RIKEN intense terahertz-wave source and sensitive detection

2017. június 02., 12:09

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Hiroaki Minamide (RIKEN Center for Advanced Photonics) - RIKEN intense terahertz-wave source and sensitive detection
c. előadására

Helyszín: PTE-TTK A/421 előadóterem
Időpont: 2017. június. 9., péntek. 10.00

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Hiroaki Minamide: RIKEN intense terahertz-wave source and sensitive detection



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.