ACHIEVEMENTS

Journals

  1. H. Homma, M. R. Akram, A. A. Fathnan, J. Lee, C. Christopoulos, and H. Wakatsuchi, “Anisotropic Impedance Surfaces Activated by Incident Waveform,” Nanophotonics (accepted). Link
  2. T. Nakasha, S. Phang, and H. Wakatsuchi, “Pseudo-Waveform-Selective Metasurfaces and Their Limited Performance,” Adv. Theory Simul., vol. 4, no. 1, pp. 2000187, 2021. Link
  3. R. Aihara and H. Wakatsuchi, “Metasurfaces for Efficient Digital Noise Absorption,” Sci. Rep., vol. 10, p. 17101, 2020. Link
  4. M. Tanikawa, D. Ushikoshi, K. Asano, K. Sanji, M. Ikeda, D. Anzai, and H. Wakatsuchi, “Metasurface Sensing Difference in Waveforms at the Same Frequency with Reduced Power Level,” Sci. Rep., vol. 10, p. 14283, 2020. Link
  5. K. Asano*, T. Nakasha*, and H. Wakatsuchi, “Simplified Equivalent Circuit Approach for Designing Time-Domain Responses of Waveform-Selective Metasurfaces,” Appl. Phys. Lett., vol. 116, p. 171603, 2020 (*contributed equally). Link
  6. D. Ushikoshi, M. Tanikawa, K. Asano, K. Sanji, M. Ikeda, D. Anzai, and H. Wakatsuchi, “Experimental Demonstration of Waveform-Selective Metasurface Varying Wireless Communication Characteristics at the Same Frequency Band of 2.4 GHz,” Electron. Lett., vol. 56, no. 3, pp.160-162, 2020. Link
  7. H. Wakatsuchi, “Numerical Demonstration of Non-Reciprocal Waveform-Selective Metasurfaces,” Electron. Lett., vol. 55, no. 6, pp. 312–314, 2019. Link
  8. H. Wakatsuchi, J. Long, and D. Sievenpiper, “Waveform Selective Surfaces,” Adv. Funct. Mater., vol. 29, no. 11, p. 1806386, 2019 (Selected as a Video Abstract Link). Link
  9. A. Li*, Z. Luo*, H. Wakatsuchi*, S. Kim*, and D. Sievenpiper, “Nonlinear, Active, and Tunable Metasurfaces for Advanced Electromagnetics Applications,” IEEE Access, vol. 5, pp. 27439-27452, 2017 (invited) (*: equal contribution). Link
  10. H. Wakatsuchi, D. F. Sievenpiper, and C. Christopoulos, “Designing Flexible and Versatile Metamaterial Absorbers,” IEEE EMC Magazine, vol. 5, no. 2, pp. 76-82, 2016 (invited). Link
  11. H. Wakatsuchi, F. Gao, S. Yagitani, and D. F. Sievenpiper, “Responses of Waveform-Selective Absorbing Metasurfaces to Oblique Waves at the Same Frequency,” Sci. Rep., vol. 6, p. 31371, 2016. Link
  12. H. Wakatsuchi, D. Anzai, and C. Smartt, “Visualization of Field Distributions of Waveform-Selective Metasurface,” IEEE Antennas Wirel. Propag. Lett., vol. 15, pp. 690–693, 2016. Link
  13. S. Kim, H. Wakatsuchi, J. J. Rushton, and D. F. Sievenpiper, “Switchable nonlinear metasurfaces for absorbing high power surface waves,” Appl. Phys. Lett., vol. 108, no. 4, p. 041903, Mar. 2016. Link
  14. H. Wakatsuchi, “Time-Domain Filtering of Metasurfaces,” Sci. Rep., vol. 5, p. 16737, 2015. Link
  15. F. Gao, F. Zhang, H. Wakatsuchi, and D. F. Sievenpiper, “Synthesis and Design of Programmable Subwavelength Coil Array for Near-Field Manipulation,” IEEE Trans. Microw. Theory Tech., vol. 63, no. 9, pp. 2971–2982, 2015. Link
  16. H. Wakatsuchi, “Waveform-selective metasurfaces with free-space wave pulses at the same frequency,” J. Appl. Phys., vol. 117, no. 16, p. 164904, 2015. Link
  17. H. Wakatsuchi, D. Anzai, J. J. Rushton, F. Gao, S. Kim, and D. F. Sievenpiper, “Waveform Selectivity at the Same Frequency,” Sci. Rep., vol. 5, p. 9639, 2015 (Highlighted by Yomiuri Shimbun and other 3 newspapers). Link
  18. H. Wakatsuchi, S. Kim, J. J. Rushton, and D. F. Sievenpiper, “Waveform-dependent absorbing metasurfaces,” Phys. Rev. Lett., vol. 111, no. 24, p. 245501, 2013 (Highlighted by Nature, 505, 490-491, 2014 Link and Asahi Shimbun.). Link
