Scaling up the energy of THz pulses created by optical rectification

A. G. Stepanov, J. Kuhl, I. Z. Kozma, E. Riedle, G. Almasi, J. Hebling

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

The possibility for up-scaling the energy of sub-ps THz pulses generated by tilted pulse front excitation is demonstrated. Using 150-fs-long 500 μJ optical pump pulses at 800 nm up to 240 nJ THz pulse energy has been achieved. For a 1.2 mm2 pump spot area, the energy conversion efficiency of pump energy to THz pulse energy had a maximum of 5 × 10-4 at 300 μJ pump pulse energy. The corresponding photon conversion efficiency amounts to 10%. For comparison, the maximum attainable THz pulse energy was limited to 3.1 nJ if a line focusing excitation geometry was utilized. This limit was reached at 32 μJ pump energy. For the latter configuration the THz energy dropped for larger pump energies. The tilted pulse front excitation allows further up-scaling of the THz pulse energy by using a larger pump spot size and still stronger pump pulses.

Original languageEnglish
Pages (from-to)5762-5768
Number of pages7
JournalOptics Express
Volume13
Issue number15
DOIs
Publication statusPublished - Jul 25 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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