Deep-subwavelength waveguiding via inhomogeneous second-harmonic generation

Deep-subwavelength waveguiding via inhomogeneous second-harmonic generation

We theoretically investigate second-harmonic generation in extremely narrow, subwavelength semiconductor and dielectric waveguides. We discuss a guiding mechanism characterized by the inhibition of diffraction and the suppression of cutoff limits in the context of a light trapping phenomenon that se...

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Veröffentlicht in:Optics letters 2012-08, Vol.37 (15), p.3093-3095
Hauptverfasser: Roppo, Vito, Vincenti, Maria Antonietta, de Ceglia, Domenico, Scalora, Michael
Format: Artikel
Sprache:eng
Schlagworte:
Dielectric waveguides
Diffraction
Group velocity
Harmonics
Inhibition
Semiconductors
Trapping
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Zusammenfassung:We theoretically investigate second-harmonic generation in extremely narrow, subwavelength semiconductor and dielectric waveguides. We discuss a guiding mechanism characterized by the inhibition of diffraction and the suppression of cutoff limits in the context of a light trapping phenomenon that sets in under conditions of general phase and group velocity mismatch between the fundamental and the generated harmonic.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.003093