My Research and Inventions

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Contact:


Dr. Vadym Zayets


Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, Room C314b,
Umezono 1-1-1, Tsukuba,
Ibaraki-ken 305-8568, Japan.

 

tel: +81-298-61-5426
fax: +81-298-61-3432

email:
v.zayets (at symbol)gmail.com
v.zayets (at symbol)aist.go.jp
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Patents

  • "Bistable laser diode device based on non-reciprocal optical amplifier and fabrication method", V. Zayets and K. Ando, Japanese Patent 3829173.
  • "Growth method of thin films", V. Zayets and K. Ando, Japanese Patent 3972090.
  • "Laser diode with magnetic tunnel junction, non- volatile optical memory element, optical memory device using the same and operational method", V. Zayets Japanese Patent 4096100.
  • " Magneto-optical waveguide, polarizing rotor, optical isolator and their manufacturing method" V. Zayets and K. Ando, Japanese Published Patent Application 2005-315993.
  • " High speed nonvolatile optical memory element using photoinduction magnetization inversion, and its operation method" V. Zayets, Japanese Published Patent Application 2006-018964; "Non-volatile optical memory element utilizing optically induced magnetization reversal and operation method thereof" V. Zayets, US Patent No. 7171096.
  • "Nonvolatile optical memory device and operating method" V.Zayets and K.Ando, Japanese Patent Application 2008-001970, US application 2008-001970.
    Non-volatile memory element and method of operation therefor" US patent US7936631 B2. Publication Date 3 May 2011.
  • "The method of high-speed data read-out for spin-photon memory utilizing spin injection" Zayets, Saito, Yuasa, Ando, Japanese Patent Application 2009-177145
    "Nonvolatile optical memory element, memory device, and reading method thereof " US patent US8270198 B2, Publication Date 18 Sep 2012.
  • "Optical device using a plasmonic waveguide, and optical isolator" Zayets, Saito, Yuasa, Ando, US patent US 8750666 B2, Publication date: 10 Jun 2014. Japanese Patent Application 2012-150665. Application Date 2012/07/04. Japanese Patent number 2012000528.
  • " Magneto-optical measurement equipment. Magneto-optical measurement method” “光学的測定装置及び光学的測定方法” V. Zayets,T. Nozaki H. Saito, S. Yuasa, Patent application, 2016-126905, 2016; ( in Japanese; in English)
  • "All-metal transistor and its operational method" , “全金属型トランジスタとその方法” V. Zayets,T. Nozaki, A.Fukushima, S. Yuasa, Patent application 2017-226503, H29/06/06 ( figures; in Japanese; in English)
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Book chapter

V. Zayets and K. Ando, "Magneto-optical devices for optical integrated circuits" in book "Frontiers in Guided Wave Optics and Optoelectronics" ISBN 978-953-7619-82-4, Edited by Bishnu Pal, Publication date: Feb. 2010, pp. 321-342.

 


 


Journal Papers:

