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13 March 2023 Precision excitation of multicycle THz radiation using modular pulse trains
Nicholas Matlis, Zhelin Zhang, Ümit Demirbas, Christian Rentschler, Mikhail Pergament, Koustouban Ravi, Franz X. Kärtner
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Proceedings Volume PC12420, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVI; PC124200E (2023) https://doi.org/10.1117/12.2650059
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
We demonstrate efficient generation of terahertz radiation (THz) by nonlinear down-conversion driven by trains of pulses of tunable duration, spacing, amplitude and number. The optical setup, based on cascaded interferometers, provides fine control over the pulse train parameters allowing precise control over the conversion efficiency of the process as well as over the THz frequency and pulse duration. Our approach enables thorough optimization of the conversion process, which theory predicts can reach multiple percent. We perform experiments and simulations of THz generation in periodically-poled lithium niobate and KTP to validate theory and determine conversion-efficiency limitations in a highly-optimized scenario.
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Nicholas Matlis, Zhelin Zhang, Ümit Demirbas, Christian Rentschler, Mikhail Pergament, Koustouban Ravi, and Franz X. Kärtner "Precision excitation of multicycle THz radiation using modular pulse trains", Proc. SPIE PC12420, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVI, PC124200E (13 March 2023); https://doi.org/10.1117/12.2650059
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KEYWORDS
Terahertz radiation
Electrons
Ferroelectric materials
Interferometers
Laser damage threshold
Lithium niobate
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