LN for single-cycle terahertz pulses amplitudes exceeding 1 MV/cm generated by optical rectification

1. Aperture size 5x5, 10x10 and 20x20mm
2. MgO doping level - 0.6%, 1% and 1.3%
3. AR coating for all different wavelength from 700nm to 1100 nm (800nm and 1030nm are most popular options).
For our records, can you indicate what kind of laser will be used with this crystal? Make/model, wavelength, pulse duration, pulse energy, rep rate?

Featured customer publication:
Single-cycle terahertz pulses with amplitudes exceeding 1 MV/cm generated by optical rectification in LiNbO3
H. Hirori 1,2, a), A. Doi 2,3, F. Blanchard 1,2, and K. Tanaka 1,2,4
1 Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
2 CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
3 Olympus Corporation, Hachioji-shi, Tokyo 192-8512, Japan
4 Department of Physics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan

Using the tilted-pump-pulse-front scheme, we generate single-cycle terahertz (THz) pulses by optical rectification of femtosecond laser pulses in LiNbO3. In our THz generation setup, the condition that the image of the grating coincides with the tilted-optical-pulse front is fulfilled to obtain optimal THz beam characteristics and pump-to-THz conversion efficiency. By using an uncooled microbolometer-array THz camera, it is found that the THz beam leaving the output face of the LN crystal can be regarded as a collimated rather than point source. The designed focusing geometry enables tight focus of the collimated THz beam with a spot size close to the diffraction limit, and the maximum THz electric field of 1.2 MV/cm is obtained.
We are grateful to Mitsuru Namiki for valuable discussions and also to Iwao Hosako and Kazuhiko Oda for letting us use the THz camera. This study was supported by a Grant-in-Aid for Scientific Research from JSPS (Grant No. 21760038) and from MEXT of Japan (Grant Nos. 18GS0208 and 20104007).