Journal article
Compact titanium dioxide waveguides with high nonlinearity at telecommunication wavelengths
Department of Photonics Engineering, Technical University of Denmark1
Nanophotonic Devices, Department of Photonics Engineering, Technical University of Denmark2
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark3
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark4
Dense integration of photonic integrated circuits demands waveguides simultaneously fulfilling requirements on compactness, low loss, high nonlinearity, and capabilities for mass production. In this work, titanium dioxide waveguides with a thick core of 380 nm exhibiting a compact mode size (0.43 mu m(2)) and a low loss (5.4 +/- 1 dB/cm) at telecommunication wavelengths around 1550 nm have been fabricated and measured.
A microring resonator having a 50 mu m radius has been measured to have a loaded quality factor of 53500. Four-wave mixing experiments reveal a nonlinear parameter for the waveguides of 21-34 W-1 m(-1) corresponding to a nonlinear index around 2.3-3.6 x 10(-18) m(2)/W, which results in a wavelength conversion efficiency of -36.2 dB.
These performances, together with the potentially simple dispersion engineering to the fabricated waveguides by the post processes, yield a strong promise for the titanium dioxide waveguides applied in photonic integrated circuits, especially for nonlinear implementations. (C) 2018 Optical Society of America
| Language: | English |
|---|---|
| Year: | 2018 |
| Pages: | 1055-1063 |
| ISSN: | 10944087 |
| Types: | Journal article |
| DOI: | 10.1364/OE.26.001055 |
| ORCIDs: | Guan, Xiaowei , Hu, Hao , Oxenløwe, Leif Katsuo and Frandsen, Lars Hagedorn |
Atomic and Molecular Physics, and Optics Chemical Products Generally Dense integration Dispersion engineering Four wave mixing High nonlinearity Inorganic Compounds Integrated circuits Loaded quality factor Microring resonator Non-linear parameters Optical Devices and Systems Optical resonators Oxides Photonic devices Photonic integrated circuits Photonic integration technology Semiconductor Devices and Integrated Circuits Telecommunication wavelengths Titanium Titanium and Alloys Titanium dioxide Waveguides
