20.500.12556/RUL-106753 Quasi-phase-matched second harmonic generation of UV light using AlN waveguides As an alternative to electrically injected diodes, UV light emission can be obtained via second harmonic generation (SHG). In weakly birefringent materials such as aluminum nitride (AlN), the phase matching of the driving and second harmonic waves can be achieved by the quasi-phase-matching (QPM) technique, where the polarity of the material is periodically changed commensurate with the coherence wavelength. QPM also allows the use of the highest nonlinear susceptibility, and therefore, higher conversion efficiencies are possible. In this work, the QPM SHG of UV light in AlN lateral polar structure-based waveguides is demonstrated. The peak intensity of the frequency doubled laser light was measured at 344nm and 472nm wavelengths, in agreement with dispersion-based theoretical predictions. These results confirm the potential of III-nitride-based lateral polar structures for quasi-phase-matched nonlinear optics and for frequency doubling media for UV light generation. nonlinear optics optical waveguides second harmonic generation semiconductors nelinearna optika optični valovodi frekvenčno podvajanje polprevodniki true false false Angleški jezik Slovenski jezik Neznano 2019-03-15 09:52:15 2019-03-15 09:52:15 2022-08-19 03:46:47 0000-00-00 00:00:00 2019 0 0 Str. 103504-1-103504-4 iss. 10 Vol. 114 2019 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2020-03-14 535.18 0003-6951 10.1063/1.5087058 3297380 24984832 RAZ_Alden_Dorian_i2019.pdf RAZ_Alden_Dorian_i2019.pdf 1 362A29D73B1BCB505817590061FD8BF6 b329ab1958b9ab188db9e11e898576ce006dfb6d8a2336c006a9c783c1270840 5e364d27-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=117521 Fakulteta za matematiko in fiziko 0 0 0