ORCID iDhttps://orcid.org/0000-0003-4784-6751

論文/Papers

  1. Hot-carrier generation in a solar cell containing InAs/GaAs quantum-dot superlattices as a light absorber
    D. Watanabe, N. Iwata, S. Asahi, Y. Harada, and T. Kita
    Applied Physics Express 11, pp. 082303-1–4 (2018).

  2. Assessing the nature of the distribution of localised states in bulk GaAsBi
    T. Wilson, N. P. Hylton, Y. Harada, P. Pearce, D. Alonso-Álvarez, A. Mellor, R. D. Richards, J. P. R. David, and N. J. Ekins-Daukes
    Scientific Reports 8, pp. 6457-1–10 (2018). Kobe University Repository Kernel

  3. Increasing conversion efficiency of two-step photon up-conversion solar cell with a voltage booster hetero-interface
    S. Asahi, K. Kusaki, Y. Harada, and T. Kita
    Scientific Reports 8, pp. 872-1–8 (2018). Kobe University Repository Kernel

  4. Spatially resolved electronic structure of an isovalent nitrogen center in GaAs
    R. C. Plantenga, V. R. Kortan, T. Kaizu, Y. Harada, T. Kita, M. E. Flatté, and P. M. Koenraad
    Physical Review B 96, pp. 155210-1–8 (2017).

  5. Efficient two-step photocarrier generation in bias-controlled InAs/GaAs quantum dot superlattice intermediate-band solar cells
    T. Kada, S. Asahi, T. Kaizu, Y. Harada, R. Tamaki, Y. Okada, and T. Kita
    Scientific Reports 7, pp. 5865-1–10 (2017). Kobe University Repository Kernel

  6. Two-step photocurremt generation enhanced by miniband formation in InAs/GaAs quantum dot superlattice intermediate-band solar cells
    S. Watanabe, S. Asahi, T. Kada, K. Hirao, T. Kaizu, Y. Harada, and T. Kita
    Applied Physics Letters 110, pp. 193104-1–5 (2017). Kobe University Repository Kernel

  7. Photocarrier transport dynamics in InAs/GaAs quantum dot superlattice solar cells using time-of-flight spectroscopy
    T. Tanibuchi, T. Kada, S. Asahi, D. Watanabe, T. Kaizu, Y. Harada, and T. Kita
    Physical Review B 94, pp. 195313-1–9 (2016). Kobe University Repository Kernel

  8. Polarization characteristics of electroluminescence and net modal gain in highly stacked InAs/GaAs quantum-dot laser devices
    M. Suwa, T. Andachi, T. Kaizu, Y. Harada, and T. Kita
    Journal of Applied Physics 120, pp. 134313-1–6 (2016). Kobe University Repository Kernel

  9. Effects of rapid thermal annealing on two-dimensional delocalized electronic states of the epitaxial N δ-doped layer in GaAs
    Y. Ogawa, Y. Harada, T. Baba, T. Kaizu, and T. Kita
    Applied Physics Letters 108, pp. 111905-1–4 (2016). Kobe University Repository Kernel

  10. Nanosecond-scale hot-carrier cooling dynamics in one-dimensional quantum dot superlattices
    Y. Harada, N. Kasamatsu, D. Watanabe, and T. Kita
    Physical Review B 93, pp. 115303-1–5 (2016). Kobe University Repository Kernel

  11. Two-step photon absorption in InAs/GaAs quantum-dot superlattice solar cells
    T. Kada, S. Asahi, T. Kaizu, Y. Harada, T. Kita, R. Tamaki, Y. Okada, and K. Miyano
    Physical Review B 91, pp. 201303(R)-1–6 (2015). Kobe University Repository Kernel

  12. Thermal annealing effects on ultra-violet luminescence properties of Gd doped AlN
    T. Kita, Y. Ishizu, K. Tsuji, Y. Harada, Y. Chigi, T. Nishimoto, H. Tanaka, M. Kobayashi, T. Ishihara, and H. Izumi
    Journal of Applied Physics 117, pp. 163105-1–5 (2015). Kobe University Repository Kernel

  13. Hot-carrier solar cells using low-dimensional quantum structures
    D. Watanabe, N. Kasamatsu, Y. Harada, and T. Kita
    Applied Physics Letters 105, pp. 171904-1–5 (2014).

