Zuerch Lab
ULTRAFAST MATERIALS CHEMISTRY AT BERKELEY
Zuerch Lab
ULTRAFAST MATERIALS CHEMISTRY AT BERKELEY

News Post
New pre-print: A solid-state high harmonic generation spectrometer with cryogenic cooling
Sep 7 2023

Solid-state high harmonic generation spectroscopy (sHHG) has emerged as a pivotal technique for delving into electronic structure, symmetry, and dynamics in condensed matter systems. In our latest manuscript, we introduce an advanced cryogenic sHHG spectrometer, uniquely designed with a vacuum chamber and a closed-cycle helium cryostat. With the aid of an in situ temperature probe, we’ve ascertained that the sample interaction region maintains cryogenic temperatures even during the application of high-intensity femtosecond laser pulses, which are responsible for generating high harmonics. Our approach paves the way for temperature-dependent sHHG measurements down to a few Kelvin. Such advancements in sHHG spectroscopy present a novel tool for investigating phases of matter that manifest at low temperatures, an area of particular intrigue for highly correlated materials.

Pre-print is available here: https://arxiv.org/abs/2309.01049

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