Noritaka Usami

Overview

Best Publications

• A quantum-dot spin qubit with coherence limited by charge noise and fidelity higher than 99.9.

  Jun Yoneda;Kenta Takeda;Tomohiro Otsuka;Tomohiro Otsuka;Takashi Nakajima

  952
  Citations

• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise

  J. Yoneda;K. Takeda;T. Otsuka;T. Nakajima

  589
  Citations

• Optical properties of ZnO rods formed by metalorganic chemical vapor deposition

  B. P. Zhang;N. T. Binh;Y. Segawa;K. Wakatsuki

  394
  Citations

• Island formation during growth of Ge on Si(100): A study using photoluminescence spectroscopy

  H. Sunamura;N. Usami;Y. Shiraki;S. Fukatsu

  322
  Citations

• Formation of highly aligned ZnO tubes on sapphire (0001) substrates

  B. P. Zhang;N. T. Binh;K. Wakatsuki;Y. Segawa

  249
  Citations

• Growth of structure-controlled polycrystalline silicon ingots for solar cells by casting

  Kozo Fujiwara;Wugen Pan;Noritaka Usami;Kohei Sawada

  198
  Citations

• Effects of growth temperature on the characteristics of ZnO epitaxial films deposited by metalorganic chemical vapor deposition

  B.P. Zhang;K. Wakatsuki;N.T. Binh;N. Usami

  173
  Citations

• Growth of ZnO∕MgZnO quantum wells on sapphire substrates and observation of the two-dimensional confinement effect

  B. P. Zhang;N. T. Binh;K. Wakatsuki;C. Y. Liu

  166
  Citations

• Control of Ge dots in dimension and position by selective epitaxial growth and their optical properties

  E. S. Kim;N. Usami;Y. Shiraki

  164
  Citations

• Investigation of grain boundaries in BaSi2 epitaxial films on Si(1 1 1) substrates using transmission electron microscopy and electron-beam-induced current technique

  Masakazu Baba;Katsuaki Toh;Kaoru Toko;Noriyuki Saito

  162
  Citations

• Exploring the potential of semiconducting BaSi2 for thin-film solar cell applications

  Takashi Suemasu;Noritaka Usami

  145
  Citations

• Enhanced quantum efficiency of solar cells with self-assembled Ge dots stacked in multilayer structure

  Arnold Alguno;Noritaka Usami;Toru Ujihara;Kozo Fujiwara

  142
  Citations

• In situ observation of elementary growth steps on the surface of protein crystals by laser confocal microscopy

  Gen Sazaki;Takuro Matsui;Katsuo Tsukamoto;Noritaka Usami

  130
  Citations

• Determination of Bulk Minority-Carrier Lifetime in BaSi2 Earth-Abundant Absorber Films by Utilizing a Drastic Enhancement of Carrier Lifetime by Post-Growth Annealing

  Kosuke O. Hara;Noritaka Usami;Kotaro Nakamura;Ryouta Takabe

  130
  Citations

• Grain growth behaviors of polycrystalline silicon during melt growth processes

  Kozo Fujiwara;Yoshikazu Obinata;Toru Ujihara;Noritaka Usami

  122
  Citations

• Directional growth method to obtain high quality polycrystalline silicon from its melt

  K. Fujiwara;W. Pan;K. Sawada;M. Tokairin

  122
  Citations

• Generation mechanism of dislocations during directional solidification of multicrystalline silicon using artificially designed seed

  Isao Takahashi;Noritaka Usami;Kentaro Kutsukake;Gaute Stokkan

  116
  Citations

• Highly (111)-oriented Ge thin films on insulators formed by Al-induced crystallization

  K. Toko;M. Kurosawa;N. Saitoh;N. Yoshizawa

  115
  Citations

• Low-temperature (180 °C) formation of large-grained Ge (111) thin film on insulator using accelerated metal-induced crystallization

  K. Toko;R. Numata;N. Oya;N. Fukata

  110
  Citations

• Influence of grain size and surface condition on minority-carrier lifetime in undoped n-BaSi2 on Si(111)

  Ryota Takabe;Kosuke O. Hara;Masakazu Baba;Weijie Du

  97
  Citations

• Investigation of the recombination mechanism of excess carriers in undoped BaSi2 films on silicon

  K. O. Hara;N. Usami;K. Toh;M. Baba

  96
  Citations