Biography

• 2001 Bachelor of Engineering, Electrical engineering, Tohoku University
  
  
• 2002 Master of Engineering, Electronics, Tohoku University
  
  
• 2005 Doctorate of Engineering, Electronics, Tohoku University
  
  
• 2005 Joined NTT Basic Research Laboratories
  
  

-Member of The Japan Society of Applied Physics (JSAP)

Research Interest

• Optical properties of semiconductor nanostructures
  
  
• Semiconductor Spintronics
  
  
• Quantum information processing in solid state system
  
  

Publications

Optical properties of quantum wells modulated by surface acoustic waves

• "Manipulation of mobile spin coherence using magnetic-field-free electron spin resonance"
  H. Sanada, Y. Kunihashi, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, P. V. Santos, and T. Sogawa
  Nature Physics 9, 280 (Mar. 2013).
  
      → see also:
           News and Views by M. Kataoka
           News Release (English / Japanese) in NTT-BRL website
  
  
  
• "Dynamic control of photoluminescence polarization properties in GaAs/AlAs quantum wells by surface acoustic waves"
  T. Sogawa, H. Sanada, H. Gotoh, H. Yamaguchi, and P. V. Santos
  Physical Review B 86, 035311 (Jul. 2012).
  
  
• "Spatially modulated photoluminescence properties in dynamically strained GaAs/AlAs quantum wells by surface acoustic wave"
  T. Sogawa, H. Sanada, H. Gotoh, H. Yamaguchi, and P. V. Santos
  Applied Physics Letters 100, 162109 (Apr. 2012).
  
  
• "Acoustically induced spin-orbit interactions revealed by two-dimensional imaging of spin transport in GaAs"
  H. Sanada, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, P. V. Santos, T. Sogawa
  Physical Review Letters 106, 216602 (May 2011).
  
      → see also:
           News Release (English / Japanese) in NTT-BRL website
  
  
  
• "Spatial and temporal modulation of exciton photoluminescence properties in GaAs/AlAs dynamic quantum dots formed by surface acoustic waves"
  T. Sogawa, H. Sanada, H. Gotoh, H. Yamaguchi, S. Miyashita, and P. V. Santos
  Physical Review B 80, 075304 (Aug. 2009).
  
  
• "Photoluminescence dynamics in GaAs/AlAs quantum wells modulated by one-dimensional standing surface acoustic waves"
  T. Sogawa, H. Sanada, H. Gotoh, H. Yamaguchi, S. Miyashita, and P. V. Santos
  Applied Physics Letters 94, 131912 (Apr. 2009).
  
  
• "Photoluminescence dynamics of GaAs/AlAs quantum wells modulated by surface acoustic waves"
  T. Sogawa, H. Sanada, H. Gotoh, H. Yamaguchi, S. Miyashita, and P. V. Santos
  Japanese Journal of Applied Physics 46, No. 31, L758-L760 (Aug. 2007).
  
  



Optical properties of semiconductor quantum dots/nanowires

• "Nonlinear optical spectra having characteristics of Fano interferences in coherently coupled lowest exciton biexciton states in semiconductor quantum dots"
  H. Gotoh, H. Sanada, H. Yamaguchi, and T. Sogawa
  AIP Advances 4, 107124 (Sep. 2014) .
  
  
• "Modifying exciton optical properties in quantum dots with coherent phonons induced by ultrafast optical pulses"
  H. Gotoh, H. Sanada, H. Yamaguchi, and T. Sogawa
  Applied Physics Letters 103, 112104 (Sep. 2013) .
  
  
• "Charged exciton creation with two-color optical excitation method and analysis of initialization process of electron spin qubit in quantum dots"
  H. Gotoh, H. Sanada, H. Yamaguchi, and T. Sogawa
  Journal of Applied Physics 111, 123520 (Jun. 2012) .
  
