Tilted pulse front pumping techniques for efficient terahertz pulse generation

György Tóth; Gyula Polónyi; János Hebling

doi:10.1038/s41377-023-01293-1

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Tilted pulse front pumping techniques for efficient terahertz pulse generation

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- Tilted pulse front pumping techniques for efficient terahertz pulse generation
- Tilted pulse front pumping techniques for efficient terahertz pulse generation
- LSA 2023年12卷第11期页码：2291-2308
- Affiliations：
  
  1.University of Pécs, Pécs 7624, Hungary
  2.Szentágothai Research Centre, Pécs 7624, Hungary
  3.HUN-REN-PTE High-Field Terahertz Research Group, Pécs 7624, Hungary
- Author bio：
  
  János Hebling (hebling@fizika.ttk.pte.hu)
- Funds：
- DOI：10.1038/s41377-023-01293-1
  中图分类号：
- 纸质出版日期：2023-11-30，
  
  网络出版日期：2023-10-24，
  
  收稿日期：2023-05-31，
  
  修回日期：2023-09-08，
  
  录用日期：2023-09-21
- Accepted：
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Tilted pulse front pumping techniques for efficient terahertz pulse generation[J]. LSA, 2023,12(11):2291-2308.

Tóth, G., Polónyi, G. & Hebling, J. Tilted pulse front pumping techniques for efficient terahertz pulse generation. Light: Science & Applications, 12, 2291-2308 (2023).
Tilted pulse front pumping techniques for efficient terahertz pulse generation[J]. LSA, 2023,12(11):2291-2308. DOI： 10.1038/s41377-023-01293-1.

Tóth, G., Polónyi, G. & Hebling, J. Tilted pulse front pumping techniques for efficient terahertz pulse generation. Light: Science & Applications, 12, 2291-2308 (2023). DOI： 10.1038/s41377-023-01293-1.

摘要

Abstract

Optical rectification of femtosecond laser pulses has emerged as the dominant technique for generating single- and few-cycle terahertz (THz) pulses. The advent of the tilted pulse front pumping (TPFP) velocity matching technique

proposed and implemented two decades ago

has ushered in significant advancements of these THz sources

which are pivotal in the realm of THz pump-probe and material control experiments

which need THz pulses with microjoule energies and several hundred kV/cm electric field strengths. Furthermore

these THz sources are poised to play a crucial role in the realization of THz-driven particle accelerators

necessitating millijoule-level pulses with tens of MV/cm electric field strengths. TPFP has enabled the efficient velocity matching in lithium niobate crystals renowned for their extraordinary high nonlinear coefficient. Moreover

its adaptation to semiconductor THz sources has resulted in a two-hundred-times enhancement in conversion efficiency. In this comprehensive review

we present the seminal achievements of the past two decades. We expound on the conventional TPFP setup

delineate its scaling limits

and elucidate the novel generation TPFP configurations proposed to surmount these constraints

accompanied by their preliminary outcomes. Additionally

we provide an in-depth analysis of the THz absorption

refractive index

and nonlinear coefficient spectra of lithium niobate and widely used semiconductors employed as THz generators

which dictate their suitability as THz sources. We underscore the far-reaching advantages of tilted pulse front pumping

not only for LN and semiconductor-based THz sources but also for selected organic crystal-based sources and Yb-laser-pumped GaP sources

previously regarded as velocity-matched in the literature.

关键词

Keywords

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