Watanabe Research Group

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What's new

Apr. 1, 2016Paper
One paper was published in year 2015
(1) K. Shibata, M. Takai, M. Uemoto, and S. Watanabe
"Intrinsic formation of electromagnetic divergence and rotation by parabolic focusing."
Phys. Rev. A 92, 053806 (8 pages) (2015).
Apr. 1, 2015Paper
Three papers were published in 2014!
(1) K. Oguchi, N. Yasumatsu, and S. Watanabe, "Polarization detection of terahertz radiation via the electro-optic effect using zinc-blende crystal symmetry," J. Opt. Soc. Am. B 31, 3170-3180 (2014).
(2) M. Takai, M. Takeda, M. Sasaki, T. Tachizaki, N. Yasumatsu, and S. Watanabe, "Video-rate terahertz electric-field vector imaging," Appl. Phys. Lett. 105, 151103 (2014).
(3) N. Yasumatsu, A. Kasatani, K. Oguchi, and S. Watanabe,
"High-speed terahertz time-domain polarimeter based on an electro-optic modulation technique," Appl. Phys. Express 7, 092401 (2014).
Oct. 22, 2013Paper
Mathematical and experimental verifications of the robustness of the spinning EO sensor method is published.
Naoya Yasumatsu and Shinich Wanatabe, "Robustness of electric field vector sensing of electromagnetic waves by analyzing crystal angle dependence of the electro-optic effect," J. Opt. Soc. Am. B 30, 2940-2951 (2013).
March 11, 2013Paper
A real-time Terahertz time-domain oolarization analyzer with high repetition-rate femtosecond laser pulses is published.
Shinichi Watanabe, Naoya Yasumatsu, Kenichi Oguchi, Masatoshi Takeda, Takeshi Suzuki, and Takehiro Tachizaki
"Real-time terahertz time-domain polarization analyzer with 80-MHz repetition-rate femtosecond laser pulses."
Sensors 13, 3299-3312 (2013).
Oct. 19, 2012News
Video for an introduction of our laboratory is now open.
"Development of ultra-highly precise terahertz measurement technology."

July 6, 2012Paper
A review article about nonlinear terahertz responses in carbon nanotubes is published.
Ryo Shimano, Shinichi Watanabe, and Ryusuke Matsunaga,
"Intense terahertz pulse-induced nonlinear responses in carbon nanotubes,"
JIMT 33, 861-869 (2012).
May 21, 2012Paper
Substantial improvement of the axial resolution of the terahertz surface topography imaging is achieved by the precise polarization measurements.
Naoya Yasumatsu, and Shinichi Watanabe,
"T-ray topography by time-domain polarimetry,"
Opt. Lett. 37, 2706-2708 (2012).
Feb. 16, 2012Paper
New experimental scheme to determine the polarization direction of terahertz pulses are demonstrated.
Naoya Yasumatsu, and Shinichi Watanabe,
"Precise real-time polarization measurement of terahertz electromagnetic waves by a spinning electro-optic sensor,"
Rev. Sci. Instrum. 83, 023104 (2012).
April 2, 2012News
English pages are open.