Publications

2008 - present

1. In_0.75Ga_0.25As Quantum Point Contacts Utilizing Wrap-Gate Geometry

   H. Irie, Y. Harada, H. Sugiyama, and T. Akazaki

   Appl. Phys. Express 5, 024001 (2012).

2. Cooper-pair Radiative Recombination in Semiconductor Heterostructures: Impact on Quantum Optics and Optoelectronics

   I. Suemune, H. Sasakura, S. Kuramitsu, Y. Hayashi, K. Tanaka, T. Akazaki, Y. Asano, R. Inoue, H. Takayanagi, E. Hanamura, J-H. Huh, C. Hermannstädter, S. Odashima, and H. Kumano,

   Jpn. J. Appl. Phys. 51, 010114 (2012).

3. Resonance-hybrid states in a triple quantum dot

   S. Amaha, T. Hatano, H. Tamura, S. Teraoka, T. Kubo, Y. Tokura, D. G. Austing, and S. Tarucha

   Phys. Rev. B 85, 081301(R) (2012).

4. Near-Field Optical Mapping of Quantum Hall Edge States
   H. Ito, K. Furuya, Y. Shibata, S. Kashiwaya, M. Yamaguchi, T. Akazaki, H. Tamura, Y. Ootuka, and S. Nomura
   Phys. Rev. Lett. 107, 256803 (2011).

5. Enhanced Photon Generation in a Nb/n-InGaAs/p-InP Superconductor/Semiconductor-diode Light Emitting Device

   H. Sasakura, S. Kuramitsu, Y. Hayashi, K. Tanaka, T. Akazaki, E. Hanamura, R. Inoue, H. Takayanagi, Y. Asano, C. Hermannstädter, H. Kumano, and I. Suemune

   Phys. Rev. Lett. 107, 157403 (2011).

6. Evaluation of spin polarization in p-In_0.96Mn_0.04As using Andreev reflection spectroscopy including inverse proximity effect

   T. Akazaki, T. Yokoyama, Y. Tanaka, H. Munekata, and H. Takayanagi

   Phys. Rev. B 83, 155212 (2011).

7. Transport properties of Andreev polarons in superconductor-semiconductor-superconductor junction with superlattice structure

   R. Inoue, K. Muranaga, H. Takayanagi, E. Hanamura, M. Jo, T. Akazaki, and I. Suemune

   Phys. Rev. Lett. 106, 157002 (2011).

8. Precise slit-width control of niobium apertures for superconducting LEDs

   J-H. Huh, C. Hermannstadter, H. Sato, S. Ito, Y. Idutsu, H. Sasakura, K. Tanaka, T. Akazaki, and I. Suemune

   Nanotechnology 22, 045302 (2011).

9. Single-photon detection using magnesium diboride superconducting nanowires

   H. Shibata, H. Takesue, T. Honjo, T. Akazaki, and Y. Tokura

   Appl. Phys. Lett. 97, 212504 (2010).

10. Mapping of quantum-hall edge channels by a dilution-refrigerator based near-field scanning optical microscope

    H. Ito, K. Furuya, Y. Shibata, Y. Ootuka, S. Nomura, S. Kashiwaya, M. Yamaguchi, H. Tamura, and T. Akazaki

    J. Nonlinear Opt. Phys. Mater. 19, 563-569 (2010).

11. Nano-fabrication processes for magnesium diboride

    H. Shibata, T. Akazaki, and Y. Tokura

    Physica C 470, S1005 (2010).

12. Superconducting transport in an LED with Nb electrodes

    H. Takayanagi, R. Inoue, T. Akazaki, K. Tanaka, and I. Suemune

    Physica C 470, 814 (2010).

13. Evaluation of spin polarization in p-In_0.96Mn_0.04As using Andreev reflection spectroscopy

    T. Akazaki, T. Yokoyama, Y. Tanaka, H. Munekata, and H. Takayanagi

    J. of Physics: Conf. Series 234, 042001 (2010).

14. Establishment of equilibrium of electrostatic potential by photo-irradiation in a GaAs quantum well at low temperature

    M. Yamaguchi, S. Nomura, M. Delbecq, H. Tamura, and T. Akazaki

    J. of Physics: Conf. Series 210, 012051 (2010).

15. A Cooper-Pair Light-Emitting Diode: Temperature Dependence of Both Quantum Efficiency and Radiative Recombination Lifetime

    I. Suemune, S. Kuramitsu,Y. Hayashi, K. Tanaka, T. Akazaki, H. Sasakura, R. Inoue, H. Takayanagi, Y. Asano, E. Hanamura, S. Odashima, and H. Kumano

    Appl. Phys. Express 3, 054001 (2010).

16. Photoluminescence spectra of gated undoped quantum well with lateral potential modulation in low electron density

    M. Yamaguchi, S. Nomura, H. Tamura, and T. Akazaki

    Physica E 42, 1167 (2010).

17. Charge states of a collinearly and laterally coupled vertical triple quantum dot device

    S. Amaha, T. Hatano, H. Tamura, S. Teraoka, T. Kubo, Y. Tokura, D. G. Austing, S. Tarucha

    Physica E 42, 899 (2010).

18. Fano-Kondo effect in side-coupled double quantum dot

    H. Tamura and S. Sasaki

    Physica E 42, 864 (2010).

19. Transport characteristics of a superconductor-based LED

    R. Inoue, H. Takayanagi, T. Akazaki, K. Tanaka, and I. Suemune

    Supercond. Sci. Technol. 23, 034025 (2010).