  1. H. Shimizu, V. Zayets, "Plasmonic isolator for photonic integrated circuits" MRS Bulletin 43 (2018) 425–429. (download pdf here)
  2. "Symmetry and polarity of the voltage-controlled magnetic anisotropy studied by the Anomalous Hall effect" working version of manuscript. Zayets July 14, 2018
  3. V. Zayets, "Spin transport of electrons and holes in a metal and in a semiconductor", Journal of Magnetism and Magnetic Materials 445, pp 53–65 (2018) .
  4. V. Zayets, H. Saito, S. Yuasa, "Photonic integration of plasmonic Magneto-optical waveguide and Si nanowire waveguide", Nanomaterials: Application & Properties (NAP), Proceedings of 2017 IEEE 7th International Conference, pp. 04NESP17-1 - 04NESP17-6 (2017). (download pdf here)
  5. V. Zayets, "Spin transport of electrons and holes in a metal and in a semiconductor", arXiv:1703.08020 (2017).
  6. V. Zayets, "High-Speed Non-Volatile Optical Memory: Achievements and Challenges", Electronics 6 (1), 7 (2017); Open access. The Special Issue on Spin Optoelectronics.
  7. A. Kozioł-Rachwał, T. Nozaki, V. Zayets, H. Kubota, A. Fukushima, S. Yuasa and Y. Suzuki, "The effect of the MgO buffer layer thickness on magnetic anisotropy in MgO/Fe/Cr/MgO buffer/MgO(001)" , J. Appl. Phys. 120, 085303 (2016);
  8. T. Nozaki, A. Kozioł-Rachwał, W. Skowroński, V. Zayets, Y.Shiota, S. Tamaru, H. Kubota, A. Fukushima, S. Yuasa, and Y.Suzuki, " Large Voltage-Induced Changes in the Perpendicular Magnetic Anisotropy of an MgO-Based Tunnel Junction with an Ultrathin Fe Layer" , Phys. Rev. Applied 5, 044006 (2016);
  9. V. Zayets, H. Saito, K. Ando, S. Yuasa , "Long-distance propagation of a surface plasmon on the surface of a ferromagnetic metal," Optics Express 23, 12834-12839 (2015).
  10. T. Kaihara, T. Ando, H. Shimizu, V. Zayets, H.Saito, K. Ando, and S. Yuasa "Enhancement of magneto-optical Kerr effect by surface plasmons in trilayer structure consisting of double-layer dielectrics and ferromagnetic metal" Optics Express, Vol. 23, Issue 9, pp. 11537-11555 (2015);
  11. "A method for reduction of propagation loss of surface plasmons. Experimental demonstration of the loss reduction for Fe/MgO/AlGaAs plasmonic structure integrated with AlGaAs/GaAs optical waveguide", ( arXiv:1501.02554).
  12. V Zayets, "A solution of the Boltzmann transport equations for spin and charge transport in a solid. Spin Proximity effect", arXiv:1410.7511; (2014)
  13. H Tanaka, W M Jadwisienczak, H Saito, V Zayets, S Yuasa and K Ando "Localized sp–d exchange interaction in ferromagnetic Ga1−xMnxAs observed by magnetic circular dichroism spectroscopy of L critical points", Journal of Physics D: Applied Physics 47 (2014) N35, 355001 (clich here to download pdf);
  14. V. Zayets "Spin rotation after a spin-independent scattering. Spin properties of an electron gas in a solid", Journal of Magnetism and Magnetic Materials 356 (2014)52–67 (clich here to download pdf); (http://arxiv.org/abs/1304.2150) .
  15. H. Hosoya, Y. Nagamine, K. Tsunekawa, V. Zayets, and S. Yuasa "Characterization of Ultrathin Fe–Co Layer Grown on Amorphous Co–Fe–B by In situ Reflective High-Energy Electron Diffraction", Appl. Phys. Express 6 063003 (2013);
  16. V. Zayets, H. Saito, S. Yuasa, and K. Ando, "Optical Isolator Utilizing Surface Plasmons" (invited paper), Materials 2012, 5(5), 857-871 (open access);
  17. V. Zayets, H. Saito, S. Yuasa, and K. Ando, "Enhancement of the transverse non-reciprocal magneto-optical effect", J. Appl. Phys. 111, 023103, 2012;
  18.  K. Ando, H. Saito, and V. Zayets "Anomalous Zeeman splittings of II–VI diluted magnetic semiconductors at L-critical points" J. Appl. Phys. 109, 07C304 (2011);
  19. V. Zayets, H. Saito, S. Yuasa, and K. Ando, " Magneto-optics in Diluted Magnetic Semiconductors and in Ferromagnetic-Metal/Semiconductor Hybrids (invited)", Proceedings of Material Research Society, 2011.03
  20. V.Zayets, "Utilizing spin in new optical devices", 第280回研究会資料  Vol. 280, pp 1-6
  21. V. Zayets, H. Saito, S. Yuasa and K. Ando, "Magnetization-dependent loss in (Al,Ga)As Optical Waveguide with a Embedded Fe micromagnet" Optics Letters Vol. 35, pp. 931-933 ,2010.
  22. H. Saito, J. C. Le Breton, V. Zayets, Y. Mineno,S. Yuasa, and K. Ando "Efficient spin injection into semiconductor from an Fe/GaOx tunnel injector" Applied Physics Letters 96, 012501, 2010.
  23. V. Zayets and K. Ando, "High- speed switching of spin polarization for proposed spin-photon memory" Applied Physics Letter, vol. 94, pp. 121104, 2009.
  24. H. Saito, J. C. Le Breton, V. Zayets, S. Yuasa, and K. Ando " Highly Enhanced Electron-Injection Efficiency in GaAs-Based Light-Emitting Diodes Using a Fe/GaOx Tunnel Injector" Applied Physics Express vol. 2 , pp. 083003, 2009
