Photonics Research, Volume. 11, Issue 11, 1814(2023)

Multiple conical odd harmonics from filament-inscribed nanogratings

Robertas Grigutis, Vytautas Jukna, Gintaras Tamošauskas, and Audrius Dubietis*
Author Affiliations
  • Laser Research Center, Vilnius University, LT-10223 Vilnius, Lithuania
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    Figures & Tables(7)
    Emission patterns at the output of the crystal, recorded (a) at the very beginning of the experiment and after (b) 1 h and (c) 2.4 h of exposure time.
    Measured average powers of conical third, fifth, and seventh harmonics as functions of exposure time.
    Angle-resolved spectra of supercontinuum and harmonics emissions measured after (a) 3 min, (b) 1 h, and (c) 4 h of exposure time.
    Angle-integrated spectra of conical third (black curves), fifth (red curves), and seventh (blue curves) harmonics measured after (a) 1 h and (b) 4 h of exposure time.
    Time evolutions of angle-integrated (a) third-harmonic and (b) fifth-harmonic spectra.
    (a) Intensified image showing angular distribution of conical odd harmonics. Wave-vector diagrams for the generation of (b) third, (c) fifth, (d) seventh, and (e) ninth conical harmonics.
    Measured and calculated harmonics external cone angles (blue) and calculated nanograting periods (red).
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    Robertas Grigutis, Vytautas Jukna, Gintaras Tamošauskas, Audrius Dubietis. Multiple conical odd harmonics from filament-inscribed nanogratings[J]. Photonics Research, 2023, 11(11): 1814

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    Paper Information

    Category: Nonlinear Optics

    Received: Apr. 26, 2023

    Accepted: Aug. 21, 2023

    Published Online: Oct. 7, 2023

    The Author Email: Audrius Dubietis (audrius.dubietis@ff.vu.lt)

    DOI:10.1364/PRJ.494150

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