AI Article Synopsis
- Researchers generated terahertz (THz) pulses with an energy of 0.2 mJ using lithium niobate and Ti:sapphire laser pulses at room temperature.
- They improved the efficiency of converting 800 nm laser light to THz waves to 0.3% by adjusting the laser's pulse characteristics to minimize multi-photon absorption.
- This method suggests a potential for generating even larger THz pulses using current Ti:sapphire laser systems capable of producing Joule-level energy in very short pulses.
Article Abstract
We demonstrate generation of 0.2 mJ terahertz (THz) pulses in lithium niobate driven by Ti:sapphire laser pulses at room temperature. Employing tilted pulse front technique, the 800 nm-to-THz energy conversion efficiency has been optimized to 0.3% through chirping the sub-50 fs pump laser pulses to overcome multi-photon absorption and to extend effective interaction length for phase matching. Our approach paves the way for mJ-level THz generation via optical rectification using existing Ti:sapphire laser systems which can deliver Joule-level pulse energy with sub-50 fs pulse duration.
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| http://dx.doi.org/10.1364/OE.26.007107 | DOI Listing |
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