Abstract
In this paper we present the fabrication and characterization of rib waveguides made on (Yb,Nb):RbTiOPO4/RbTiOPO4 epitaxial layers. Liquid phase epitaxy (LPE) was used to grow planar thin films followed by Ar+ ion milling for surface rib fabrication. Here, we report the detailed fabrication procedure and characterization of the ribs. The study reveals good optical confinement and that type II second harmonic generation inside the rib was obtained, showing the generation of green light at 570 nm.
Highlights
RbTiOPO4 (RTP) is a nonlinear optical crystal that belongs to the KTiOPO4 (KTP) family and crystallizes in the orthorhombic space group Pna21 [1]
In this paper we present the fabrication and characterization of rib waveguides made on (Yb,Nb):RbTiOPO4/RbTiOPO4 epitaxial layers
Liquid phase epitaxy (LPE) was used to grow planar thin films followed by Ar+ ion milling for surface rib fabrication
Summary
RbTiOPO4 (RTP) is a nonlinear optical crystal that belongs to the KTiOPO4 (KTP) family and crystallizes in the orthorhombic space group Pna21 [1]. RTP has other interesting properties, such as a high laser damage threshold, about 2 times larger than that of KTP [8,9], large electro-optical coefficients, low dielectric constants [10], high chemical stability and low photorefractive damage susceptibility [11]. Owing to all these interesting properties, RTP is a promising candidate as a platform material for integrated photonics
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