  19. H. Wakatsuchi, J. J. Rushton, J. Lee, F. Gao, M. Jacob, S. Kim, and D. F. Sievenpiper, “Experimental demonstration of nonlinear waveform-dependent metasurface absorber with pulsed signals,” Electron. Lett., vol. 49, no. 24, pp. 1530–1531, 2013 (Selected as a featured article). Link
  20. H. Wakatsuchi, S. Kim, J. J. Rushton, and D. F. Sievenpiper, “Circuit-based nonlinear metasurface absorbers for high power surface currents,” Appl. Phys. Lett., vol. 102, no. 21, p. 214103, 2013. Link
  21. H. Wakatsuchi, T. Sakai, S. Watanabe, M. Kojima, Y. Yamashiro, H. Sasaki, K. Sasaki, and O. Hashimoto, “Application of Reproducible Measurements of Complex Permittivities to Crystalline Lens From 500 MHz to 50 GHz,” IEEE Trans. Electromagn. Compat., vol. 54, no. 6, pp. 1298–1301, 2012. Link
  22. H. Wakatsuchi, J. Paul, and C. Christopoulos, “Performance of customizable cut-wire-based metamaterial absorbers: Absorbing mechanism and experimental demonstration,” IEEE Trans. Antennas Propag., vol. 60, no. 12, pp. 5743–5752, 2012. Link
  23. H. Wakatsuchi, J. Paul, S. Greedy, and C. Christopoulos, “Cut-wire metamaterial design based on simplified equivalent circuit models,” IEEE Trans. Antennas Propag., vol. 60, no. 8, pp. 3670–3678, 2012. Link
  24. H. Wakatsuchi and C. Christopoulos, “Generalized scattering control using cut-wire-based metamaterials,” Appl. Phys. Lett., vol. 98, no. 22, p. 221105, 2011. Link
  25. H. Wakatsuchi, S. Greedy, C. Christopoulos, and J. Paul, “Customised broadband metamaterial absorbers for arbitrary polarisation,” Opt. Express, vol. 18, no. 21, pp. 22187–22198, 2010. Link
  26. H. Wakatsuchi, S. Greedy, J. Paul, and C. Christopoulos, “Efficient modelling method for artificial materials using digital filtering techniques and emc applications,” IEICE Trans. Commun., vol. E93-B, no. 7, pp. 1760–1767, 2010. Link
  27. H. Wakatsuchi, M. Hanazawa, S. Watanabe, A. Nishikata, M. Kouzai, M. Kojima, Y. Yamashiro, K. Sasaki, and O. Hashimoto, “The Measurements of the Complex Permittivities of Blood Samples in Quasi-Millimeter Wave Bands,” IEICE Trans. Commun., vol. E90-B, no. 6, pp. 1357–1359, 2007. Link

Conferences

  1. H. Homma, J. Lee, and H. Wakatsuchi, "Anisotropic Waveform-Selective Metasurfaces," XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science, pp. Tu-FIP-B22-15, Rome, Italy, 28 Aug. - 4 Sept. 2021.
  2. H. Takeshita, D. Nita, and H. Wakatsuchi, "Multi-Band Waveform-Selective Metasurfaces and Their Application," XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science, pp. Tu-FIP-D10-2, Rome, Italy, 28 Aug. - 4 Sept. 2021.
  3. R. Higashiura and H. Wakatsuchi, "Reconfigurable Antennas Based on Waveform-Selective Metasurfaces," XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science, pp. Tu-FIP-D10-3, Rome, Italy, 28 Aug. - 4 Sept. 2021.
  4. H. Wakatsuchi and M. Tanikawa, "Transient Wavefront Shaping Based on Waveform-Selective Metasurface," XXXIV General Assembly and Scientific Symposium of the International Union of Radio Science, pp. Tu-FIP-D10-4, Rome, Italy, 28 Aug. - 4 Sept. 2021.
  5. H. Wakatsuchi, R. Higashiura, H. Takeshita, and D. Nita, "Multi-Band Waveform-Selective Metasurfaces Transmitting Continuous Waveforms Based on More Than One Frequency," Metamaterials'2020 the 14th International Congress on Artificial Materials for Novel Wave Phenomena, pp. X-284-X-286, New York, US, 28 Sept. - 3 Oct. 2020.
