[17a-M_110-1~13] 3.4 Laser system and materials

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17a-M_110-5] Fabrication of quasi-phase-matched GaAs multiple-plate structures for terahertz wave generation pumped with a CO₂ laser

〇(M1)Yuta Kuramoto¹, Hideaki Ikeura¹, Hiroaki Minamide², Ichiro Shoji¹ (1.Chuo Univ., 2.RIKEN)

Keywords:

room-temperature bonding,quasi-phase-matching,terahertz wave generation

We fabricated GaAs quasi-phase-matched (QPM) structures via room-temperature bonding for high-power CO₂ laser-pumped terahertz wave generation. By employing a Si substrate as a bonding base to suppress dust contamination, we achieved a low-loss 10-plate stack with an internal transmittance of 97.6% at a wavelength of 10.6 um (corresponding to a loss of 0.27% per interface). This approach successfully mitigated the transmittance degradation typically associated with stacking. Future work will involve further increasing the number of plates and conducting terahertz wave generation experiments.