Details

Autor(en) / Beteiligte

• Li, Zhong-Yang
• Zhao, Jia
• Yuan, Sheng
• Jiao, Bin-Zhe
• Bing, Pi-Bin
• Zhang, Hong-Tao
• Chen, Zhi-Liang
• Tan, Lian
• Yao, Jian-Quan

Titel

Creation of multi-frequency terahertz waves by optimized cascaded difference frequency generation

Ist Teil von

• Chinese physics B, 2022-03, Vol.31 (4), p.44205-407

Ort / Verlag

Chinese Physical Society and IOP Publishing Ltd

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A new scheme which generates multi-frequency terahertz (THz) waves from planar waveguide by the optimized cascaded difference frequency generation (OCDFG) is proposed. A THz wave with frequency ω T1 is generated by the OCDFG with two infrared pump waves, and simultaneously a series of cascaded optical waves with a frequency interval ω T1 is generated. The THz wave with a frequency of M -times ω T1 is generated by mixing the m -th-order and the ( m + M )-th-order cascaded optical wave. The phase mismatch distributions of cascaded difference frequency generation (CDFG) are modulated by changing the thickness of planar waveguide step by step, thereby satisfying the phase-matching condition from first-order to high-order cascaded Stokes process step by step. As a result, the intensity of THz wave can be enhanced and modulated by controlling the cascading order of OCDFG.