  
• "Creation of charged excitons with two-color excitation method and initialization of electron spin qubit in quantum dots"
  H. Gotoh, H. Sanada, H. Kamada, H. Yamaguchi, and T. Sogawa
  Applied Physics Letters 98, 032101 (Jan. 2011).
  
  
• "Synthesis of GaAs nanowires with very small diameters and their optical properties with the radial quantum-confinement effect"
  G. Zhang, K. Tateno, H. Sanada, T. Tawara, H. Gotoh, and H. Nakano
  Applied Physics Letters 95, 123104 (Sep. 2009).
  
  
• "Magneto-optical spectroscopy of excitons and trions in charge-tunable quantum dots"
  H. Sanada, T. Sogawa, H. Gotoh, Y. Tokura, H. Yamaguchi, H. Nakano, and H. Kamada
  Physical Review B 79, 121303(R) (Mar. 2009).
  
  
• "Spin selective optical excitation in charge-tunable GaAs quantum dots"
  H. Sanada, T. Sogawa, H. Gotoh, H. Kamada, H. Yamaguchi, and H. Nakano
  Physica status solidi (c) 5, 2904-2906 (Jul. 2008).
  
  
• "Exciton and biexciton emissions from single GaAs quantum dots in (Al,Ga)As nanowires"
  H. Sanada, H. Gotoh, K. Tateno, and H. Nakano
  Japanese Journal of Applied Physics 46, No. 4B, 2578-2580 (Apr. 2007).
  
  
• "Detecting coupled excitons with microphotoluminescence techniques in bilayer quantum dots"
  H. Gotoh, H. Sanada, H. Kamada, and H. Nakano
  Physical Review B 74, 115322 (Sep. 2006).
  
  



Nuclear spins in GaAs quantum wells

• "Multipulse Operation and Optical Detection of Nuclear Spin Coherence in a GaAs/AlGaAs Quantum Well"
  Y. Kondo, M. Ono, S. Matsuzaka, K. Morita, H. Sanada, Y. Ohno, and H. Ohno
  Physical Review Letters 101, 207601 (Nov. 2008).
  
  
• "Optical pump-probe measurements of local nuclear spin coherence in semiconductor quantum wells"
  H. Sanada, Y. Kondo, S. Matsuzaka, K. Morita, C. Y. Hu, Y. Ohno, and H. Ohno
  Physical Review Letters 96, 067602 (Feb. 2006).
  
  
• "Gate control of dynamic nuclear polarization in GaAs quantum wells"
  H. Sanada, S. Matsuzaka, K. Morita, C.Y. Hu, Y. Ohno, and H. Ohno
  Physical Review Letters 94, 097601 (Mar. 2005).
  
  
• "Hysteretic dynamic nuclear polarization in GaAs/AlxGa1-xAs (110) quantum wells"
  H. Sanada, S. Matsuzaka, K. Morita, C.Y. Hu, Y. Ohno, and H. Ohno
  Physical Review B 68, 241303(R) (Dec. 2003).
  
  



Carrier spin dynamics in semiconductors

• "Drift-Induced Enhancement of Cubic Dresselhaus Spin-Orbit Interaction in a Two-Dimensional Electron Gas" (New!)
  Y. Kunihashi, H. Sanada, Y. Tanaka, H. Gotoh, K. Onomitsu, K. Nakagawara, M. Kohda, J. Nitta, and T. Sogawa
  Physical Review Letters 119, 187703 (Oct. 2017).
  
  
• "Drift transport of helical spin coherence with tailored spin-orbit interactions"
  Y. Kunihashi, H. Sanada, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, and T. Sogawa
  Nature Communications 7, 10722 (Mar. 2016).
  
  
• "Proposal of spin complementary field effect transistor"
  Y. Kunihashi, M. Kohda, H. Sanada, H. Gotoh, T. Sogawa, and J. Nitta
  Applied Physics Letters 100, 113502 (Mar. 2012).
  
