Narrowband THz generation in nonlinear molecular crystals

Sinko, A.

Автор: Sinko A.
Сборник: 2022 International Conference on Advanced Laser Technologies (ALT'22)
Серия: Conference ALT
Тезисы
Год издания: 2022
Место издания: Сборник трудов конференции «International Conference on Advanced Laser Technologies (ALT)»
Первая страница: 221
Последняя страница: 221
DOI: 10.24412/CL-35039-2022-22-221-221
Аннотация: In the past years multicycle terahertz sources became very demanded in different fields of photonics, some of the main of which are: creating compact and convenient table-top free-electron lasers, where THz frequency range paves a way to higher field strength for electron acceleration and deceleration with significant excess of damage threshold depending on central frequency and pulse duration; developing narrowband sources for the efficiency and frequency resolution increase in THz nonlinear generation physics and resonant nonlinear spectroscopy. The most constructively convenient way to generate THz radiation is a nonlinear source usage. Certain molecular crystals have resonant phonon modes falling in the low-THz frequency range. Despite a widespread point of view that low-energy phonons negatively affect the generation of THz radiation, since first order and second order susceptibilities are affected by the high Q-factor phonon resonances, we can tune the conditions in such a way that the nonlinear conversion efficiency will be extremely high and noncritical phase matching conditions will be achieved only in a narrow spectral region around the phonon peaks.
Добавил в систему: Синько Антон Сергеевич

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