Space-time resolved spectroscopy of high-density electron-hole systems in nanomaterials and their optical functionalities

2012 Fiscal Year Final Research Report

• Project Area: Optical science of dynamically correlated electrons in semiconductors
• Project/Area Number: 20104006
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Kyoto University
• Principal Investigator: KANEMITSU Yoshihiko 京都大学, 化学研究所, 教授 (30185954)
• Co-Investigator(Kenkyū-buntansha): TAYAGAKI Takeshi 京都大学, 化学研究所, 准教授 (80422327) ; YAMAMOTO Shinpei 京都大学, 物質-細胞統合システム拠点, 助教 (20362395) ; IHARA Toshiyuki 京都大学, 化学研究所, 助教 (10619860)
• Project Period (FY): 2008 – 2012
• Keywords: ナノ材料 / 光物性 / 半導体材料 / 励起子 / キャリアダイナミクス / オージェ再結合 / マルチエキシトン

Research Abstract

We have studied the optical properties of semiconductor nanomaterials such as carbon nanotubes, nanoparticles, quantum wires and wide-gap oxides. Strong Coulomb interactions between excitons confined in these nanomaterials cause fast Auger recombination and multiple exciton generation. Unique quantized recombination processes of multiple excitons are clarified using space-time resolved optical spectroscopy.

