Quasi-phase-matched second harmonic generation of UV light using AlN waveguides

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

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.

• Jezik: Angleški jezik
• Ključne besede: nonlinear optics, optical waveguides, second harmonic generation, semiconductors
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Leto izida: 2019
• Št. strani: Str. 103504-1-103504-4
• Številčenje: Vol. 114, iss. 10
• PID: 20.500.12556/RUL-106753
• UDK: 535.18
• ISSN pri članku: 0003-6951
• DOI: 10.1063/1.5087058
• COBISS.SI-ID: 3297380
• Datum objave v RUL: 15.03.2019

Gradivo je del revije

• Naslov: Applied physics letters
• Skrajšan naslov: Appl. phys. lett.
• Založnik: American Institute of Physics
• ISSN: 0003-6951
• COBISS.SI-ID: 24984832

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: nelinearna optika, optični valovodi, frekvenčno podvajanje, polprevodniki