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arXiv · 2309.01049

A solid-state high harmonic generation spectrometer with cryogenic cooling

Finn Kohrell·Bailey R. Nebgen·Jacob A. Spies·Richard Hollinger·Alfred Zong·Can Uzundal·Christian Spielmann·Michael Zuerch
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Abstract

Solid-state high harmonic generation spectroscopy (sHHG) is a promising technique for studying electronic structure, symmetry, and dynamics in condensed matter systems. Here, we report on the implementation of an advanced sHHG spectrometer based on a vacuum chamber and closed-cycle helium cryostat. Using an in situ temperature probe, it is demonstrated that the sample interaction region retains cryogenic temperature during the application of high-intensity femtosecond laser pulses that generate high harmonics. The presented implementation opens the door for temperature-dependent sHHG measurements down to few Kelvin, which makes sHHG spectroscopy a new tool for studying phases of matter that emerge at low temperatures, which is particularly interesting for highly correlated materials.

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Finn Kohrell, Bailey R. Nebgen, Jacob A. Spies, Richard Hollinger, Alfred Zong, Can Uzundal, Christian Spielmann, Michael Zuerch. 2023-09-03. A solid-state high harmonic generation spectrometer with cryogenic cooling. https://doi.org/10.1063/5.0174407

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