TUNABLE NARROWBAND THZ PULSE GENERATION BY NON-COLLINEAR OPTICAL PARAMETRIC AMPLIFICATION
Access to this document is restricted. Some items have been embargoed at the request of the author, but will be made publicly available after the "No Access Until" date.
During the embargo period, you may request access to the item by clicking the link to the restricted file(s) and completing the request form. If we have contact information for a Cornell author, we will contact the author and request permission to provide access. If we do not have contact information for a Cornell author, or the author denies or does not respond to our inquiry, we will not be able to provide access. For more information, review our policies for restricted content.
Light-driven effects induced by phonon resonances in materials have attracted much attention in recent years. However, narrowband terahertz (THz) sources capable of driving single‐mode, coupled phonon resonances remain very scarce. Current THz generation schemes, whether based on nonlinear optics, quantum cascaded lasers, free electron lasers, or antennas, cannot simultaneously achieve efficient, high-power, tunable, and compact designs. In this work, we propose a tunable, narrowband THz pulse source based on non-collinear optical parametric amplification (NOPA), capable of generating narrowband THz pulses in the 2–6 THz range, with advantages over other THz generation schemes in efficiency, power, and size. This scheme utilizes a gallium phosphide (GaP) crystal in the NOPA process. Replacing the nonlinear crystal with other materials, such as zinc selenide (ZnSe) or silver gallium selenide (AgGaSe2), can extend the generated THz pulses to a broader frequency range.