[論文レビュー] Laser-driven few-cycle Terahertz sources with high average power

Robin Löscher, Tim Vogel+6 more|ArXiv.org|Jul 15, 2025

Terahertz technology and applications被引用数 3

ひとこと要約

この視点は、高出力のYb系超高速レーザーによって駆動されるブロードバンドなテラヘルツ源を論じ、ワットレベルの平均出力を達成するアプローチを強調し、課題と今後の研究展開を概説します。

ABSTRACT

Ultrafast laser-driven terahertz sources are gaining in popularity in an increasingly wide range of scientific and technological applications. However, many fields continue to be severely limited by the typically low average power of these sources, which restricts speed, signal-to-noise ratio, and dynamic range in numerous measurements. Conversely, the past two decades have seen spectacular progress in high average power ultrafast laser technology based on Ytterbium lasers, rendering hundreds of watts to kilowatts of average power available to this community to drive THz sources. This has opened the young field of high-average-power laserdriven THz time-domain spectroscopy, which holds the potential to revolutionize the applications of THz time-domain systems. In this perspective article, we discuss this young field and emphasize recent advancements in broadband terahertz sources utilizing high-power Yb-based ultrafast lasers as drivers, which are nearing watt-level average power. We discuss various approaches explored thus far, current challenges, prospects for scaling, and future research areas that will accelerate their implementation in applications.

研究の動機と目的

• Motivate the use of high-average-power ultrafast lasers to drive THz sources.
• Summarize recent advancements toward watt-level average power in THz generation.
• Identify challenges in scaling and integration for practical THz time-domain spectroscopy.
• Discuss prospective approaches and research directions to accelerate practical applications.

提案手法

• Review and synthesize recent developments in high-power Yb-based ultrafast laser drivers for THz generation.
• Compare different THz source approaches driven by high-power lasers.
• Discuss scaling prospects and practical implementation considerations for THz-TDS systems.

実験結果

リサーチクエスチョン

• RQ1 What are the current strategies to achieve high average power in laser-driven THz sources?
• RQ2 What are the main challenges limiting watt-level THz average power and how might they be overcome?
• RQ3 What prospects and research directions will accelerate the deployment of high-average-power THz-TDS systems?

主な発見

• High-power Yb-based ultrafast lasers enable approaching watt-level average power for THz sources.
• Broadband THz sources have been explored using these high-power drivers.
• The article highlights scaling prospects and remaining challenges for practical THz time-domain spectroscopy applications.