  14. Polarization-insensitive optical gain characteristics of highly stacked InAs/GaAs quantum dots
    T. Kita, M. Suwa, T. Kaizu, and Y. Harada
    Journal of Applied Physics 115, pp. 233512-1–5 (2014). Kobe University Repository Kernel

  15. Resonant indirect excitation of Gd3+ in AlN thin films
    Y. Ishizu, K. Tsuji, Y. Harada, T. Kita, Y. Chigi, T. Nishimoto, H. Tanaka, M. Kobayashi, T. Ishihara, and H. Izumi
    Journal of Applied Physics 115, pp. 173508-1–6 (2014).

  16. Effect of internal electric field on InAs/GaAs quantum dot solar cells
    N. Kasamatsu, T. Kada, A. Hasegawa, Y. Harada, and T. Kita
    Journal of Applied Physics 115, pp. 083510-1–5 (2014). Kobe University Repository Kernel

  17. Epitaxial two-dimensional nitrogen atomic sheet in GaAs
    Y. Harada, M. Yamamoto, T. Baba, and T. Kita
    Applied Physics Letters 104, pp. 041907-1–4 (2014). Kobe University Repository Kernel

  18. Polarization controlled emission from closely stacked InAs/GaAs quantum dots
    M. Suwa, A. Takahashi, T. Ueda, Y. Bessho, Y. Harada, and T. Kita
    Physica Status Solidi C 10, pp. 1492–1495 (2013).

  19. Control of stacking direction and optical anisotropy in InAs/GaAs quantum dots by In flux
    Y. Bessho, Y. Harada, T. Kita, E. Taguchi, and H. Yasuda
    Journal of Applied Physics 114, pp. 033517-1–5 (2013).

  20. One-dimensional miniband formation in closely stacked InAs/GaAs quantum dots
    A. Takahashi, T. Ueda, Y. Bessho, Y. Harada, T. Kita, E. Taguchi, and H. Yasuda
    Physical Review B 87, pp. 235323-1–6 (2013).

  21. Intraband carrier dynamics in InAs/GaAs quantum dots stimulated by bound-to-continuum excitation
    Y. Harada, T. Maeda, and T. Kita
    Journal of Applied Physics 113, pp. 223511-1–5 (2013). Kobe University Repository Kernel

  22. Intermediate band photovoltaic based on interband-intraband transitions using In0.53Ga0.47As/InP superlattice
    W. G. Hu, Y. Harada, A. Hasegawa, T. Inoue, O. Kojima, and T. Kita
    Progress in Photovoltaics: Research and Applications 21, pp. 472–480 (2013).

  23. High-resolution optical coherence tomography using broadband light source with strain-controlled InAs/GaAs quantum dots
    I. Tsubaki, Y. Harada, and T. Kita
    Physica Status Solidi C 9, pp. 2473–2476 (2012).

  24. Carrier dynamics of the intermediate state in InAs/GaAs quantum dots coupled in a photonic cavity under two-photon excitation
    T. Kita, T. Maeda, and Y. Harada
    Physical Review B 86, pp. 035301-1–7 (2012). Kobe University Repository Kernel

  25. Near-field photoluminescence spectroscopy of CdTe/Cd0.75Mn0.25Te tilted superlattices
    Y. Harada, T. Kita, K. Matsuda, Y. Kanemitsu, and H. Mariette
    Physica Status Solidi C 9, pp. 262–265 (2012).

  26. Extremely uniform bound exciton states in nitrogen δ-doped GaAs studied by photoluminescence spectroscopy in external magnetic fields
    Y. Harada, T. Kubo, T. Inoue, O. Kojima, and T. Kita
    Journal of Applied Physics 110, pp. 083522-1–5 (2011). Kobe University Repository Kernel

  27. Experimental and atomistic theoretical study of degree of polarization from multilayer InAs/GaAs quantum dot stacks
    M. Usman, T. Inoue, Y. Harada, G. Klimeck, and T. Kita
    Physical Review B 84, pp. 115321-1–11 (2011).

  28. Multidirectional Observation of Photoluminescence Polarization Anisotropy in Closely Stacked InAs/GaAs Quantum Dots
    Y. Ikeuchi, T. Inoue, M. Asada, Y. Harada, T. Kita, E. Taguchi, and H. Yasuda
    Applied Physics Express 4, pp. 062001-1–3 (2011).