  25. K. Ando, H. Saito, M.C. Debnath, V. Zayets, and A. K. Bhattacharjee " Zeeman splittings near the L point of the Brillouin zone in zinc-blende semiconductors" , Phys. Rev. B. 77, pp. 125123, 2008.
  26. K. Ando, H. Saito, M.C. Debnath, V. Zayets, and A. K. Bhattacharjee " Zeeman splittings near the L point of the Brillouin zone in zinc-blende semiconductors" , Reply, Phys. Rev. Lett. 102, pp. 069702, 2009.
  27. K. Ando, H. Saito, K.C. Agarwal, M.C. Debnath, and V. Zayets "Origin of the Anomalous Magnetic Circular Dichroism Spectral Shape in Ferromagnetic Ga1-xMnxAs: Impurity Bands inside the Band Gap" Phys. Rev. Lett. 100, pp. 067204, 2008.
  28. M. C. Debnath, V. Zayets, and K. Ando," (Cd,Mn)Te/(Cd,Zn)Te quantum-well waveguide optical isolator with wide wavelength operational bandwidth" Appl. Phys. Lett., 91, 043502-1 (2007).
  29. M. C. Debnath, V. Zayets, and K. Ando "Complete magneto-optical TE-TM mode conversion in Cd1-xMnxTe waveguide for integrated optical isolator" , Phys. Stat. Sol. (c), 3, 1164 (2006).
  30. V. Zayets and K. Ando "Isolation Effect in Ferromagnetic-Metal/Semiconductor Hybrid Optical Waveguide", Applied Physics Letter, vol. 86, pp. 261105, 2005.
  31. M. C. Debnath, V. Zayets, and K. Ando "Thermal annealing of magneto-optical (Cd,Mn)Te waveguide for optical isolator with wider operation wavelength range" , Applied Physics Letter, 87, 091112 (2005).
  32. V. Zayets, M. Debnath, and K. Ando,"Optical isolation in Cd 1-xMnxTe magneto-optical waveguide grown on GaAs substrate", Journal of Optical Society of America B, vol. 22, pp.281-285, 2005.
  33. V. Zayets, M. Debnath, and K. Ando "Complete magneto-optical waveguide mode conversion in Cd 1-xMnxTe waveguide on GaAs substrate", Applied Physics Letter, vol. 84, pp.565-567, 2004.
  34. M. Debnath, V. Zayets, and K. Ando," Enhancement of magneto-optical transverse electric-transverse magnetic mode conversion efficiency of (Cd,Mn)Te waveguide by graded-index clad layers", Journal of Applied Physics vol. 95, pp. 7181-7183, 2004.
  35. K. Ando, H. Saito, V. Zayets and M. C. Debnath " Optical properties and functions of diluted magnetic semiconductors", Journal of Physics-Condensed Matter, Vol. 16  pp. S5541  -  S5548, 2004.
  36. M. Debnath, V. Zayets, and K. Ando " Highly efficient (Cd,Mn)Te waveguide for integrated magneto-optical isolator ", Transactions of the Magnetic Society of Japan, vol. 4-2, pp.339-343, 2004.
  37. H. Saito, V. Zayets, S. Yamagata , and K. Ando "Room-temperature ferromagnetism in II-VI diluted magnetic semiconductor Zn1-xCrxTe", Physical Review Letters, vol. 90, pp. 207202(1-4), 2003.
  38. H. Saito, V. Zayets, S. Yamagata, and K. Ando "Room-temperature ferromagnetism in high Cr-doped II-VI diluted magnetic semiconductor Zn1-xCrxTe", Journal of Applied Physics, vol. 93, pp. 6796-6798, 2003.
  39. V. Zayets, R. Akimoto, H. Saito, and K. Ando, "Diluted magnetic semiconductors for magneto-optical applications", Transactions of the Magnetic Society of Japan, vol. 2-4, pp.131-135, 2002 (Invited Review Paper).
  40. V. Zayets and K. Ando "Amorphous Zn predeposition for growth of low-defect-density CdTe films and low- optical- loss Cd1-xMnxTe magneto-optic waveguide on GaAs substrate", Journal of Crystal Growth, vol. 237-239 Part 2, pp. 1554-1558, 2002.
  41. V. Zayets, H. Saito, and K. Ando "Growth and properties of new III-V diluted magnetic semiconductor Ga1-xCrxAs" , Journal of Crystal Growth, vol. 237-239 Part 2, pp.1339-1343, 2002.
  42. H. Saito, V. Zayets, S. Yamagata, and K. Ando "Magneto-optical studies of ferromagnetism in the II-VI diluted magnetic semiconductor Zn1-xCrxTe", Physical Review B, vol. 66, pp. 081201(1- 4), 2002.
  43. H. Saito, V. Zayets, , S.Yamagata ,Y. Suzuki, and K. Ando "Ferromagnetism in II-VI diluted magnetic semiconductor (Zn,Cr)Te", Journal of Applied Physics, vol. 91, pp.8085-8087, 2002.
  44. V. Zayets, and K. Ando, "Magnetically Programmable Bistable Laser Diode With Ferromagnetic Layer", IEEE Photonics Technology Letters, vol. 13, pp.185-187, 2001.
  45. H. Saito, V. Zayets, R. Akimoto, and K. Ando, Y.Mishima, M.Tanaka "Magnetic and transport properties of III-V diluted magnetic semiconductor (Ga,Cr)As" , Journal of Applied Physics, vol. 89, pp.7392-7396, 2001.
  46. V. Zayets, and K. Ando"Magneto-optical mode conversion in Cd1-xMnxTe waveguide on GaAs substrate", , Applied Physics Letters, vol. 77, pp.1593-1595, 2000.
  47. W. Zaets and K. Ando "Optical waveguide isolator based on non-reciprocal loss/ gain of amplifier covered by ferromagnetic layer", , IEEE Photonics Technology Letters vol. 11, pp. 1012-1014, August 1999.
  48. W. Zaets, K.Watanabe, and K. Ando "Cd1-xMnxTe magnetooptical waveguide integrated on GaAs substrate", , Applied Physics Letters vol. 70, pp. 2508-2510, 1997.