  6. H. Wakatsuchi, D. Ushikoshi, S.M. Mahmood, R. Higashiura, C. Smartt, and C. Christopoulos, "Antenna Applications Based on Waveform-Selective Metasurfaces Varying Time-Domain Responses at the Same Frequency," Metamaterials'2019 the 13th International Congress on Artificial Materials for Novel Wave Phenomena, pp. X-459-X-461, Rome, Italy, 16-21 Sept. 2019.
  7. M. Tanikawa, K. Asano, D. Ushikoshi, K. Sanji, M. Ikeda, D. Anzai, and H. Wakatsuchi, "Waveform-Selective Metasurfaces Responding to Low-Power Signals," Progress In Electromagnetics Research Symposium, Toyama, Japan, August 2018.
  8. T. Nakasha, K. Asano, D. Ushikoshi, J. Long, D.F. Sievenpiper, and H. Wakatsuchi, "Ultra-Broadband Metasurface Absorbers," Progress In Electromagnetics Research Symposium, Toyama, Japan, August 2018.
  9. D. Nita, K. Asano, D. Ushikoshi, and H. Wakatsuchi, "Design of Dual-Band Waveform-Selective Metasurfaces," Progress In Electromagnetics Research Symposium, Toyama, Japan, August 2018.
  10. H. Wakatsuchi and D.F. Sievenpiper, "Waveform-Selective Absorbing Metasurfaces," Progress In Electromagnetics Research Symposium, Toyama, Japan, August 2018 (invited).
  11. D. Ushikoshi, K. Asano, K. Sanji, M. Ikeda, D. Anzai, and H. Wakatsuchi, "Response of Waveform-Selective Metasurfaces to Wi-Fi Signals," Progress In Electromagnetics Research Symposium, Toyama, Japan, August 2018.
  12. K. Asano and H. Wakatsuchi, "Application of Waveform-Selective Metasurfaces to Electromagnetic Interference Issues," Progress In Electromagnetics Research Symposium, Toyama, Japan, August 2018.
  13. K. Asano and H. Wakatsuchi, "Time-Domain Responses of Waveform-Selective Metasurfaces," IEEE APS/URSI 2018, pp. 1477-1478, Boston, US, July 2018.
  14. D. Ushikoshi and H. Wakatsuchi, "Metasurfaces to Control Direction of Wave Propagation at the Same Frequency," IEEE APS/URSI 2018, pp. 1891-1892, Boston, US, July 2018.
  15. H. Wakatsuchi and D.F. Sievenpiper, "Waveform-Selective Scattering Control through Circuit-Based Metasurfaces at the Same Frequency," IEEE APS/URSI 2017, pp. 67-68, San Diego, US, July 2017.
  16. H. Wakatsuchi and C. Smartt, "Field Visualisation of waveform-selective metasurfaces," Metamaterials'2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, Oxford, UK, 7-10 Sept. 2015.
  17. D. Sievenpiper, R. Quarfoth, H. Wakatsuchi, Z. Luo, "Nonlinear, Active, and Anisotropic Impedance Surfaces", 9th European Conference on Antennas and Propagation, Lisbon, Portugal, April, 2015. 
  18. H. Wakatsuchi, J. Rushton, S. Kim, D. Sievenpiper, “Metasurfaces to select waveforms at the same frequency,” 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, pp. 286-288, Copenhagen, Denmark, Aug. 2014.
  19. S. Kim, H. Wakatsuchi, J. J. Rushton, and D. F. Sievenpiper, “Nonlinear metamaterial surfaces for absorption of high power microwave surface currents,” 2013 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Orlando, FL, July 2013.
  20. H. Wakatsuchi, S. Kim, J. J. Rushton, and D. F. Sievenpiper, “Numerical and experimental demonstration of nonlinear metamaterial surfaces designed for high power surface current absorption,” Metamaterials'2012 Sixth International Congress on Advanced Electromagnetic Materials in Microwave and Optics, pp. 514–516, St. Petersburg, Russia, Sep. 2012.
  21. H. Wakatsuchi, J. Paul, S. Greedy, and C. Christopoulos, “Performance enhancement of cut–wire–based metamaterial absorbers,” Metamaterials'2011 Fifth International Congress on Advanced Electromagnetic Materials in Microwave and Optics, pp. 555–557, Barcelona, Spain, Oct. 2011.
  22. J. Paul, S. Greedy, H. Wakatsuchi, and C. Christopoulos, “Measurements and Simulations of Enclosure Damping Using Loaded Antenna Elements,” EMC Europe 2011, pp. 676–679, York, U.K., Sep. 2011.
