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Terahertz-slicing — an all-optical synchronization for 4 th generation light sources

2022; Optica Publishing Group; Volume: 30; Issue: 15 Linguagem: Inglês

10.1364/oe.454908

1094-4087

Min Chen, Thales V. A. G. de Oliveira, Igor Ilyakov, Tobias Nörenberg, Frederik Kuschewski, Jan‐Christoph Deinert, Nilesh Awari, Alexey Ponomaryov, Michael Kuntzsch, Susanne C. Kehr, Lukas M. Eng, Michael Gensch, Sergey Kovalev,

Semiconductor Quantum Structures and Devices

A conceptually new approach to synchronizing accelerator-based light sources and external laser systems is presented. The concept is based on utilizing a sufficiently intense accelerator-based single-cycle terahertz pulse to slice a thereby intrinsically synchronized femtosecond-level part of a longer picosecond laser pulse in an electro-optic crystal. A precise synchronization of the order of 10 fs is demonstrated, allowing for real-time lock-in amplifier signal demodulation. We demonstrate successful operation of the concept with three benchmark experiments using a 4th generation accelerator-based terahertz light source, i.e. (i) far-field terahertz time-domain spectroscopy, (ii) terahertz high harmonic generation spectroscopy, and (iii) terahertz scattering-type scanning near-field optical microscopy.