Phase Epitaxy (Miyazaki, Japan) Tu-P.90

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Wavelength demultiplexing and optical deflector in variable refractive-index waveguide array based on selectively grown GaInAs/InP MQW structure2005

    • Author(s)
      Y.Kawakita, S.Shimotaya, D.Machida, K.Shimomura
    • Journal Title

      IEICE Trans. Electron E88-C

      Pages: 1013-1019

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Wavelength demultiplexing and optical deflector in variable refractive-index waveguide array based on selectively grown GaInAs/InP MQW structure,2005

    • Author(s)
      Y.Kawakita, S.Shimotaya, D.Machida, K.Shimomura
    • Journal Title

      IEICE Trans.Electron. vol.E88-C, no.5

      Pages: 1013-1019

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

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Published: 2008-05-27  

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