Quasi-phase-matched frequency conversion in KNbO3 structures consisting of 90-degree ferroelectric domains

Periodic 90° domain structure with 18.6 μm periodicity was fabricated by applying a 200 V/mm electric field over (1̄01)-cut KNbO 3 plate. The blue light generation by quasi-phase-matched frequency doubling in this periodic 90° domain structure is demonstrated. The 90° domain structure completely com...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2005, Vol.81, p.761
Main Authors: Hirohashi, Junji, Pasiskevicius, Valdas
Format: Article
Language:English
Subjects:
Engineering physics
fabrication
generation
optical parametric oscillation
Optical physics
Optisk fysik
periodically-poled linbo3
refractive-indexes
single-crystals
TECHNOLOGY
TEKNIKVETENSKAP
Teknisk fysik
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Summary:Periodic 90° domain structure with 18.6 μm periodicity was fabricated by applying a 200 V/mm electric field over (1̄01)-cut KNbO 3 plate. The blue light generation by quasi-phase-matched frequency doubling in this periodic 90° domain structure is demonstrated. The 90° domain structure completely compensates for a Poynting vector walk-off of the second-harmonic beam. Moreover, these structures exhibit amphoteric Poynting vector refraction properties, i.e., the refraction can be negative or positive depending on the angle of incidence at the 90° domain boundary.
ISSN:1432-0649
0946-2171
DOI:10.1007/s00340-005-1956-5