Research Products

• [Journal Article] Breakdown of the k-conservation rule in quantized Auger recombination in Si_<1-x>Ge_x nanocrystals (2012)
  • Author(s): K. Ueda, T. Tayagaki, M. Fukuda, M. Fujii, and Y. Kanemitsu
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 155316/1-155316/5
  • DOI: DOI:10.1103/PhysRevB.86.155316
  • URL: http://hdl.handle.net/2433/173933
  • Peer Reviewed
• [Journal Article] Dynamics of exciton-hole recombination in hole-doped single-walled carbon nanotubes (2012)
  • Author(s): T. Nishihara, Y. Yamada, and Y. Kanemitsu
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 075449/1-075449/5
  • DOI: DOI:10.1103/PhysRevB.86.075449
  • URL: http://hdl.handle.net/2433/159453
  • Peer Reviewed
• [Journal Article] Observation of high Rydberg states of one-dimensional excitons in GaAs quantum wires by magnetophotoluminescence excitation spectroscopy (2012)
  • Author(s): M. Okano, Y. Kanemitsu, S. Chen, T. Mochizuki, M. Yoshita, H. Akiyama, L. N. Pfeiffer, and K. W. West
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 085312/1-085312/5
  • DOI: DOI:10.1103/PhysRevB.86.085312
  • URL: http://hdl.handle.net/2433/159454
  • Peer Reviewed
• [Journal Article] Excitons in semiconducting carbon nanotubes: Diameter-dependent photoluminescence spectra (2011)
  • Author(s): Y. Kanemitsu
  • Journal Title: Phys. Chem. Chem. Phys Volume: 13 Pages: 14879-14888
  • DOI: DOI:10.1039/c1cp21235d
  • Peer Reviewed
• [Journal Article] Quantized Auger Recombination of Biexcitons in CdSe Nanorods Studied by Time-Resolved Photoluminescence and Transient-Absorption Spectroscopy (2011)
  • Author(s): S. Taguchi, M. Saruyama, T. Teranishi, and Y. Kanemitsu
  • Journal Title: Phys. Rev. B Volume: 83 Pages: 155324/1-155324/7
  • DOI: DOI:10.1103/PhysRevB.83.155324
  • URL: http://hdl.handle.net/2433/139587
  • Peer Reviewed
• [Journal Article] Observation of charged excitons in hole-doped carbon nanotubes using photoluminescence and absorption spectroscopy (2011)
  • Author(s): R. Matsunaga, K. Matsuda, and Y. Kanemitsu
  • Journal Title: Phys. Rev. Lett Volume: 106 Pages: 037404/1-037404/4
  • DOI: DOI:10.1103/PhysRevLett.106.037404
  • URL: http://hdl.handle.net/2433/138081
  • Peer Reviewed
• [Journal Article] Band-to-band photoluminescence in SrTiO_3 (2010)
  • Author(s): Y. Yamada and Y. Kanemitsu
  • Journal Title: Phys. Rev. B Volume: 82 Pages: 121103(R)/1-121103(R)/4
  • DOI: DOI:10.1103/PhysRevB.82.121103
  • URL: http://hdl.handle.net/2433/128881
  • Peer Reviewed
• [Journal Article] Symmetry-induced nonequilibrium distributions of bright and dark exciton states in single carbon nanotubes (2009)
  • Author(s): R. Matsunaga, Y. Miyauchi, K. Matsuda, and Y. Kanemitsu
  • Journal Title: Phys. Rev. B Volume: 80 Pages: 115436/1-115436/6
  • DOI: DOI:10.1103/PhysRevB.80.115436
  • URL: http://hdl.handle.net/2433/87338
  • Peer Reviewed
• [Journal Article] Temperature dependence of photoluminescence spectra of undoped and electron-doped SrTiO_3: Crossover from Auger recombination to single-carrier trapping (2009)
  • Author(s): Y. Yamada, H. Yasuda, T. Tayagaki, and Y. Kanemitsu
  • Journal Title: Phys. Rev. Lett Volume: 102 Pages: 247401/1-247401/4
  • DOI: DOI:10.1103/PhysRevLett.102.247401
  • URL: http://hdl.handle.net/2433/87342
  • Peer Reviewed
• [Journal Article] Photoluminescence dynamics and reduced Auger recombination in Si_<1-x>Ge_x/Si superlattices under high-density photoexcitation (2009)
  • Author(s): T. Tayagaki, S. Fukatsu, and Y. Kanemitsu
  • Journal Title: Phys. Rev. B Volume: 79 Pages: 041301(R)/1-041301(R)/4
  • DOI: DOI:10.1103/PhysRevB.79.041301
  • URL: http://hdl.handle.net/2433/87341
  • Peer Reviewed
• [Presentation] Dynamics of excitons and trions in semiconducting carbon nanotube (2013)
  • Author(s): M. Okano, T. Nishihara, Y. Yamada, and Y. Kanemitsu
  • Organizer: SPIE Photonics West 2013
  • Place of Presentation: California, USA
  • Year and Date: 2013-02-06
• [Presentation] Multiexciton Generation and Recombination in Semiconductor Nanomaterials (2012)
  • Author(s): Y. Kanemitsu
  • Organizer: 2012 International Conference on Solid State Devices and Materials (SSDM2012)
  • Place of Presentation: Kyoto, JAPAN
  • Year and Date: 2012-09-25
• [Presentation] Optical Responses of Group IV Semiconductor Nanostructures (2012)
  • Author(s): Y. Kanemitsu
  • Organizer: International Union of Materials Research Societies- Int'l Conf. on Electronic Materials (IUMRS-ICEM2012)
  • Place of Presentation: Yokohama, JAPAN
  • Year and Date: 2012-09-24
• [Presentation] Dynamics of Excitons and Trions in single-walled carbon nanotubes (2012)
  • Author(s): T. Nishihara, M. Okano and Y. Kanemitsu
  • Organizer: 221st Electrochemical Society Meeting
  • Place of Presentation: Seattle, USA
  • Year and Date: 2012-05-08
• [Presentation] Blue Light Emission and Photocarrier Dynamics of Perovskite Oxide Semiconductors (2011)
  • Author(s): Y. Yamada, and Y. Kanemitsu
  • Organizer: 16th International Conference on Luminescence & Optical Spectroscopy of Condensed Matter (ICL'11)
  • Place of Presentation: Ann Arbor, USA
  • Year and Date: 2011-06-30
• [Presentation] Blue light emission from highly photoexcited SrTiO3 (2010)
  • Author(s): Y. Yamada and Y. Kanemitsu
  • Organizer: 30th International Conference on the Physics of Semiconductors (ICPS 2010)
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2010-07-30
• [Presentation] Well-width dependence of Auger recombination rate in Si_<1-x>Ge_x/Si single quantum wells under high-density Photoexcitation (2010)
  • Author(s): T. Tayagaki, S. Fukatsu, and Y. Kanemitsu
  • Organizer: European Materials Research Society, E-MRS 2010 Meeting
  • Place of Presentation: Strasbourg, France
  • Year and Date: 2010-06-09
• [Book] Light emission from silicon nanoparticles and related materials, Comprehensive Semiconductor Science and Technology (P. Bhattacharya, R. Fornari, and H. Kamimura 編) (2011)
  • Author(s): Y. Kanemitsu
  • Total Pages: 196-212
  • Publisher: Elsevier Science, vol.2
• [Book] Optical spectroscopy of nanomaterials, Handbook of Nanophysics: Nanoelectronics and Nanophotonics (Klauss D. Sattler 編) (2010)
  • Author(s): Y. Kanemitsu
  • Total Pages: 22/1-22/9
  • Publisher: CRC Press
• [Remarks]
  • URL: http://www.scl.kyoto-u.ac.jp/~opt-nano/index.html