  23. H. Wakatsuchi, J. Paul, S. Greedy, and C. Christopoulos, “Contribution of Conductive loss to Cut–Wire Metamaterial Absorbers,” AP-RASC'10 2010 Asia-Pacific Radio Science Conference, pp. DC1–7, Toyama, Japan, Sep. 2010.
  24. H. Wakatsuchi and J. Paul, “Predictions of Resonant Frequency Shifts in Asymmetrical Cut–Wire Metamaterials,” Metamaterials'2010 Fourth International Congress on Advanced Electromagnetic Materials in Microwave and Optics, pp. 881–883, Karlsruhe, Germany, Sep. 2010.
  25. C. Christopoulos, J. D. Paul, D. W. P. Thomas, S. Greedy, H. Wakatsuchi, and M. H. Alsadi, “Characterisation and modelling of materials for electromagnetic shielding,” UK Magnetic Society Electromagnetic Field Protection, Abingdon, U.K., Apr. 2010.
  26. H. Wakatsuchi, S. Greedy, J. Paul, and C. Christopoulos, “Implementation of Digital Filtering Techniques to EBG structures and Metamaterials for Efficient Numerical Simulations,” UK URSI Festival of Radio Science, Birmingham, U.K., Dec. 2009.
  27. H. Wakatsuchi, S. Greedy, J. Paul, and C. Christopoulos, “Efficient Modelling of Band–gap and Metamaterial Structures in EMC,” 2009 International Symposium Electromagnetic Compatibility Kyoto, pp. 745–748, Kyoto, Japan, July 2009.
  28. T. Sakai, M. Hanazawa, H. Wakatsuchi, A. Nishikata, and O. Hashimoto, “Measurements of Dielectric Properties of Biological Tissues in Mm–wave Band by Free–space Reflection Method, Ellipsometry Method and Coaxial Probe Method,” Progress in Electromagnetics Research Symposium (PIERS) 2007, pp. 45, Prague, Czech Republic, Aug. 2007.
  29. H. Wakatsuchi, M. Hanazawa, T. Sakai, S. Watanabe, M. Kojima, Y. Yamashiro, K. Sasaki, and O. Hashimoto, “Complex Permittivities Measurements of Ocular Tissues in Quasi-Millimeter and Millimeter Wave Bands,” BEMS The Bioelectromagnetics Society 29th Annual Meeting, pp. 497–499, Kanazawa, Japan, June 2007.
  30. H. Wakatsuchi, M. Hanazawa, T. Sakai, S. Watanabe, M. Kojima, Y. Yamashiro, K. Sasaki, and O. Hashimoto, “The Complex Permittivities of Ocular Tissues at Millimeter-Wave Bands,” EBEA 2007 The European Bioelectromagnetics Association, pp. 56, Bordeaux, France, Apr. 2007.
  31. H. Wakatsuchi, M. Hanazawa, T. Sakai, S. Watanabe, M. Kojima, Y. Yamashiro, K. Sasaki, and O. Hashimoto, “Complex Permittivities Measurements of Eye Tissues in Quasi-millimeter Wave Band,” 2006 KMU Workshop on Ocular changes Induced by Electromagnetic Waves, Kanazawa, Japan, Dec. 2006.
  32. H. Wakatsuchi, M. Hanazawa, S. Watanabe, M. Kouzai, A. Nishikata, and O. Hashimoto, “Complex Permittivity Measurement of Blood in Millimeter Wave Band,” Progress in Electromagnetics Research Symposium (PIERS) 2006, pp. 127, Tokyo, Japan, Aug. 2006.
  33. M. Kouzai, A. Nishikata, H. Wakatsuchi, K. Fukunaga, M. Hanazawa, and S. Watanabe, “Complex Permittivity Measurement of Some Biological Materials at 33–50GHz by Dielectric Tube Method,” BEMS 28th Annual Meeting, pp. 312–316, Cancun, Mexico, June 2006.
  34. M. Hanazawa, H. Wakatsuchi, S. Watanabe, M. Kouzai, A. Nishikata, and O. Hashimoto, “Complex Permittivity Measurement of Blood by Probe Method,” BEMS 28th Annual Meeting, pp. 93–96, Cancun, Mexico, June 2006.
  35. H. Wakatsuchi, M. Hanazawa, S. Watanabe, A. Nishikata, M. Kozai, M. Kojima, Y. Yamashiro, K. Sasaki, and O. Hashimoto, “Complex Permittivity Measurement of Biological Tissues and Numerical Analysis of SAR Distribution in Quasi–Millimeter Wave Band,” 2nd Pan-Pacific EMC Joint Meeting PPEMC'06, Okayama, Japan, May 2006.