  
• "Proposal for electrical detection of spin separation with in-plane magnetic field in mesoscopic Stern-Gerlach spin filter"
  M. Kohda, J. Ohe, H. Sanada, M. Yamamoto, T. Otsuki, J. Nitta
  Proc. SPIE 7600, 76001B (2010).
  
  
• "Intersubband exchange interaction induced by optically excited electron spins in GaAs/AlGaAs quantum wells"
  K. Morita, H. Sanada, S. Matsuzaka, Y. Ohno, and H. Ohno
  Applied Physics Letters 94, 162104 (Apr. 2009).
  
  
• "Strong anisotropic spin dynamics in narrow n-InGaAs/AlGaAs (110) quantum wells"
  K. Morita, H. Sanada, S. Matsuzaka, C.Y. Hu, Y. Ohno, and H. Ohno
  Applied Physics Letters 87, 171905 (Oct. 2005).
  
  
• "Spin precession of holes in wurtzite GaN studied using the time-resolved Kerr rotation technique"
  C.Y. Hu, K. Morita, H. Sanada, S. Matsuzaka, Y. Ohno, and H. Ohno
  Physical Review B 72, 121203 (Sep. 2005).
  
  
• "Anisotropic g-factor dependence of dynamic nuclear polarization in n-GaAs/AlGaAs (110) quantum wells"
  S. Matsuzaka. H. Sanada, K. Morita, C.Y. Hu, Y. Ohno, and H. Ohno
  AIP Conference Proceedings 772, 1453 (Jun. 2005).
  
  
• "Electron spin dynamics in InGaAs quantum wells"
  K. Morita, H. Sanada, S. Matsuzaka, C.Y. Hu, Y. Ohno, and H. Ohno
  Physica E 21, 1007-1011 (Mar. 2004).
  
  



Electron spin transport in bulk GaAs

• "Drift transport of spin-polarized electrons in GaAs"
  H. Sanada, I. Arata, Y. Ohno, K. Ohtani, Z. Chen, K. Kayanuma, Y. Oka, F. Matsukura, and H. Ohno
  Journal of Superconductivity 16, 217-219 (Feb. 2003).
  
  
• "Relaxation of photoinjected spins during drift transport in GaAs"
  H. Sanada, I. Arata, Y. Ohno, Z. Chen, K. Kayanuma, Y. Oka, F. Matsukura, and H. Ohno
  Applied Physics Letters 81, 2788-2790 (Oct. 2002).
  
  



Other topics

• "Bias dependence of spin injection/transport properties of a perpendicularly magnetized FePt/MgO/GaAs structure"
  R. Ohsugi, Y. Kunihashi, H. Sanada, M. Kohda, H. Gotoh, T. Sogawa and J. Nitta
  Applied Physics Express 9, 043002 (Mar. 2016).
  
  
• "Determination of phonon decay rate in p-type silicon under Fano resonance by measurement of coherent phonons"
  K. Kato, K. Oguri, H. Sanada, T. Tawara, T. Sogawa and H. Gotoh
  AIP Advances 5, 097152 (Sep. 2015).
  
  
• "Carrier-mediated optomechanical coupling in GaAs cantilevers"
  H. Okamoto, D. Ito, T. Watanabe, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, H. Yamaguchi
  Physical Review B 84, 014305 (Jul. 2011).
  
  
• "Vibration amplification, damping, and self-oscillations in micromechanical resonators induced by optomechanical coupling through carrier excitation"
  H. Okamoto, D. Ito, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, H. Yamaguchi
  Physical Review Letters 106, 036801 (Jan. 2011).
  
  





Contact Information



NTT Basic Research Laboratories
3-1, Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198 Japan






Link



• Quantum Optical Physics Research Group
  
  
• Optical Science Laboratory
  
  
• NTT Basic Research Laboratories
  
  
• Nippon Telegraph and Telephon Corporation