THz generation using a reflective stair-step echelon

Optics Express
Benjamin K Ofori-OkaiKeith A Nelson

Abstract

We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating. The THz output was characterized using both a 1-lens and 3-lens imaging system to set the tilt angle at room and cryogenic temperatures. Using broadband 800 nm pulses with a pulse energy of 0.95 mJ and a pulse duration of 70 fs (24 nm FWHM bandwidth, 39 fs transform limited width), we produced THz pulses with field strengths as high as 500 kV/cm and pulse energies as high as 3.1 μJ. The highest conversion efficiency we obtained was 0.33%. In addition, we find that the echelon is easily implemented into an experimental setup for quick alignment and optimization.

References

Jan 18, 2003·Science·T FeurerKeith A Nelson
Oct 21, 2002·Optics Express·Janos HeblingJurgen Kuhl
Sep 3, 2007·Optics Express·Matthias C HoffmannKeith A Nelson
Jul 1, 2010·Optics Express·J A FülöpJ Hebling
Sep 22, 2011·Optics Express·József András FülöpJános Hebling
Nov 24, 2011·Physical Review Letters·Sharly FleischerKeith A Nelson
Dec 22, 2011·Nature Communications·H HiroriK Tanaka
Jan 10, 2012·The Review of Scientific Instruments·Christopher A WerleyKeith A Nelson
Sep 26, 2012·Physical Review Letters·Sharly FleischerKeith A Nelson
Jun 12, 2013·Physical Review Letters·Kebin FanRichard D Averitt
Oct 10, 2013·The Journal of Physical Chemistry. B·Harold Y HwangKeith A Nelson
Oct 17, 2014·Optics Express·J A FülöpJ Hebling
Oct 17, 2014·Optics Express·Koustuban RaviFranz Kärtner
Oct 16, 2015·Optics Letters·Masaaki TsubouchiMomoko Maruyama

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Citations

Nov 25, 2018·Optics Express·Lu WangFranz Kärtner
Feb 16, 2019·Optics Letters·Priyo Syamsul NugrahaJános Hebling
Nov 2, 2019·Optics Express·Koustuban RaviFranz X Kärtner

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