Absorption-reduced waveguide structure for efficient terahertz generation

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Abstract

An absorption-reduced planar waveguide structure is proposed for increasing the efficiency of terahertz (THz) pulse generation by optical rectification of femtosecond laser pulses with tilted-pulse-front in highly nonlinear materials with large absorption coefficient. The structure functions as waveguide both for the optical pump and the generated THz radiation. Most of the THz power propagates inside the cladding with low THz absorption, thereby reducing losses and leading to the enhancement of the THz generation efficiency by up to more than one order of magnitude, as compared with a bulk medium. Such a source can be suitable for highly efficient THz pulse generation pumped by low-energy (nJ-μJ) pulses at high (MHz) repetition rates delivered by compact fiber lasers.

Original languageEnglish
Article number233507
JournalApplied Physics Letters
Volume107
Issue number23
DOIs
Publication statusPublished - Dec 7 2015

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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