  29. Interaction between conduction-band edge and nitrogen-related localized levels in nitrogen δ-doped GaAs
    Y. Harada, O. Kojima, T. Kita, and O. Wada
    Physica Status Solidi C 8, pp. 365–367 (2011).

  30. Bound biexciton luminescence in nitrogen δ-doped GaAs
    Y. Harada, O. Kojima, T. Kita, and O. Wada
    Physica Status Solidi B 248, pp. 464–467 (2011).

  31. Statistical fluctuation of magnetization in Mn-composition modulated Cd0.75Mn0.25Te quantum wires
    Y. Harada, T. Kita, O. Wada, and H. Ando
    Journal of Applied Physics 107, pp. 043521-1–5 (2010).

  32. Anisotropic linear polarization luminescence in CdTe/CdMnTe quantum wires
    Y. Harada, T. Kita, O. Wada, H. Ando, and H. Mariette
    Journal of Luminescence 129, pp. 1448–1453 (2009).

  33. Anisotropic magneto-optical effects in CdTe/Cd0.75Mn0.25Te quantum wire structures
    Y. Harada, T. Kita, O. Wada, H. Ando, and H. Mariette
    Physical Review B 78, pp. 073304-1–4 (2008). Kobe University Repository Kernel
    (also selected in Virtual Journal of Nanoscale Science & Technology, Volume 18, Issue 9 in Optical Properties and Quantum Optics (September 1, 2008)).

  34. Fine structure splitting of isoelectronic bound excitons in nitrogen-doped GaAs
    T. Kita, Y. Harada, and O. Wada
    Physical Review B 77, pp. 193102-1–4 (2008). Kobe University Repository Kernel

  35. Anisotropic magneto-optical effects in one-dimensional diluted magnetic semiconductors
    Y. Harada, T. Kita, O. Wada, and H. Ando
    Physical Review B 74, pp. 245323-1–7 (2006). Kobe University Repository Kernel
    (also selected in Virtual Journal of Nanoscale Science & Technology, Volume 15, Issue 1 in Nanomagnetism and Spintronics (January 8, 2007)).

  36. Valence-band mixing induced by sp-d exchange interaction in CdMnTe quantum wires
    Y. Harada, T. Kita, O. Wada, L. Marsal, H. Mariette, and H. Ando
    Physica Status Solidi C 3, pp. 667–670 (2006).

  37. Anisotropic exchange interaction caused by hole-spin reorientation in (CdTe)0.5(Cd0.75Mn0.25Te)0.5 tilted superlattices grown on Cd0.74Mg0.26Te(0 0 1) vicinal surface
    T. Kita, S. Nagahara, R. Naganuma, Y. Harada, O. Wada, L. Marsal, and H. Mariette
    Journal of Crystal Growth 275, pp. e2221–e2224 (2005).

プロシーディングス/Proceedings

  1. Intraband carrier dynamics in InAs/GaAs quantum dots studied by two-color excitation spectroscopy
    Y. Harada, T. Maeda, and T. Kita
    Proceedings of SPIE 8620, pp. 862008-1–7 (2013).

  2. Magneto-Photoluminescence Spectroscopy of Exciton Fine Structure in Nitrogen δ-Doped GaAs
    Y. Harada, Y. Horiuchi, O. Kojima, T. Kita, and O. Wada
    AIP Conference Proceedings 1399, 30th International Conference on the Physics of Semiconductors (edited by H. Cheong), pp. 87–88 (2011).

  3. Exciton Fine Structure of Nitrogen Isoelectronic Centers in GaAs
    Y. Harada, T. Kita, and O. Wada
    Published on CD-ROM in "Proceedings of 20th International Conference on Indium Phosphide and Related Materials" (2008).

  4. Anisotropic Magnetic-Field Evolution of Valence-Band States in One-Dimensional Diluted Magnetic Semiconductors
    Y. Harada, T. Kita, O. Wada, and H. Ando
    AIP Conference Proceedings 893, 28th International Conference on the Physics of Semiconductors (edited by W. Jantsch and F. Schaffler), pp. 1245–1246 (2007).

国際会議/International Conference


   under construction

国内会議/Domestic Conference


   under construction