Dorian Alden (Author), Tinkara Troha (Author), Ronny Kirste (Author), Seiji Mita (Author), Qiang Guo (Author), Axel Hoffmann (Author), Marko Zgonik (Author), Ramón Collazo (Author), Zlatko Sitar (Author)

Abstract

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.

Keywords

nelinearna optika;optični valovodi;frekvenčno podvajanje;polprevodniki;nonlinear optics;optical waveguides;second harmonic generation;semiconductors;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 535.18
COBISS: 3297380 Link will open in a new window
ISSN: 0003-6951
Views: 839
Downloads: 335
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Other data

Secondary language: Slovenian
Secondary keywords: nelinearna optika;optični valovodi;frekvenčno podvajanje;polprevodniki;
Embargo end date (OpenAIRE): 2020-03-14
Pages: str. 103504-1-103504-4
Volume: ǂVol. ǂ114
Issue: ǂiss. ǂ10
Chronology: 2019
DOI: 10.1063/1.5087058
ID: 11055173