Surface-emitted terahertz-wave generation by ridged periodically poled lithium niobate and enhancement by mixing of two terahertz waves

K Suizu; Y Suzuki; Y Sasaki; H Ito; Y Avetisyan

doi:10.1364/ol.31.000957

Surface-emitted terahertz-wave generation by ridged periodically poled lithium niobate and enhancement by mixing of two terahertz waves

Opt Lett. 2006 Apr 1;31(7):957-9. doi: 10.1364/ol.31.000957.

Authors

K Suizu¹, Y Suzuki, Y Sasaki, H Ito, Y Avetisyan

Affiliation

¹ Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan. suizu@riec.tohoku.ac.jp

PMID: 16599224
DOI: 10.1364/ol.31.000957

Abstract

Surface-emitted terahertz- (THz-) wave generation by difference-frequency mixing with ridge-shaped periodically poled lithium niobate (PPLN) was demonstrated. The PPLN had a ridge height of 300 microm, a thickness of 20 microm, and an interaction length of 35 mm. The ridge behaves as a slab waveguide for optical pump beams. The PPLN gives rise to THz waves in opposite directions, perpendicular to the pump-beam direction. Reflecting the THz wave on one side and overlapping it with the THz wave on the other side increased the total THz-wave intensity approximately 2.7 times compared with that without reflection and mixing.