Kazuhiro Hane

Summary

Affiliation: Tohoku University
Country: Japan

Publications

  1. doi request reprint Ultra-small silicon waveguide coupler switch using gap-variable mechanism
    Yuta Akihama
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 19:23658-63. 2011
  2. doi request reprint Fabrication and characterization of freestanding circular GaN gratings
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai, Japan
    Opt Express 18:773-9. 2010
  3. doi request reprint Large area, freestanding GaN nanocolumn membrane with bottom subwavelength nanostructure
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 18:5504-11. 2010
  4. doi request reprint Phase-shifter using submicron silicon waveguide couplers with ultra-small electro-mechanical actuator
    Taro Ikeda
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 18:7031-7. 2010
  5. ncbi request reprint Fabrication and characterization of nanoscale resonant gratings on thin silicon membrane
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai, Japan
    Opt Express 17:4938-43. 2009
  6. doi request reprint Fabrication and characterization of subwavelength nanostructures on freestanding GaN slab
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 18:2940-5. 2010
  7. doi request reprint Micro fluorescent analysis system integrating GaN-light-emitting-diode on a silicon platform
    Hiroto Nakazato
    Department of Nanomechanics, Tohoku University, Sendai 980 0952, Japan
    Lab Chip 12:3419-25. 2012
  8. pmc Patterned growth of InGaN/GaN quantum wells on freestanding GaN grating by molecular beam epitaxy
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Nanoscale Res Lett 6:117. 2011
  9. ncbi request reprint A wavelength-selective add-drop switch using silicon microring resonator with a submicron-comb electrostatic actuator
    Kazunori Takahashi
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 16:14421-8. 2008
  10. ncbi request reprint Pitch-variable blazed grating consisting of freestanding silicon beams
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 17:4419-26. 2009

Collaborators

  • Yongjin Wang
  • Yoshiaki Kanamori
  • Tong Wu
  • Kazunori Takahashi
  • Hiroto Nakazato
  • Yuta Akihama
  • Taro Ikeda
  • Masaaki Okochi
  • Hiroko Kawaguchi
  • Akio Iwabuchi
  • Takahiro Yamasaki
  • Ryohei Hokari
  • Yasuo Kokubun

Detail Information

Publications13

  1. doi request reprint Ultra-small silicon waveguide coupler switch using gap-variable mechanism
    Yuta Akihama
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 19:23658-63. 2011
    ..The extension ratio of the switch output was 17 dB for the waveguide displacement of 300 nm...
  2. doi request reprint Fabrication and characterization of freestanding circular GaN gratings
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai, Japan
    Opt Express 18:773-9. 2010
    ..This work represents an important step in combining GaN-based active material with freestanding nanostructures for further increasing light-extraction efficiency...
  3. doi request reprint Large area, freestanding GaN nanocolumn membrane with bottom subwavelength nanostructure
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 18:5504-11. 2010
    ..The obtained structures also demonstrate the potential application for anti-reflective (AR) coating and GaN-Si hybrid microelectromechanical system (MEMS)...
  4. doi request reprint Phase-shifter using submicron silicon waveguide couplers with ultra-small electro-mechanical actuator
    Taro Ikeda
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 18:7031-7. 2010
    ..Phase-shift was measured in a Mach-Zehnder interferometer to be 3.0pi at the displacement of 1.0 mum at the voltage of 31 V. The dimension of the fabricated device is 50microm wide and 85microm long...
  5. ncbi request reprint Fabrication and characterization of nanoscale resonant gratings on thin silicon membrane
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai, Japan
    Opt Express 17:4938-43. 2009
    ..The resonant behavior of linear gratings agrees with the theoretical predication, and the polarization-independent responses of circular gratings are also experimentally demonstrated...
  6. doi request reprint Fabrication and characterization of subwavelength nanostructures on freestanding GaN slab
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 18:2940-5. 2010
    ..This work provides a very practical approach to fabricate freestanding nanostructures on the GaN-on-silicon system for further improving the light extraction efficiency...
  7. doi request reprint Micro fluorescent analysis system integrating GaN-light-emitting-diode on a silicon platform
    Hiroto Nakazato
    Department of Nanomechanics, Tohoku University, Sendai 980 0952, Japan
    Lab Chip 12:3419-25. 2012
    ..57 pA, 1.21 pA μM(-1) and 469 nM, respectively. From these results, a compact fluorescence analysis system is demonstrated...
  8. pmc Patterned growth of InGaN/GaN quantum wells on freestanding GaN grating by molecular beam epitaxy
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Nanoscale Res Lett 6:117. 2011
    ..This work provides a feasible way for further GaN-based integrated optics devices by a combination of GaN micromachining and epitaxial growth on a GaN-on-silicon substrate.PACS81.05.Ea; 81.65.Cf; 81.15.Hi...
  9. ncbi request reprint A wavelength-selective add-drop switch using silicon microring resonator with a submicron-comb electrostatic actuator
    Kazunori Takahashi
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 16:14421-8. 2008
    ..83 dB from that at 0V, and 55% of the intensity was transmitted to the drop port. The full-width-half-maximum bandwidth of the dropped light was 0.5 nm, corresponding to a Q-value of 3150...
  10. ncbi request reprint Pitch-variable blazed grating consisting of freestanding silicon beams
    Yongjin Wang
    Department of Nanomechanics, Tohoku University, Sendai 980 8579, Japan
    Opt Express 17:4419-26. 2009
    ....
  11. doi request reprint Fabrication of antireflection subwavelength gratings at the tips of optical fibers using UV nanoimprint lithography
    Yoshiaki Kanamori
    Department of Nanomechanics, Tohoku University, Sendai, Japan
    Opt Express 21:322-8. 2013
    ..The SWG with the period of 700 nm was fabricated at the tip of a single-mode optical fiber for optical communications system. The reflectance was decreased to less than 0.27% at measured wavelengths between 1460 nm and 1580 nm...
  12. doi request reprint Spherical silicon micromirrors bent by anodic bonding
    Tong Wu
    Department of Nanomechanics, Tohoku University, Sendai, Japan
    Opt Express 19:11897-905. 2011
    ..4mm-1.6mm). The fabricated micromirrors are also used as the mold for replication of micro polymeric lenses. The surface profiles of the micromirrors are transferred to the polymeric replica with a high accuracy...
  13. doi request reprint Fabrication of a high-precision spherical micromirror by bending a silicon plate with a metal pad
    Tong Wu
    Department of Nanomechanics, Tohoku University, Sendai, Japan
    Appl Opt 50:5321-8. 2011
    ..This novel approach opens possibilities for fabricating a smooth surface for micromirror and microlens applications...