Abstract-Coherent time-domain detection of terahertz pulses generated from noncollinear phase-matched, picosecond terahertz parametric oscillator

Yuzuru Tadokoro1, Yuma Takida2, Hiroshi Kumagai3, Shigeki Nashima4 and Masanori Hangyo1

http://iopscience.iop.org/1882-0786/7/2/022701/pdf/1882-0786_7_2_022701.pdf
tadokoro-y@ile.osaka-u.ac.jp

1 Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
2 Tera-Photonics Laboratory, RIKEN Center for Advanced Photonics, Sendai 980-0845, Japan
3 Graduate School of Medical Sciences, Kitasato University, Sagamihara 252-0373, Japan
4 Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan
 

Yuzuru Tadokoro et al 2014 Appl. Phys. Express 7 022701. doi:10.7567/APEX.7.022701
Received 30 October 2013, accepted for publication 6 December 2013. Published 6 January 2014.
© 2014 The Japan Society of Applied Physics

With a photoconductive antenna, we demonstrate time-domain detection of terahertz (THz) pulses generated from a noncollinear phase-matched, picosecond THz parametric oscillator. Since time-domain detection enables us to detect THz waves sensitively, the dynamic range of the power spectrum is ~1000 times improved in comparison with that of a pyroelectric detector. Furthermore, multiple THz pulses are observed because of the time delay between arrayed Si prism couplers. When a single, larger Si prism coupler or a trapezoidal MgO:LN crystal is employed instead, single monocycle THz pulses are observed.