ELFT HÍRADÓ

[Zoltan Tibai <tibai AT fizika.ttk.pte.hu>]

*A PTE TTK Fizikai **Intézet** meghívja*

*Hiroaki Minamide*

(RIKEN Center for Advanced Photonics)


RIKEN intense terahertz-wave source and sensitive detection

*c. előadására*


PTE TTK  A/421. előadó terem
2017. 06. 09. (péntek) 10:00


*Abstract:*

Terahertz (THz)-wave technology has gradually advanced on the basis of
nonlinear optics and ultra-fast photonics. Intense THz waves are generated
using a nonlinear optical crystal, especially LiNbO3. Recently, our studies
on injection-seeded THz-wave parametric source [1] show wavelength
tunability in the range from 0.8 THz to 4.7 THz with less than 5 GHz
linewidth. By using a trapezoidal crystal, the gain area of THz-wave
emission was extremely close to the crystal surface, which could
successfully reduce the THz-wave absorption by the crystal.

In inverse wavelength conversion, THz-wave photons are efficiently
converted into near-infrared photons, which provides sensitive THz-wave
detection at the attojoule level. Recently, THz-wave emission from a
resonant tunneling diode (RTD) has been detected by the nonlinear
up-conversion technique [2].



*Acknowledgements*

I would like to thank all the members of Tera-Photonics Research Team, RAP,
RIKEN, and research collaborators. This work was partially supported by
JSPS KAKENHI Grant Numbers 17H01282, 15K18079, 25220606, 26390106,
15K18080, 26246046, 26287067, and 25286075. We gratefully acknowledge
ImPACT Program of Council for Science, Technology and Innovation (Cabinet
Office, Government of Japan).



[1] S. Hayashi, K. Nawata, T. Taira, J. Shikata, K. Kawase, and H.
Minamide, "Ultrabright continuously tunable terahertz-wave generation at
room temperature," Scientific Reports, vol. 4, 05045, 2014.

[2] Y. Takida, K. Nawata, S. Suzuki, M. Asada, and H. Minamide,
"Terahertz-wave differential detection based on simultaneous
dual-wavelength up-conversion," AIP Advances, vol. 7, 035020, 2017.