Imaging-free tilted-pulse-front-pumped lithium niobate source for high-energy terahertz pulse generation.

Authors

Gergő Krizsán, Bálint Jurasits, Zoltán Tibai, Szabolcs Turnár, Márk Aladi, Miklós Á Kedves, László Pálfalvi, János Hebling

Published in

Optics letters. Volume 51. Issue 15. Pages 4372-4375. Aug 01, 2026.

Abstract

A new, to the best of our knowledge, type of terahertz pulse source is introduced and demonstrated, employing a volume phase holographic grating in direct contact with a nonlinear material requiring a large pulse front tilt angle-e.g., lithium niobate or lithium tantalate-and another transmission grating, which pre-tilts the pump pulse front. The setup enables a significant reduction in the wedge angle (to <50% of conventional tilted-pulse-front-pumped setups) while eliminating the need for imaging optics. Consequently, significantly larger useful pump sizes and pump energies can be used, resulting in higher THz energy. In the absence of imaging, the pulse lengthening at the edges of the pump beam is strongly reduced, resulting in a substantial increase in the conversion efficiency (∼1.5×) in comparison to the conventional tilted-pulse-front setup.

PMID:
42537192
Bibliographic data and abstract were imported from PubMed on 01 Aug 2026.

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