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  Hybrid CO2-Ti:sapphire laser with tunable pulse duration for mid-infrared-pump terahertz-probe spectroscopy

Budden, M., Gebert, T., & Cavalleri, A. (2020). Hybrid CO2-Ti:sapphire laser with tunable pulse duration for mid-infrared-pump terahertz-probe spectroscopy.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-7476-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-7477-1
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2011.11448.pdf (Preprint), 6MB
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2011.11448.pdf
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Downloaded from arxiv.org: 2020-11-25
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2020
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https://arxiv.org/abs/2011.11448 (Preprint)
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 Creators:
Budden, M.1, Author              
Gebert, T.1, Author              
Cavalleri, A.1, 2, Author              
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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 Abstract: Ultrafast optical excitation with intense mid-infrared and terahertz pulses has emerged as a new tool to control materials dynamically. As most experiments are performed with femtosecond pulse excitation, typical lifetimes of most light-induced phenomena in solids are of only few picoseconds. Yet, many scientific applications require longer drive pulses and lifetimes. Here, we describe a mid-infrared pump - terahertz-probe setup based on a CO2 laser seeded with 10.6 μm wavelength pulses from an optical parametric amplifier, itself pumped by a Ti:Al2O3 laser. The output of the seeded CO2 laser produces high power pulses of nanosecond duration, which are synchronized to the femtosecond laser. Hence, these pulses can be tuned in pulse duration by slicing their front and back edges with semiconductor-plasma mirrors irradiated by replicas of the femtosecond seed laser pulses. Variable pulse lengths from 5 ps to 1.3 ns are achieved, and used in mid-infrared pump, terahertz-probe experiments with probe pulses generated and electro-optically sampled by the femtosecond laser.

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Language(s): eng - English
 Dates: 2020-11-23
 Publication Status: Published online
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2011.11448
 Degree: -

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