20. Kondo Effect in a Semiconductor Quantum Dot with a Spin-Accumulated Lead

    T. Kobayashi, S. Tsuruta, S. Sasaki, T. Fujisawa, Y. Tokura, and T. Akazaki

    Phys. Rev. Lett. 104, 036804 (2010).

21. Measurement of spin polarization in p-In_0.96Mn_0.04As using Andreev reflection spectroscopy

    T. Akazaki, T. Yokoyama, Y. Tanaka, H. Munekata, and H. Takayanagi

    Physics Procedia 3, 1291 (2010).

22. Photoluminescence spectroscopy of the low-density two-dimensional electron system in electric fields

    M. Yamaguchi, S. Nomura, H. Tamura, and T. Akazaki

    Physics Procedia 3, 1183 (2010).

23. Position dependent optical effect on the transport properties of S-Sm-S junctions

    K. Tsumura, S. Nomura, T. Akazaki, and H. Takayanagi

    Physics Procedia 3, 1177 (2010).

24. Fano-Kondo interplay in a side-coupled double quantum dot

    S. Sasaki, H. Tamura, T. Akazaki, T. Fujisawa

    Phys. Rev. Lett. 103, 266806 (2009).

25. Photon detection and fabrication of MgB₂ nanowire

    H. Shibata, M. Asahi, T. Maruyama, T. Akazaki, H. Takesue, T. Honjo, and Y. Tokura

    IEEE Trans. Appl. Supercond. 19, 358-360 (2009).

26. Optical imaging of the transport properties of S-Sm-S junctions
    K. Tsumura, S. Nomura, T. Akazaki, and H. Takayanagi
    J. of Physics: Conf. Series 150, 052273 (2009).

27. InGaAs-based S-Sm-S junctions when exposed to infrared light

    T. Akazaki, H. Hashiba, M. Yamaguchi, K. Tsumura, S. Nomura, and H. Takayanagi

    J. of Physics: Conf. Series 150, 052004 (2009).

28. Spin-polarized carrier injection effect in ferromagnetic semiconductor/diffusive semiconductor/superconductor junctions

    T. Akazaki, Y. Sawa, T. Yokoyama, Y. Tanaka, A. A. Golubov, H. Munekata, N. Nishizawa, and H. Takayanagi

    J. of Physics: Conf. Series 150, 022085 (2009).

29. Observation of enhanced luminescence emitted from InAs quantum dots with direct contact to superconducting niobium stripe

    Y. Idutsu, M. Takada, Y. Hayashi, T. Akazaki, H. Kumano, I.Suemune

    physica status solidi (c) 6, 849 (2009).

30. Evidence of a transition from nonlinear to linear screening of a two-dimensional electron system detected by photoluminescence spectroscopy

    M. Yamaguchi, S. Nomura, T. Maruyama, S. Miyashita, Y. Hirayama, H. Tamura, and T. Akazaki

    Phys. Rev. Lett. 101, 207401 (2008).

31. Optical mapping of properties of two-dimensional electron system in magnetic fields

    N. Hayashi, K. Tsumura, S. Nomura, M. Yamaguchi, H. Tamura, T. Akazaki, and Y. Hirayama

    Physica E 40, 1533 (2008).

32. Density dependent electron effective mass probed by photo luminescence down to dilute electron density limit

    S. Nomura, M. Yamaguchi, T. Akazaki, H. Tamura, T. Maruyama, S. Miyashita, and Y. Hirayama

    Physica E 40, 1467 (2008).

33. Negative photoconductivity in In_0.52Al_0.48As/In_0.7Ga_0.3As heterostructures

    T. Akazaki, M. Yamaguchi, K. Tsumura, S. Nomura, and H. Takayanagi

    Physica E 40, 1341 (2008).

34. Interplay between electrostatic and tunnel couplings in an independently contacted double quantum dot-quantum wire coupled device

    S. Sasaki, H. Tamura, S. Miyashita, T. Maruyama, T. Akazaki, Y. Hirayama and H. Takayanagi

    Physica E 40, 1292 (2008).

35. Photon detection and fabrication of MgB₂ nanowire

    H. Shibata, T. Maruyama, T. Akazaki, H. Takesue, T. Honjo, and Y. Tokura

    Physica C 468, 1992 (2008).

36. Superconducting proximity effect and reentrant behaviors in random network carbon nanotubes

    Y.-L. Zhong, H. Nakano, T. Akazaki, K. Kanzaki, Y. Kobayashi, and H. Takayanagi

    Physica C 468, 709 (2008).

37. Role of Cooper Pairs for the Generation of Entangled Photon Pairs from Single Quantum Dots

    I. Suemune, T. Akazaki, K. Tanaka, M. Jo, K. Uesugi, M. Endo, H. Kumano, and E. Hanamura

    Microelectronics Journal 39, 344-347 (2008).

38. Differential resistance oscillations with microwave irradiation in a superconductor-semiconductor junction

    R. Inoue, H. Takayanagi, M. Jo, T. Akazaki, and I. Suemune

    J. of Physics: Conf. Series 109, 012033 (2008).

39. Superconductor-based light emitting diode: demonstration of role of cooper pairs in radiative recombination processes

    Y. Hayashi, K. Tanaka, T. Akazaki, M. Jo, H. Kumano, and I. Suemune

    Appl. Phys. Express 1, 011701 (2008).

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