    " Wave analysis of quasi-tm/te modes in magnetooptic wave-guides" Zaets V.I., Gayday Y., Solomko A., Optika i spektroskopiya vol. 77, pp. 79-84, 1994.
    "Optical waveguide mode of gyroanisotropical planar waveguide" A. Solomko, W. Zaets, O. Kolokoltsev, Optika i spektroskopiya vol. 71 n6, pp.1079-1083. 1991.

    "Magneto-Optical effects and electrical resistivity of La0.8-xBixSr0.2MnO3 films" Y.Yokoyama, K.Ando, M.Umeda, W.Zaets, N.Hirano, I.Solovyev, and Y.Suzuki, Journal of Physics IV France 7, C1-643, 1997.
    "CdxMnxTe magneto-optical waveguide for monolithical integration of optical isolator into optoelectronics curcuits" V. Zayets in "Magneto-Optical Materials for Photonics and Recordings" edited by K. Ando, W. Challenener, R. Gambino, M. Levy, MRS Symposium Proceedings, pp. 153-162, 2005.
    "Hybrid Semiconductor-Ferromagnetic" V. Zayets and K. Ando in "Magneto-Optical Materials for Photonics and Recordings" edited by K. Ando, W. Challenener, R. Gambino, M. Levy, MRS Symposium Proceedings, pp. 163-169, 2005.
    Ando, H. Saito, V. Zayets and M. C. Debnath "  Dilute magnetic semiconductor: New material development and problem. ", Materia (Japan) Vol. 43,  No. 6, pp.  480  -  484, 2004.

 

 

 

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