High-harmonic generation from a subwavelength dielectric resonator
Harmonic
DOI:
10.1126/sciadv.adg2655
Publication Date:
2023-04-26T18:00:51Z
AUTHORS (10)
ABSTRACT
Higher-order optical harmonics entered the realm of nanostructured solids being observed recently in gratings and metasurfaces with a subwavelength thickness. Structuring materials at scale allows us toresonantly enhance efficiency nonlinear processes reduce size high-harmonic sources. We report observation up to seventh harmonic generated from single resonator made AlGaAs material. This process is enabled by careful engineering geometry for supporting an mode associated quasi-bound state continuum mid-infrared spectral range around λ = 3.7 μm pump wavelength. The volume measures ~0.1 λ3. resonant modes are excited azimuthally polarized tightly focused beam. evaluate contributions perturbative nonperturbative nonlinearities generation process. Our work proves possibility miniaturize solid-state sources high volumes.
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