Lateral terahertz emission from shaped plasma excited by colliding laser pulses.

• Tác giả: Yuxuan Chen, Chenyin Dai, Jianming Dai, Xiangyu La, Zhen Tian
• Ngôn ngữ: eng
• Ký hiệu phân loại: 133.594 Types or schools of astrology originating in or associated with a
• Thông tin xuất bản: United States : Optics letters , 2025
• Bộ sưu tập: NCBI
• ID: 707418

Tóm tắt

Plasma-based terahertz (THz) sources are generally limited by a saturation effect and consequent optical-THz conversion efficiency. Extending plasma volume is an effective approach to mitigate the saturation effect and increase THz generation efficiency. By reshaping gas plasma using two pairs of cylindrical lens to focus two counter-propagating laser pulses, we demonstrate enhanced broadband coherent THz radiation through the interaction of colliding laser pulses with gas plasma. The use of the cylindrical lens pairs changes the plasma shape to mitigate the THz saturation and increase the THz generation efficiency. The peak THz amplitude generated by cylindrical lens pairs is more than twice of that by spherical lenses. This method provides an important option for the development of promising terahertz sources.