caa a22 4500 445305908 CHVBK 20180317142613.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10762-010-9750-9 doi (NATIONALLICENCE)springer-10.1007/s10762-010-9750-9 Characteristics of the Beam-Steerable Difference-Frequency Generation of Terahertz Radiation [Elektronische Daten] [Ken-ichiro Maki, Takayuki Shibuya, Chiko Otani, Koji Suizu, Kodo Kawase] We have investigated the characteristics of a terahertz (THz) beam steering method based on a combination of difference-frequency generation (DFG) with the principle of the phased array antenna. In the DFG of THz radiation from a nonlinear optical crystal pumped by optical beams, the phase front of the THz radiation is indirectly tilted by adjusting the relative incidence angle between the pump beams to the crystal. A magnification of the steering angle with a factor of 193 is demonstrated as the most important effect provided by the method. The effect allows the use of a high-speed optical deflector for adjusting the incidence angle, accelerating the steering more than a hundred times compared with mechanical methods. The phase mismatching between the THz radiation and the pump beams as well as the refraction at the crystal surface limit the steering angle of the THz radiation to 56°, full width at half maximum. Springer Science+Business Media, LLC, 2010 Beam steering nationallicence Difference-frequency generation nationallicence Phased array antenna nationallicence Phase matching nationallicence Maki Ken-ichiro Terahertz Sensing and Imaging Laboratory, Advanced Science Institute, RIKEN, 519-1399 Aramaki-Aoba, Aoba-ku, 980-0845, Sendai, Miyagi, Japan aut Shibuya Takayuki Nagoya University, Furocho, Chikusa-ku, 464-8603, Nagoya, Aichi, Japan aut Otani Chiko Terahertz Sensing and Imaging Laboratory, Advanced Science Institute, RIKEN, 519-1399 Aramaki-Aoba, Aoba-ku, 980-0845, Sendai, Miyagi, Japan aut Suizu Koji Nagoya University, Furocho, Chikusa-ku, 464-8603, Nagoya, Aichi, Japan aut Kawase Kodo Nagoya University, Furocho, Chikusa-ku, 464-8603, Nagoya, Aichi, Japan aut Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/5(2011-05-01), 603-617 1866-6892 32:5<603 2011 32 10762 https://doi.org/10.1007/s10762-010-9750-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10762-010-9750-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maki Ken-ichiro Terahertz Sensing and Imaging Laboratory, Advanced Science Institute, RIKEN, 519-1399 Aramaki-Aoba, Aoba-ku, 980-0845, Sendai, Miyagi, Japan aut NATIONALLICENCE 700 1- Shibuya Takayuki Nagoya University, Furocho, Chikusa-ku, 464-8603, Nagoya, Aichi, Japan aut NATIONALLICENCE 700 1- Otani Chiko Terahertz Sensing and Imaging Laboratory, Advanced Science Institute, RIKEN, 519-1399 Aramaki-Aoba, Aoba-ku, 980-0845, Sendai, Miyagi, Japan aut NATIONALLICENCE 700 1- Suizu Koji Nagoya University, Furocho, Chikusa-ku, 464-8603, Nagoya, Aichi, Japan aut NATIONALLICENCE 700 1- Kawase Kodo Nagoya University, Furocho, Chikusa-ku, 464-8603, Nagoya, Aichi, Japan aut NATIONALLICENCE 773 0- Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/5(2011-05-01), 603-617 1866-6892 32:5<603 2011 32 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer